Research Publications

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  1. Matthew G Boebinger, Courtney Brea, Li‐Ping Ding, Sudhajit Misra, Olugbenga Olunloyo, Yiling Yu, Kai Xiao, Andrew R Lupini, Feng Ding, Guoxiang Hu, Panchapakesan Ganesh, Stephen Jesse, Raymond R Unoci, The Atomic Drill Bit: Precision Controlled Atomic Fabrication of 2D Materials, Advanced Materials, 2210116 (2023).
  2. Sumner B Harris, Yu-Chuan Lin, Alexander A Puretzky, Liangbo Liang, Ondrej Dyck, Tom Berlijn, Gyula Eres, Christopher M Rouleau, Kai Xiao, David B Geohegan, Real-Time Diagnostics of 2D Crystal Transformations by Pulsed Laser Deposition: Controlled Synthesis of Janus WSSe Monolayers and Alloys, ACS Nano, DOI://10.1021/acsnano.2c09952 (2023).


  1. W. Luo, A. D Oyedele, N. Mao, A. Puretzky, K. Xiao, L. Liang, X. Ling, Excitation-Dependent Anisotropic Raman Response of Atomically Thin Pentagonal PdSe2, ACS Physical Chemistry Au, 2(6), 482 (2022). 
  2. N. Li, A. Okmi, T. Jabegu, H. Zheng, K. Chen, A. Lomashvili, W. Williams, D. Maraba, I. Kravchenko, K. Xiao, K. He, S. Lei, van der Waals Semiconductor Empowered Vertical Color Sensor, ACS Nano, 16, 8619–8629 (2022). 
  3. A. Okmi, X. Xiao, Y. Zhang, R. He, O. Olunloyo, S. B Harris, T. Jabegu, N. Li, D. Maraba, Y. Sherif, O. Dyck, I. Vlassiouk, K. Xiao, P. Dong, B. Xu, S. Lei, Discovery of Graphene‐Water Membrane Structure: Toward High‐Quality Graphene Process, Advanced Science, 2201336 (2022).
  4. K. Xiao, D. B. Geohegan, Laser synthesis and processing of atomically thin 2D materials, Trends in Chemistry, 4, 769(2022). 
  5. Y. Gu, L. Zhang, H. Cai, L. Liang, C. Liu, A. Hoffman, Y. Yu, A. Houston, A. A. Puretzky, G. Duscher, P. D. Rack, C. M. Rouleau, X. Meng, M. Yoon, D. B. Geohegan, Kai Xiao, Stabilized synthesis of 2D verbeekite: Monoclinic PdSe2 crystals with high mobility and in-plane optical and electrical anisotropy, ACS Nano. 16, 13900 (2022). Note: This work was highlighted as the journal cover. 
  6. T. Zheng, Y.-C. Lin, N. Rafizadeh, D. B. Geohegan, Z. Ni, K. Xiao, H. Zhao, Janus Monolayers for Ultrafast and Directional Charge Transfer in Transition Metal Dichalcogenide Heterostructures, ACS Nano 16, 4197-4205 (2022). 
  7. D. Zhou, M. Fuentes-Cabrera, A. Singh, R. R Unocic, J. M. Y Carrillo, K. Xiao, Y. Li, B. Li, Atomic Edge-Guided Polyethylene Crystallization on Monolayer Two-Dimensional Materials, Macromolecules, 55(2), 559 (2022). 
  8. W. Ko, Z. Gai, A. A Puretzky, L. Liang, T. Berlijn, J. A Hachtel, K. Xiao, P. Ganesh, M. Yoon, A.-P. Li, Understanding Heterogeneities in Quantum Materials, Advanced Materials, 2106909 (2022).  
  9. K. Wang, L. Zhang, G. D Nguyen, X. Sang, C. Liu, Y. Yu, W. Ko, R. R Unocic, A. A Puretzky, C. M Rouleau, D. B Geohegan,. Fu, G. Duscher, A.‐P. Li, M. Yoon, K. Xiao, Selective Antisite Defect Formation in WS2 Monolayers via Reactive Growth on Dilute W‐Au Alloy Substrates, Advanced Materials, 34(3), 2106674(2022). Note: This work was highlighted as the journal Frontpieces.


  1.  Y.-Y. Pai, C. E Marvinney, M. A Feldman, B. Lerner, Y. S. Phang, K. Xiao, J. Yan, L. Liang, J. Lapano, M. Brahlek, B. J Lawrie, Magnetostriction of α-RuCl3 Flakes in the Zigzag Phase, The Journal of Physical Chemistry C, 125 (46), 25687-25694 (2021).
  2. Y. Guo, S. V Kalinin, H. Cai, K. Xiao, S. Krylyuk, A. V Davydov, Q. Guo, A. R Lupini, Defect detection in atomic-resolution images via unsupervised learning with translational invariance, npj Computational Materials, 7(1), 1-9 (2021). 

  3.  J. Chen, S. Das, M. Shao, G. Li, H. Lian, J. Qin, J. F Browning, J. K Keum, D. Uhrig, G. Gu, K. Xiao, Phase segregation mechanisms of small molecule‐polymer blends unraveled by varying polymer chain architecture, SmartMat, 2(3), 367-377 (2021). Note: This work was selected as the journal cover.

  4. C Liu, YC Lin, M Yoon, Y Yu, AA Puretzky, CM Rouleau, MF Chisholm, … Understanding Substrate-Guided Assembly in van der Waals Epitaxy by in Situ Laser Crystallization within a Transmission Electron Microscope, ACS nano 15 (5), 8638-8652 (2021).

  5. Y. Yu, G.S. Jung, C. Liu, YC Lin, C.M. Rouleau, M. Yoon, G. Eres, G. Duscher, K. Xiao, S. Irle, A. A Puretzky, D. B Geohegan, Strain-Induced Growth of Twisted Bilayers during the Coalescence of Monolayer MoS2 Crystals, ACS nano 15 (3), 4504 (2021).

  6. Y.‐C. Lin, R. Torsi, D. B. Geohegan, J. A. Robinson, K. Xiao, Controllable Thin‐Film Approaches for Doping and Alloying Transition Metal Dichalcogenides Monolayers, Adv. Sci., 2004249 (2021). (Invited Review)

  7. T. Zheng, Y.-C. Lin, Y. Yu, P. Valencia-Acuna, A. A Puretzky, R. Torsi, C. Liu, I. N Ivanov, G. Duscher, D. B Geohegan, Z. Ni, K. Xiao, H. Zhao, Excitonic Dynamics in Janus MoSSe and WSSe Monolayers, Nano Lett., 21, 931 (2021).

  8. Y. Liu, A. V. Levlev, N. Borodinov, M. Lorenz, K. Xiao, M. Ahmadi, B. Hu, S. V. Kalinin, O. S. Ovchinnikova, Direct Observation of Photoinduced Ion Migration in Lead Halide Perovskites, Advanced Functional Materials, 31, 2008777 (2021). 

  9. H. Cai, Y. Yu, Y.-C. Lin, A. A. Puretzky, D. B. Geohegan, K. Xiao, Heterogeneities at multiple length scales in 2D layered materials: From localized defects and dopants to mesoscopic heterostructures, Nano Research, 14, 1625 (2021). Invited Review and Back cover.


  1. Fu, Mingming; Liang, Liangbo; Zou, Qiang; Nguyen, Giang D; Xiao, Kai; Li, An-Ping; Kang, Junyong; Wu, Zhiming; Gai, Zheng, Defects in Highly Anisotropic Transition-Metal Dichalcogenide PdSe2, The Journal of Physical Chemistry Letters 11, 740-746 (2020).
  2. Kai Xiao, Zakaria Y. Al Balushi, Sefaattin Tongay, Introduction of Focus Section “Heterogeneity in Beyond Graphene 2D Materials, Journal of Materials Research 35 (11), 1349 (2020).
  3. Liu, Yongtao; Li, Mingxing; Wang, Miaosheng; Collins, Liam; Ievlev, Anton V; Jesse, Stephen; Xiao, Kai; Hu, Bin; Belianinov, Alex; Ovchinnikova, Olga S, Twin domains modulate light-matter interactions in metal halide perovskites, APL Materials 8, 11106 (2020).
  4. Hoffman, Anna; Gu, Yiyi; Tokash, Justin; Woodward, Jonathan; Xiao, Kai; Rack, Philip D, Layer-by-layer thinning of PdSe2 flakes via Plasma Induced Oxidation and Sublimation, ACS Applied Materials & Interfaces 12, 7345 (2020).
  5. Liu, Yongtao; Ievlev, Anton V; Collins, Liam; Belianinov, Alex; Keum, Jong K; Ahmadi, Mahshid; Jesse, Stephen; Retterer, Scott T; Xiao, Kai; Huang, Jingsong, Strain–Chemical Gradient and Polarization in Metal Halide Perovskites, Advanced Electronic Materials, 6(4), 1901235 (2020).
  6. Dagnall, Katelyn A; Foley, Benjamin J; Cuthriell, Shelby A; Alpert, Matthew R; Deng, Xiaoyu; Chen, Alexander Z; Sun, Zeming; Gupta, Mool C; Xiao, Kai; Lee, Seung-Hun, Relationship Between the Nature of Monovalent Cations and Charge Recombination in Metal Halide Perovskites, ACS Applied Energy Materials 3, 1298 (2020).
  7. Nguyen, Giang D; Oyedele, Akinola D; Haglund, Amanda; Ko, Wonhee; Liang, Liangbo; Puretzky, Alexander A; Mandrus, David; Xiao, Kai; Li, An-Ping, Atomically Precise PdSe2 Pentagonal Nanoribbons, ACS nano 14 (2), 1951 (2020).
  8. Ran, Junhui; Dyck, Ondrej O; Wang, Xiaozheng; Yang, Bin; Geohegan, David B; Xiao, Kai, Electron‐Beam‐Related Studies of Halide Perovskites: Challenges and Opportunities, Advanced Energy Materials 1903191 (2020).
  9. Puretzky, Alexander A; Lin, Yu-Chuan; Liu, Chenze; Strasser, Alex M; Yu, Yiling; Canulescu, Stela; Rouleau, Christopher M; Xiao, Kai; Duscher, Gerd; Geohegan, David B, In situ laser reflectivity to monitor and control the nucleation and growth of atomically thin 2D materials, 2D Materials 7(2), 25048 (2020).
  10. Lin, Yu-Chuan; Liu, Chenze; Yu, Yiling; Zarkadoula, Eva; Yoon, Mina; Puretzky, Alexander A; Liang, Liangbo; Kong, Xiangru; Gu, Yiyi; Strasser, Alex, Low Energy Implantation into Transition-Metal Dichalcogenide Monolayers to Form Janus Structures, ACS nano 14(4), 3896(2020).
  11. Gu, Yiyi; Cai, Hui; Dong, Jichen; Yu, Yiling; Hoffman, Anna N; Liu, Chenze; Oyedele, Akinola D; Lin, Yu‐Chuan; Ge, Zhuozhi; Puretzky, Alexander A, Two‐Dimensional Palladium Diselenide with Strong In‐Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition, Advanced Materials 32(19), 1906238 (2020).
  12. Doughty, Benjamin; Simpson, Mary Jane; Das, Sanjib; Xiao, Kai; Ma, Ying-Zhong, Connecting Femtosecond Transient Absorption Microscopy with Spatially Co-Registered Time Averaged Optical Imaging Modalities, The Journal of Physical Chemistry A (2020).
  13. Li, Xufan; Kahn, Ethan; Chen, Gugang; Sang, Xiahan; Lei, Jincheng; Passarello, Donata; Oyedele, Akinoda D; Zakhidov, Dante; Chen, Kai-Wen; Chen, Yu-Xun, Surfactant-Mediated Growth and Patterning of Atomically Thin Transition Metal Dichalcogenides, ACS nano (2020).
  14. Y Gu, H Cai, J Dong, Y Yu, AN Hoffman, C Liu, AD Oyedele, YC Lin, Z Ge, A A Puretzky, G Duscher, M F Chisholm, PD Rack, CM Rouleau, Z Gai, X Meng, F Ding, DB Geohegan, K Xiao, 2D Materials: Two‐Dimensional Palladium Diselenide with Strong In‐Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition (Adv. Mater. 19/2020), Advanced Materials, 32(19), 2070152 (2020).
  15. Weijun Luo, Akinola Oyedel, Yiyi Gu, Tianshu Li, Xingzhi Wang, Amanda V. Haglund, David Mandrus, Alexander A Puretzky, Kai Xiao, Liangbo Liang, Xi Ling, Anisotropic Phonon Response of few-Layer PdSe2 under Uniaxial Strain, Advanced Functional Materials, 30(35) 2003215 (2020).


  1. Anna N Hoffman, Yiyi Gu, Liangbo Liang, Jason D Fowlkes, Kai Xiao, Philip D Rack, Exploring the air stability of PdSe2 via electrical transport measurements and defect calculations, npj 2D Materials and Applications 3, 1-7 (2019).
  2. H Cai, Y Gu, Y-C Lin, Y Gu, D B Geohegan, K Xiao, Synthesis and emerging properties of 2D layered III-VI metal chalcogenides, Appl. Phys. Rev. 6, 04312 (2019).
  3. J Zhang, X Li, K Xiao, BG Sumpter, AW Ghosh, L Liang, The role of mid-gap phonon modes in thermal transport of transition metal dichalcogenides, Journal of Physics: Condensed Matter 32 (2), 025306 (2019).
  4. Y Liu, L Collins, R Proksch, S Kim, BR Watson, B Doughty, TR Calhoun, …, Reply to: On the ferroelectricity of CH3NH3PbI3 perovskites, Nature materials 18 (10), 1051-1053 (2019).
  5. Y Liu, A V Ievlev, L Collins, N Borodinov, A Belianinov, J K Keum, M Wang, M Ahmadi, S Jesse, K Xiao, B G Sumpter, B Hu, S V Kalinin, O S Ovchinnikova, Light‐Ferroic Interaction in Hybrid Organic–Inorganic Perovskites, Advanced Optical Materials, 7, 1901451 (2019).
  6. J. Wang, S. Senanayak, J. Liu, Y. Hu, Y. Shi, Z. Li, C. Zhang, B. Yang, L. Jiang, D. Di, A. Ievlev, O. Ovchinnikova, T. Ding, H. Deng, L. Tang, Y. Guo, J. Wang, K. Xiao, D. Venkateshvaran, L. Jiang, D. Zhu, H. Sirringhaus, Investigation of Electrode Electrochemical Reactions in CH3NH3PbBr3 Perovskite Single‐Crystal Field‐Effect Transistors, Advanced Materials 31, 1902618 (2019).
  7. A. Oyedele, S. Yang, T. Feng, A. Haglund, Y. Gu, A. Puretzky, D. Briggs, C. Rouleau, M. Chisholm, R. Unocic, D. Mandrus, S. Pantelides, D. Geohegan, K. Xiao, Defect-Mediated Phase Transformation in Anisotropic Two-Dimensional PdSe2 Crystals for Seamless Electrical Contacts, J. Am. Chem. Soc. 141, 8928-8936 (2019).
  8. K Wang, AA Puretzky, Z Hu, BR Srijanto, X Li, N Gupta, H Yu, M Tian, M. Mahjouri-Samani, X. Gao, A. Oyedele, C. Rouleau, G. Eres, B. Yakobson, M. Yoon, K. Xiao, D. B Geohegan, Strain tolerance of two-dimensional crystal growth on curved surfaces, Science Advances 5, eaav4028 (2019).
  9. X Sang, X Li, AA Puretzky, DB Geohegan, K Xiao, RR Unocic, Atomic Insight into Thermolysis‐Driven Growth of 2D MoS2, Advanced Functional Materials 29, 1902149 (2019).
  10. GG Jiang, JW Klett, J McFarlane, A Ievlev, K Xiao, JK Keum, M Yoon, P Im, M Z Hu, J E Parks, Efficient Solar‐Thermal Distillation Desalination Device by Light Absorptive Carbon Composite Porous Foam, Global Challenges, 1900003 (2019).
  11. Y. Liu, A. Ievlev, L. Collins, A. Belianinov, S. Kim, B. Doughty, S. Jesse, M. Ahmadi, S. T Retterer, K. Xiao, B. G Sumpter, S. Kalinin, B. Hu, O. Ovchinnikova, Multi-Model Imaging of Local Chemistry and Ferroic Properties of Hybrid Organic-Inorganic Perovskites, Microscopy and Microanalysis, 25 (S2), 2076-2077 (2019).
  12. DB Brown, W Shen, X Li, K Xiao, DB Geohegan, S Kumar, Spatial Mapping of Thermal Boundary Conductance at Metal–Molybdenum Diselenide Interfaces, ACS applied materials & interfaces 11 (15), 14418-14426 (2019)
  13. MG Stanford, YC Lin, MG Sales, AN Hoffman, CT Nelson, K. Xiao, S. McDonnell, P. D Rack, Lithographically patterned metallic conduction in single-layer MoS2 via plasma processing, npj 2D Materials and Applications 3 (1), 131(2019).
  14. M. Zeng, Y. Chen, E. Zhang, J. Li, R. G.Mendes, X. Sang, S. Luo, W. Ming, Y. Fu, M. Du, L. Zhang, D. S. Parker, R. R.Unocic, K. Xiao, C. Wang, T. Zhang, Y. Xiao, M. H. Rümmeli, F. Xiu, L. Fu, Molecular Scaffold Growth of Two-Dimensional, Strong Interlayer-Bonding-Layered Materials, CCS Chemistry 1, 117 (2019).
  15. A Maksov, O Dyck, K Wang, K Xiao, DB Geohegan, BG Sumpter, RK Vasudevan, S Jesse, SV Kalinin, M Ziatdinov, Deep learning analysis of defect and phase evolution during electron beam-induced transformations in WS2, npj Computational Materials 5 (1), 129 (2019).
  16. X Li, J Zhang, AA Puretzky, A Yoshimura, X Sang, Q Cui, Y Li, L Liang, AW Ghosh, H. Zhao, RR Unocic, V Meunier, CM Rouleau, BG Sumpter, DB Geohegan, K Xiao. Isotope-Engineering the Thermal Conductivity of Two-Dimensional MoS2, ACS Nano 13, 24812 (2019).
  17. N Briggs, S Subramanian, Z Lin, X Li, X Zhang, K Zhang, K Xiao, D Geohegan, R Wallace, L Chen, M Terrones, A Ebrahimi, S Das, J Redwing, C Hinkle, K Momeni, A Duin, V Crespi, S Kar, JA Robinson, A roadmap for electronic grade 2D materials, 2D Materials 6, 0220019 (2019).
  18. YZ Ma, B Doughty, MJ Simpson, S Das, K Xiao, On the origin of spatially dependent electronic excited-state dynamics in mixed hybrid perovskite thin films, Lithuanian Journal of Physics 58 (4), 326-336 (2019).


1. Rugang Geng, Ram C. Subedi, Hoang M. Luong, Minh T. Pham, Weichuan Huang, Xiaoguang Li, Kunlun Hong, Ming Shao, Kai Xiao, Lawrence A. Hornak, and Tho T. Nguyen, “Effect of Electron Localization on the Effective Hyperfine Interaction in Organic Semiconducting Polymers”, Phys Rev Lett.120, 086602 (2018)

2. Cheng Zhang, Pushpa Raj Pudasaini, Akinola David Oyedele, Anton V Ievlev, Liubin Xu, Amanda Vecto Haglund, Joo Hyon Noh, Anthony T Wong, Kai Xiao, Thomas Zac Ward, David Mandrus, Haixuan Xu, Olga S Ovchinnikova, Philip D Rack, “Ion Migration Studies in Exfoliated 2D Molybdenum Oxide via Ionic Liquid Gating for Neuromorphic Device Applications”, ACS Applied Materials & Interfaces, 10, 22623 (2018).

3. Xiahan Sang, Yu Xie, Dundar E Yilmaz, Roghayyeh Lotfi, Mohamed Alhabeb, Alireza Ostadhossein, Babak Anasori, Weiwei Sun, Xufan Li, Kai Xiao, Paul RC Kent, Adri CT van Duin, Yury Gogotsi, Raymond R Unocic, “In situ atomistic insight into the growth mechanisms of single layer 2D transition metal carbides”,Nature Comm, 9, 2266 (2018).

4. Xiahan Sang, Xufan Li, Wen Zhao, Jichen Dong, Christopher M. Rouleau, David B. Geohegan, Feng Ding, Kai Xiao, Raymond R. Unocic, “In situ edge engineering in two-dimensional transition metal dichalcogenides”, Nature Comm, 9, 2051 (2018).

5. Alexander A Puretzky, Akinola D Oyedele, Kai Xiao, Amanda V Haglund, Bobby G Sumpter, David Mandrus, David B Geohegan, Liangbo Liang, “Anomalous interlayer vibrations in strongly coupled layered PdSe2”, 2D Materials, 5, 035016 (2018).

6. Bin Yang, Wenmei Ming, Mao-Hua Du, Jong K Keum, Alexander A Puretzky, Christopher M Rouleau, Jinsong Huang, David B Geohegan, Xiaoping Wang, Kai Xiao, “Real-Time Observation of Order-Disorder Transformation of Organic Cations Induced Phase Transition and Anomalous Photoluminescence in Hybrid Perovskites”, Advanced Materials, 30, 1705801 (2018).

7. Milad Yarali, Hatem Brahmi, Zhequan Yan, Xufan Li, Lixin Xie, Shuo Chen, Satish Kumar, Mina Yoon, Kai Xiao, Anastassios Mavrokefalos, “The Effect of Metal Doping and Vacancies on the Thermal Conductivity of Monolayer Molybdenum Diselenide”, ACS Applied Materials & Interfaces, 10, 4921 (2018).

8. Bin Yang, Jong K Keum, David B Geohegan, Kai Xiao, “In Situ X-Ray Studies of Crystallization Kinetics and Ordering in Functional Organic and Hybrid Materials”, In-situ Characterization Techniques for Nanomaterials, pages 33-60, Springer, Berlin, Heidelberg, 2018.

9. Matthew Z Bellus, Masoud Mahjouri-Samani, Samuel D Lane, Akinola D Oyedele, Xufan Li, Alexander A Puretzky, David Geohegan, Kai Xiao, Hui Zhao, “Photocarrier transfer across monolayer MoS2-MoSe2 lateral heterostructures”, ACS Nano, 12, 7086 (2018).

10. Pushpa R. Pudasaini, Akinola Oyedele, Cheng Zhang, Michael G Stanford, Nicholas Cross, Anthony T Wong, Anna N Hoffman, Kai Xiao, Gerd Duscher, David G Mandrus, Thomas Z Ward, Philip D Rack,High-performance multilayer WSe2field-effect transistors with carrier type control, Nano Research, 11, 772 (2018).

11. Ding Xu, Weiyin Chen, Mengqi Zeng, Haifeng Xue, Yunxu Chen, Xiahan Sang, Yao Xiao, Tao Zhang, Raymond Unocic, Kai Xiao, Lei Fu,Angewandte Chemie International Edition, 57, 755 (2018).

12. Akinola D. Oyedelea, Christopher M. Rouleau, David B. Geohegan, Kai Xiao, “The growth and assembly of organic molecules and inorganic 2D materials on graphene for van der Waals heterostructures”, Carbon, 131, 246 (2018).

13. Ben Aziza, Zeineb; Zólyomi, Viktor ; Henck, Hugo; Pierucci, Debora; Silly, Mathieu; Avila, Jose; Magorrian, Samuel; Chaste, Julien; Chen, Chaoyu; Yoon, Mina; Xiao, Kai; Sirotti, Fausto; Asensio, Maria; Lhuillier, Emmanuel; Eddrief, Mahmoud; Fal’ko, Vladimir; Ouerghi, Abdelkarim R, “Valence band inversion and spin-orbit effects in the electronic structure of monolayer GaSe“, Phys Rev B 98, 115405 (2018)..

14. Wonhee Ko, Saban M. Hus, Xufan Li, Tom Berlijn, Giang D. Nguyen, Kai Xiao, An-Ping Li, “Tip-induced local strain on MoS2/graphite detected by inelastic electron tunneling spectroscopy”, PRB, 97, 125401 (2018). 

15. J Bauer, LS Quintanar, K Wang, AA Puretzky, K Xiao, DB Geohegan, A Boulesbaa, Ultrafast Exciton Dissociation at the 2D-WS2 Monolayer/Perovskite Interface, J. Phys. Chem. C 122, 28910-289173 (2018). 

16.  N Briggs, MI Preciado, Y Lu, K Wang, J Leach, X Li, K Xiao, S Subramanian, B Wang, A Haque, S Sinnott, JA Robinson, Transformation of 2D group-III selenides to ultra-thin nitrides: enabling epitaxy on amorphous substrates, Nanotechnology 29 (47), 47LT021 (2018).

17. AN Hoffman, MG Stanford, C Zhang, IN Ivanov, AD Oyedele, MG Sales, SJ McDonnell, MR Koehler, DG Mandrus, L Liang, BG Sumpter, K Xiao, PD Rack Atmospheric and Long-term Aging Effects on the Electrical Properties of Variable Thickness WSe2Transistors, ACS applied materials & interfaces 10 (42), 36540-36548 (2018).

18. BJ Foley, S Cuthriell, S Yazdi, AZ Chen, SM Guthrie, X Deng, G Giri, S Lee, K Xiao, B Doughty, Y Ma, JJ Choi, Impact of crystallographic orientation disorders on electronic heterogeneities in metal halide perovskite thin films, Nano letters 18 (10), 6271-6278 (2018).


  1. Maxim Ziatdinov, Ondrej Dyck, Artem Maksov, Xufan Li, Xiahan Sang, Kai Xiao, Raymond R Unocic, Rama Vasudevan, Stephen Jesse, Sergei V Kalinin, Deep Learning of Atomically Resolved Scanning Transmission Electron Microscopy Images: Chemical Identification and Tracking Local Transformations, ACS Nano, 2017, 11 (12), pp 12742–12752 
  2. Henry Yu, Nitant Gupta, Zhili Hu, Kai Wang, Bernadeta R Srijanto, Kai Xiao, David B Geohegan, Boris I Yakobson, ACS Nano, 11, 8612 (2017).
  3. M. Mahjouri-Samani, M. Tian, A. A. Puretzky, M. Chi, K. Wang, G. Duscher, C. M. Rouleau, G. Eres, M. Yoon, J. C. Lasseter, K. Xiao, D. B. Geohegan, “Non-Equilibrium Synthesis of TiO2 Nanoparticle “Building Blocks” for Crystal Growth by Sequential Attachment in Pulsed Laser Deposition”, Nano Letters, 17, 4624 (2017).
  4. M. G Stanford, P. R. Pudasaini, E. T. Gallmeier, L. Liang, N. Cross, A. Oyedele, G. Duscher, M. Mahjouri-Samani; K. Wang; K. Xiao; D. B. Geohegan; A. Belianinov, B. G. Sumpter, P. D. Rack, “High conduction hopping behavior induced in transition metal dichalcogenides by percolating defect networks: toward atomically thin circuits”, Advanced Functional Materials, 27, 1702829 (2017).
  5. M. J. Simpson, B. Doughty, S. Das, K. Xiao, Y.-Z. Ma, “Separating Bulk and Surface Contributions to Electronic Excited-State Processes in Hybrid Mixed Perovskite Thin Films via Multimodal All-Optical Imaging”, J. Phys. Chem. Lett., 8, 3299–3305 (2017).
  6. Z. B. Aziza, D. Pierucci, H. Henck, M. G. Silly, C. David, M. Yoon, F. Sirotti, K. Xiao, M. Eddrief, J.-C. Girard, A. Ouerghi, “Tunable quasiparticle band gap in few-layer GaSe/graphene van der Waals heterostructures”, Phys. Rev. B 96, 035407 (2017)
  7. P. R. Pudasaini, A. Oyedele, C. Zhang, M. G. Stanford, N. Cross, A. T. Wong, A. N. Hoffman, K. Xiao, G. Duscher, D. G. Mandrus, T. Z. Ward, P. D. Rack, “High-performance multilayer WSe2 field-effect transistors with carrier type control”, Nano Res. doi:10.1007/s12274-017-1681-5 (2017).
  8. Pushpa Raj Pudasaini, Michael G Stanford, Akinola Oyedele, Anthony Wong, Anna Hofmann, Dayrl Briggs, Kai Xiao, David G Mandrus, Thomas Z Ward, Philip D Rack, Nanotechnology,
  9. T. Tai, I. V. Kertesz, M.-W. Lin, B. R. Srijanto, D. K. Hensley, K. Xiao, G. J. Berkel, “Polymeric Spatial Resolution Test Patterns for Mass Spectrometry Imaging Using Nano-Thermal Analysis with Atomic Force Microscopy”, Rapid Communications in Mass Spectrometry, 31, 1204 (2017).
  10. X. Li, J. Dong, J. C. Idrobo, A. A. Puretzky, C. M. Rouleau, D. B. Geohegan, F. Ding, K. Xiao, “Edge-controlled Growth and Etching of Two-Dimensional GaSe Monolayers”, J. Am. Chem. Soc. 139, 482 (2017).
  11. B. Yang, C. Brown, J. Huang, L. Collins, X. Sang, R. Unocic, S. Jesse, S. Kalinin, A. Belianinov, J. Jakowski, D. Geohegan, B. G. Sumpter, K. Xiao, O. S. Ovchinnikova, “Enhancing Ion Migration in Grain Boundaries of Hybrid Organic-Inorganic Perovskites by Chlorine”, Advanced Functional Materials, DOI:10.1002/adfm.201700749.
  12. X. Li, A. A. Puretzky, X. Sang, S. KC, M. Tian, F. Ceballos, M. Mahjouri-Samani, K. Wang, R. R. Unocic, H. Zhao, G. Duscher, V. R. Cooper, C. M. Rouleau, D. B. Geohegan, K. Xiao*, “Suppression of Defects and Deep Levels Using Isoelectronic Tungsten Substitution in Monolayer MoSe2“, Advanced Functional Materials, 27, 1603850 (2017). 
  13. A. Oyedele, S. Yang, L. Liang, A. Puretzky, K. Wang, J. Zhang, P. Yu, P. Pudasaini, A. Ghosh, Z. Liu, C. Rouleau, B. Sumpter, M. Chisholm, W. Zhou, P. Rack, D. B. Geoghegan, K. Xiao,”PdSe2: Pentagonal 2D Layers with High Air Stability for Electronics” J. Am. Chem. Soc. 139, 14090 (2017).


  1. X. Sang, Y. Xie, M.-W. Lin, M. A., K. L. V. Aken, Y. Gogotsi, P. R.C. Kent, K. Xiao, and R. R. Unocic, “Atomic Defects in Monolayer Titanium Carbide (Ti3C2Tx)) MXene”, ACS Nano, 10, 9193 (2016).
  2. X. Li, A. A. Puretzky, X. Sang, S. KC, M. Tian, F. Ceballos, M. Mahjouri-Samani, K. Wang, R. R. Unocic, H. Zhao, G. Duscher, V. R. Cooper, C. M. Rouleau, D. B. Geohegan, K. Xiao, “Suppression of Defects and Deep Levels Using Isoelectronic Tungsten Substitution in Monolayer MoSe2“, Advanced Functional Materials, DOI:10.1002/adfm.201603850 (2016) (Invited)
  3.  X. Li, M.-W. Lin, L. Basile, S. M. Hus, A. A. Puretzky, J. Lee, Y.-C. Kuo, L.-Y. Chang, K. Wang, J. C. Idrobo, A.-P. Li, C.-H. Chen, C. M. Rouleau, D. B. Geohegan, K. Xiao, “Isoelectronic tungsten doping in monolayer MoSe2 for carrier type modulation”, 2016, Adv Mater, 28, 8240 (2016).
  4.  W. Zheng, J. Lin, W. Feng, K. Xiao, Y. Qiu, X. Chen, G. Liu, W. Cao, S. T. Pantelides, W. Zhou P Hu, “Patterned Growth of P-TypeMoS2 Atomic Layers Using Sol–Gel as Precursor”, Advanced Functional Materials, 26, 6371 (2016).
  5. M. Mahjouri-Samani, L. Liang, A. D. Oyedele, Y.-S. Kim, M. Tian, N. Cross, K. Wang, M.-W. Lin, A. Boulesbaa, C. M. Rouleau, A. A. Puretzky, K. Xiao, M. Yoon, G. Eres, G. Duscher, B. G. Sumpter, D. B. Geohegan, “Tailoring Vacancies Far Beyond Intrinsic Levels Changes the Carrier Type in Monolayer MoSe2-x Crystals”, Nano Lett., DOI: 10.1021/acs.nanolett.6b02263, (2016).
  6. K. Wang, B. Huang, M. Tian, F. Ceballos, M.-W. Lin, M. Mahjouri-Samani, A. Boulesbaa, A. A Puretzky, C. M Rouleau, M. Yoon, H. Zhao, K. Xiao, G. Duscher, D. B Geohegan, “Interlayer Coupling in Twisted WSe2/WS2 Bilayer Heterostructures Revealed by Optical Spectroscopy”, ACS Nano, DOI: 10.1021/acsnano.6b01486 (2016).
  7.  B. Yang, M. Mahjouri-Samani, C. M. Rouleau, D. B. Geohegan, K. Xiao, “PulsedLaser Deposition of Hierarchical TiO2 for High PerformancePerovskite Solar Cells”, PCCP, 18, 27067(2016). themed issue: Physical chemistry of hybrid perovskite solar cells. (Invited)
  8. S. Das, G. Gu, P. C. Joshi, B. Yang, T. Aytug, C. M Rouleau, D. Geohegan, K. Xiao, “Low Thermal Budget, Photonic-Cured Compact TiO2 Layer for High-Efficiency Perovskite Solar Cells”, J. Mater. Chem. A, 4, 8695 (2016).
  9.  X. Li, M.-W. Lin, J. Lin, B. Huang, A. A. Puretzkya, C. Ma, K. Wang, W. Zhou, S. T. Pantelides, C. Miao, I. Kravchenko, J. Fowlkes, C. M. Rouleaua, D. B. Geohegan, K. Xiao, “Two-dimensional GaSe/MoSe2 misfit bilayer heterojunctions by van der Waals epitaxy”, Science Advances, 2, E1501882 (2016). The image for this paper has been selected as the cover of Semiconductor Todayand This work has been highlighted by MRS BulletinPhotonics SpectraORNL PressOffice of Science of DOEScienceDailyPhys.Org,  Optics and Photonics NewsAAAS EurekAlert, et al.
  10. X. Li, M.-W. Lin, A. A. Puretzkya, L. Basilea, K. Wang, J. C. Idroboa, C. M. Rouleaua, D. B. Geohegan, K. Xiao, “Persistent photoconductivity in two-dimensional Mo1−x Wx Se2–MoSe2 van der Waals heterojunctions”, J. Mater. Res. 31, 923 (2016). (Invited for Focus Issue on “Two-Dimensional Heterostructure Materials”)
  11. B. Yang, J. Keum, O. S. Ovchinnikova, A. Belianinov, S. Chen, M.-H. Du, I.N. Ivanov, C.M. Rouleau, D. B. Geohegan, K. Xiao, “Deciphering Halogen Competition in Organometallic Halide Perovskite Growth”. J. Am. Chem. Soc. 138, 5028 (2016). This work was reported by ORNL News and social media such as ScienceDailyPhys.OrgAAAS EurekAlert.
  12. M-W. Lin, I. Kravchenko, J. Fowlkes, X. Li, A. Puretzky, C. Rouleau, D. Geohegan, K. Xiao, “Thickness Dependent Charge Transport in Few-Layer MoS2 Field-Effect Transistors”, Nanotechnology, 27, 165203 (2016).
  13. M. J. Simpson, B. Doughty, B. Yang, K. Xiao, Y.-Z. Ma, “Separation of Distinct Photoexcitation Species in Femtosecond Transient Absorption Microscopy”, ACS Photonics, 3, 434 (2016). This work was reported by ORNL News.
  14. A. A. Puretzky, L. Liang, X. Li, K. Xiao, B. G. Sumpter, V. Meunier, D. B. Geohegan, “Twisted MoSe2 Bilayers with Variable Local Stacking and Interlayer Coupling Revealed by Low-Frequency Raman Spectroscopy”, ACS Nano, 10, 2736–2744 (2016). This work was reported by ORNL News.
  15. M. Lin, H. L Zhuang, J. Yan, T. Z. Ward, A. A Puretzky, C. M Rouleau, Z. Gai, L. Liang, V. Meunier, B. G Sumpter, P. Ganesh, P. RC Kent, D. B Geohegan, D. G Mandrus, K. Xiao, “Ultrathin nanosheets of CrSiTe3: a semiconducting two-dimensional ferromagnetic material”, Journal of Materials Chemistry C, 4, 315 (2016).
  16.  N. Herath, S. Das, J. Zhu, R. Kumar, J. Chen, K. Xiao, G. Gu, J. F Browning, B. G Sumpter, I. N Ivanov, V. Lauter, “Unraveling the Fundamental Mechanisms of Solvent Additive-Induced Optimization of Power Conversion Efficiencies in Organic Photovoltaic Devices”, ACS Applied Materials & Interfaces, 8, 20220 (2016).
  17.  V. Iberi, L. Liang, A. V Ievlev, M. G Stanford, M.-W. Lin, X. Li, M. Mahjouri-Samani, S. Jesse, B. G Sumpter, S. V Kalinin, D. C Joy, K. Xiao, A. Belianinov, O. S Ovchinnikova, “Nanoforging Single Layer MoSe2 Through Defect Engineering with Focused Helium Ion Beams”, Scientific Report, 6, 30481 (2016).
  18. B. Doughty, M. J. Simpson, B. Yang, K. Xiao, Y.-Z. Ma, “Simplification of femtosecond transient absorption microscopy data from CH3NH3PbI3 perovskite thin films into decay associated amplitude maps”, Nanotechnology, 27, 114002 (2016).
  19.  B. Yang, O. E Dyck, W. Ming, M.-H. Du, S. Das, C. M Rouleau, G. Duscher, D.B Geohegan, K. Xiao, “Observation of Nanoscale Morphological and Structural Degradation in Perovskite Solar Cells by In Situ TEM“, ACS Applied Materials & Interfaces, 8, 32333 (2016) 
  20. A. Boulesbaa, V. E. Babicheva, K. Wang, I. I. Kravchenko, M.-W. Lin, M. Mahjouri-Samani, C. B. Jacobs, A. A. Puretzky, K. Xiao, I. Ivanov, C. M. Rouleau, D. B. Geoghegan, “Ultrafast Dynamics of Metal Plasmons Induced by 2D Semiconductor Excitons in Hybrid Nanostructure Arrays”, ACS Photonics, DOI:10.1021/acsphotonics.6b00618 (2016).
  21.  A. Boulesbaa, K. Wang, M. Mahjouri-Samani, M. Tian, A. A. Puretzky, I. Ivanov, C. M. Rouleau, K. Xiao, B. G. Sumpter, D. B. Geoghegan, “Ultrafast Charge Transfer and Hybrid Exciton Formation in 2D/0D Heterostructures”, J. Am. Chem. Soc. 138, 14713 (2016).
  22.  Z. Lin, A. McCreary, N. Briggs, S. Subramanian, K. Zhang, Y. Sun, X. Li, N. Borys, H. Yuan, S. Fullerton-Shirey, A. Chernikov, H. Zhao, S. McDonnell, A. Lindenberg, K. Xiao, B. LeRoy, M. Drndić, J. Hwang, J. Park, M. Chhowalla, R. Schaak, A. Javey, M. Hersam, J. Robinson, M. Terrones, “2D Materials Advances: From Large Scale Synthesis and Controlled Heterostructures to Improved Characterization Techniques, Defects and Applications”, 2D Materials, 2DM-101002 (2016).
  23. X. Li, J. Dong, J. C. Idrobo, A. A. Puretzky, C. M. Rouleau, D. B. Geohegan, F. Ding, K. Xiao, “Edge-controlled Growth and Etching of Two-Dimensional GaSe Monolayers”, J. Am. Chem. Soc. DOI: 10.1021/jacs.6b11076 (2016).


  1. Ondrej Dyck, Sheng Hu, Sanjib Das, Jong Keum, Kai Xiao, Bamin Khomami, Gerd Duscher, “Quantitative Phase Fraction Detection in Organic Photovoltaic Materials through EELS Imaging”, Polymers, 7, 2446 (2015).
  2. B. Yang, O. Dyck, J. Poplawsky, J. Keum, S. Das, A. Puretzky, T. Aytug, P. C. Joshi, C. M. Rouleau, G. Duscher, D, B. Geohegan, K, Xiao, “Controllable Growth of Perovskite Films by Room-Temperature Air Exposure for Efficient Planar Heterojunction Photovoltaic Cells,” Angewandte Chemie International Edition, 54, 14862 (2015).
  3. B. Yang, O. Dyck, J. Poplawsky, J. Keum, A. Puretzky, S. Das, I. Ivanov, C. Rouleau, G. Duscher, D. Geohegan, and K. Xiao, “Perovskite Solar Cells with Near 100% Internal Quantum Efficiency Based on Large Single Crystalline Grains and Vertical Bulk Hetero-junctions”, J. Am. Chem. Soc., 137, 9210 (2015). The work was selected as a Science Highlight by Office of Sciences, U.S. Department of Energy, featured on DOE’s official website “Problem Turned Into Performance for Solar Cells”, and released as a Research Highlight in August 2015 CNMS User Newsletter.
  4. Sanjib, Das; Yang, Bin; Gu, Gong; Joshi, Pooran; Ivanov, Ilia; Rouleau, Christopher; Aytug, Tolga; Geohegan, David; Xiao, Kai, “High-Performance Flexible Perovskite Solar Cells by Using a Combination of Ultrasonic Spray-Coating and Low Thermal Budget Photonic Curing” ACS Photonics, 2, 680 (2015).
  5. B. R. Watson, B. Yang, K. Xiao, Y.-Z. Ma, B. Doughty, T. R. Calhoun, “Elucidation of Perovskite Film Micro-Orientations Using Two-Photon Total Internal Reflectance Fluorescence Microscopy,” The Journal of Physical Chemistry Letters, 6, 3283 (2015).
  6.  M. J. Simpson, B. Doughty, B. Yang, K. Xiao, Y.-Z. Ma, “Spatial Localization of Excitons and Charge Carriers in Hybrid Perovskite Thin Films,” The Journal of Physical Chemistry Letters, 6, 3041 (2015).
  7. A. K. Chilvery, A. K. Batra, B. Yang, K. Xiao, P. Guggilla, M. D. Aggarwal, R. Surabhi, R. B. Lal, J. R. Currie, B. G. Penn, “Perovskites: transforming photovoltaics, a mini-review,” J. Photon. Energy, 5, 057402 (2015).
  8.  N. Herath, S. Das, J. K Keum, J. Zhu, R. Kumar, I. N Ivanov, B. G Sumpter, J. F. Browning, K. Xiao, G. Gu, P. Joshi, S. Smith, V. Lauter, “Peculiarity of Two Thermodynamically-Stable Morphologies and Their Impact on the Efficiency of Small Molecule Bulk Heterojunction Solar Cells,” Scientific reports, 5, 13407 (2015)
  9. Sanjib Das, Jong K. Keum, James F. Browning, Gong Gu, Bin Yang, Changwoo Do, Wei Chen, Jihua Chen, Ilia N. Ivanov, Kunlun Hong, Adam J. Rondinone, Pooran C. Joshi, David B. Geohegan, Kai Xiao, “Correlating High Power Conversion Efficiency of PTB7:PC71BM Inverted Organic Solar Cells to Nanoscale Structure,”  Nanoscale, 7, 1551 (2015).
  10. B. Wang, R. Sun, D. D. Günbaş, H. Zhang, F. C. Grozema, K. Xiao and S. Jin, “A bundled-stack discotic columnar liquid crystalline phase with inter-stack electronic coupling”, Chem Comm, 51, 11387 (2015). 
  11. Xufan Li, Leonardo Basile, Mina Yoon, Cheng Ma, Alexander A. Puretzky, Jaekwang Lee, Juan C. Idrobo, Miaofang Chi, Christopher M. Rouleau, David B. Geohegan, and Kai Xiao, “Revealing the Preferred Interlayer Orientations and Stackings of Two-Dimensional Bilayer Gallium Selenide Crystals,” Angewandte Chemie International Edition, 54, 2712 (2015) 
  12. X. Li, L. Basile, B. Huang, C. Ma, J. Lee, I. V. Vlassiouk, A. A. Puretzky, M.-W. Lin, M. Yoon, M. Chi, J. C. Idrobo, C. M. Rouleau, B. G. Sumpter, D. B. Geohegan, K. Xiao, “Van der Waals Epitaxial Growth of Two-Dimensional Single-Crystalline GaSe Domains on Graphene”, ACS Nano, 9, 8078 (2015).
  13. M. Mahjouri-Samani, M.-W. Lin, K. Wang, A. R. Lupini, J. Lee, L. Basile, A. Boulesbaa, C. M. Rouleau, A. A. Puretzky, I. N. Ivanov, K. Xiao, M. Yoon, D. B. Geohegan, “Patterned Arrays of Lateral Heterojunctions within Monolayer 2D Semiconductors”, Nature Comm. 6, 7749 (2015). 
  14. A. Boulesbaa, B. Huang, K. Wang, M.-W. Lin, M. Mahjouri-Samani, C. Rouleau, K. Xiao, M. Yoon, B. Sumpter, A. Puretzky, D. Geohegan, “Observation of two distinct negative trions in tungsten disulfide monolayers,” Physical Review B, 92, 115443 (2015). 
  15. W. Feng, J.-B. Wu, X. Li, W. Zheng, X. Zhou, K. Xiao, W. Cao, B. Yang, W. Tian, P. Tan, P. Hu, “Broadband InSe Nanosheet Photodetectors: Thickness Optimization, Simultaneously Ultrahigh Photo-responsivity and Detectivity”, J. Mater. Chem. C, 3, 7022 (2015). 
  16. L.D. Casto, A. J. Clune, J. L. Musfeldt, T. J. Williams, H. L. Zhuang, R. G. Hennig, M.-W. Lin, K. Xiao, B. B. Sales, J.-Q. Yan, D. Mandrus, “Strong Spin-Lattice Coupling in CrSiTe3, APL Materials, 3, 041515 (2015). 
  17.  A.A. Puretzky, L. Liang, X. Li, K. Xiao, K. Wang, M. Mahjouri-Samani, L. Basile, J. C. Idrobo, B. G. Sumpter, V. Meunier, D. B. Geohegan, “Low-Frequency Raman Fingerprints of Two-Dimensional Metal Dichalcogenide Layer Stacking Configurations”, ACS Nano, 9, 6333 (2015)


  1.  M. Mahjouri-Samani, M. Tian, K. Wang, A. Boulesbaa, C. M Rouleau, A. A Puretzky, M. Alan McGuire, B. R Srijanto, K. Xiao, G. Eres, G. Duscher, D. Geohegan, “Digital Transfer Growth of Patterned 2D Metal Chalcogenides by Confined Nanoparticle Evaporation”, ACS Nano, 8, 11567 (2014).
  2.  M. Shao, J. K. Keum, R. Kumar, J. Chen, J. F. Browning, S. Das, W. Chen, J. Hou, C. Do, K. C. Littrell, A. Rondinone, D. B. Geohegan, B. G. Sumpter, K. Xiao*, “Understanding how processing additives tune the nanoscale morphology of high efficiency organic photovoltaic blends: From casting solution to spun-cast thin film”, Adv. Funct. Mater., 24, 6467 (2014).
  3. M. Mahjouri-Samani, R. Gresback, M. Tian, A. A. Puretzky, C. M. Rouleau, G. Eres, I. N. Ivanov, K. Xiao, M. McGuire, G. Duscher, D. B. Geohegan, “Pulsed Laser Deposition of Photoresponsive GaSe Nanosheet Networks”, Adv. Funct. Mater., 24, 6365 (2014).
  4.  X. Li, M.-W. Lin, A. A. Puretzky, J. C. Idrobo, C. Ma, M. Chi, M. Yoon, C. M. Rouleau, I. I. Kravchenko, D. B. Geohegan, K. Xiao,*“Controlled Vapor Phase Growth of Single Crystalline, Two-Dimensional GaSe Crystals with High Photoresponse”, Sci. Rep. 4, 5497 (2014).
  5.  P. Hu, J. Zhang, M. Yoon, W. Feng, P. Tan,W. Zheng, J. Liu, X. Wang, J. C. Idrobo, D. B. Geohegan, K. Xiao,* “Highly Sensitive Phototransistors Based on Two-Dimensional GaTe Nanosheets with Direct Bandgap”, Nano Research, 7, 694 (2014). 
  6. M. Shao, J. Keum, J. Chen, Y. He, W. Chen, J. F. Browning, J. Jakowski, B. G. Sumpter, I. N. Ivanov, Y. Ma, C. M. Rouleau, S. C. Smith, D. B. Geohegan, K. Hong, K. Xiao,* “The isotopic effects of deuteration on the optoelectronic properties of conducting polymers”, Nature Comm. 5, 4180 (2014). This work was highlighted by Materials ViewsORNL ReviewORNL News,
  7. J. Chen, M. Shao, K. Xiao, A. J. Rondinone, Y.-L. Loo, J. E. Anthony, P. R. C. Kent, B. G. Sumpter, J. Huang, “Solvent-Type-Dependent Crystalline Polymorphism of High Performance Small Molecule Organic Semiconductor Thin Films Fabricated by Slow Solution Crystallization”, Nanoscale 6, 449 (2014).


  1. J. Keum, J. F. Browning, K. Xiao, M. Shao, C. E. Halbert, K. Hong, “ Morphological origin for the stratification of P3HT:PCBM blend film studied by neutron reflectometry”, Appl. Phys. Lett. 103, 223301 (2013).
  2. J. Chen, M. Shao, K. Xiao, Z. He, D. Li, B. S. Lokitz, D. Hensley, S. M. Kilbey II, J. E. Anthony, A. J. Rondinone, Z. Bao, “Conjugated Polymer-Mediated Polymorphism of High Performance, Small-Molecule Organic Semiconductor with Tuned Intermolecular Interactions, Enhanced Long-Range Order and Charge Transport”, Chem. Mater. 25, 4378 (2013).
  3. Y. He, M. Shao, K. Xiao, S. Smith, K. Hong, “High-Performance Polymer Photovoltaics with Rationally Designed Fullerene Acceptors”, Solar Energy Materials and Solar Cells 118, 171 (2013)
  4.  A. Mohsin, L. Liu, P. Liu, W. Deng, I. Ivanov, G. Duscher, J. Dunlap, K. Xiao, G. Gu “Synthesis of Millimeter-Size Hexagon-Shaped Graphene Single Crystals on Resolidified Copper”, ACS Nano, 7, 8924 (2013).
  5.  M. Shao, S. Das, J. Chen, J. K. Keum, I. N. Ivanov, G. Gu, W. Durant, D. Li, D. B. Geohegan, K. Xiao*, “High-Performance Organic Field-Effect Transistors with Dielectric and Active Layers Printed Sequentially by Ultrasonic Spraying”, J Mater Chem C 1, 4384 (2013).
  6. P. Hu, L. Wang, M. Yoon, J. Zhang, W. Feng, X. Wang, Z. Wen, J. C. Idrobo, Y. Miyamoto, D. B. Geohegan, K. Xiao*, “Highly Responsive Ultrathin GaS Nanosheet Photodetectors on Rigid and Flexible Substrates”, Nano Lett. 13, 1649 (2013). * (Selected as a highlight on Nature Photonics, 7, 422 (2013)).
  7.  H. Chen, J. Chen, W. Yin, X. Yu, M. Shao, K. Xiao, K. Hong, D. L. Pickel, W. M. Kochemba, S. M., Kilbey, M. Dadmun, “Correlation of Polymeric Compatibilizer Structure to its Impact on the Morphology and Function of P3HT:PCBM Bulk Heterojunctions”, J. Mater. Chem. A, 1, 5309 (2013). *
  8. K. Xiao,* W. Deng, J. K. Keum, M. Yoon, I. V. Vlassiouk, K.W. Clark, A. Li, I. I. Kravchenko, G. Gu, E. A. Payzant, B. G. Sumpter, S. C. Smith, J. F. Browning, D. B. Geohegan, “Surface-Induced Orientation Control of CuPc Molecules for the Epitaxial Growth of Highly Ordered Organic Crystals on Graphene”, J. Am. Chem. Soc., 135, 3680 (2013). (Selected as a spotlight on JACS, 135, 3301 (2013)). 
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  10. S. WuW. LiM. LinQ. BurlingameQ. ChenA. PayzantK. Xiao, and Q. M. Zhang, “Aromatic Polythiourea Dielectrics with Ultrahigh Breakdown Field Strength, Low Dielectric Loss, and High Electric Energy Density,” Adv. Mater. 25, 1734 (2013). 
  11.  J. Keum, K. Xiao, I. N Ivanov, K. Hong, J. Browning, G. Smith, M. Shao, K. C Littrell, A. Rondinone, E. A. Payzant, J. Chen, D. K. Hensley, “Solvent Quality-Induced Nucleation and Growth of Parallelepiped Nanorods in Dilute Poly(3-Hexylthiophene) (P3HT) Solution and the Impact on the Crystalline Morphology of Solution-Cast Thin Film”, CrystEngComm 15, 1114 (2013). 
  12.  S. Wu, M. Shao, Q. Brulingame, X. Chen, M. Lin, K. Xiao, Q. Zhang, “A high-K ferroelectric relaxor terpolymer as a gate dielectric for organic thin film transistors,” Appl. Phys. Lett. 102, 013301 (2013).


  1. Y. Ma, K. Xiao, and R.W. Shaw, Exciton–Exciton Annihilation in Copper-phthalocyanine Single-Crystal Nanowires,” J. Phys. Chem. C 116, 21588−21593 (2012).
  2. K. Xiao, * M. Yoon, A. J. Rondinone, E. A. Payzant, and David B. Geohegan, “Understanding the Metal-Directed Growth of Single-Crystal M-TCNQF4 Organic Nanowires with Time-Resolved, in Situ X-ray Diffraction and First-Principles Theoretical Studies,” J. Am. Chem. Soc. 13414353 (2012) (highlighted on the cover page of the journal and selected as a spotlight article). *
  3. R. Hegde, N. Henry, B. Whittle, H. Zang, B. Hu, J. Chen, K. Xiao, M. Dadmun, “The impact of controlled solvent exposure on the morphology, structure and function of bulk heterojunction solar cells,” Solar Energy Materials and Solar Cells, 107112 (2012).
  4. P. Hu, Z. Wen, L. Wang, P. Tan, K. Xiao,* “Synthesis of Few-Layer GaSe Nanosheets for High Performance Photodetectors,” ACS Nano 6, 5988 (2012). *
  5. J. Chen, X. Yu, K. Hong, J. M. Messman, D. L. Pickel, K. Xiao, M. D. Dadmun, J. W. Mays, A. J. Rondinone, B. G. Sumpter, S. M. Kilbey II, “Ternary behavior and systematic nanoscale manipulation of domain structures in P3HT/PCBM/P3HT-b-PEO films,” J. Mater. Chem. 22, 13013 (2012).


  1. Z. He, K. Xiao, D. Durant, J. E. Anthony, K. Hong, S. M. Kilbey, II, J. Chen, and D. Li, “Enhanced Performance Consistency in Nanoparticle/TIPS Pentacene-Based Organic Thin Film Transistors,” Advanced Functional Materials 19, 3617 (2011).*
  2. L. Luo, C. Wilhelm, C. N. Young, C. P. Grey; G. P. Halada, K. Xiao, I. N. Ivanov, and J. Y. Howe, D. B. Geohegan, N. Goroff, “Characterization and Carbonization of Highly Oriented Poly(diiododiacetylene) Nanofibers,” Macromolecules 44, 2626 (2011).*
  3. Z. Sun; K. Xiao,* J. K. Keum, X. Yu, K. Hong, I. Ivanov, J. Chen, D. Li, B. Sumpter, A. Payzant, C. Rouleau, and D. B. Geohegan, PS-b-P3HT Copolymers as P3HT/PCBM Interfacial Compatibilizers for High Efficiency Photovoltaics,” Advanced Materials 23, 5529 (2011).*
  4. X. Yu, K. Xiao,* J. Chen, N. V. Lavrik, K. Hong, B. G. Sumpter, and D. B. Geohegan, “High-Performance Field-Effect Transistors Based on Polystyrene-b-Poly(3-hexylthiophene) Diblock Copolymers,” ACS Nano 5, 3559 (2011).*


  1. M. A. Schreuder, K. Xiao, I. N. Ivanov, S. M. Weiss, and S. J. Rossenthal, “White Light-Emitting Diodes Based on Ultrasmall CdSe Nanocrystal Electroluminescence,” Nano Letters 10, 573 (2010).*
  2. K. Xiao,* R. Li, J. Tao, E. A. Payzant, I. N. Ivanov, A. A. Puretzky, W. Hu, and D. B. Geohegan, “Metastable Copper-Phthalocyanine Single-Crystal Nanowires and Their Use in Fabricating High-Performance Field-Effect Transistors,” Advanced Functional Materials 19, 3776 (2009).*
  3. K. Xiao,*A. J. Rondinone, A. A. Puretzky, I. N. Ivanov, S. T. Retterer, and D. B. Geohegan, “Growth, Patterning, and One-Dimensional Electron-Transport Properties of Self-Assembled Ag-TCNQF(4) Organic Nanowires,” Chemistry of Materials 21, 4275 (2009).*
  4. R. Aggarwal, R. J. Narayan, K. Xiao, and D. B. Geohegan, “Fabrication of Ag-Tetracyanoquinodimethane Nanostructures Using Ink-jet Printing/Vapor-Solid Chemical Reaction Process,” Journal of Vacuum Science and Technology B 26(6), L48 (2008).
  5. Z. Liu, D. J. Styers-Barnett, A. A. Puretzky, C. M. Rouleau, D. Yuan, I. N. Ivanov, K. Xiao, and D. B. Geohegan, “Pulsed Laser CVD Investigations of Single-Wall Carbon Nanotube Growth Dynamics,” Applied Physics A 93, 987 (2008).
  6. K. Xiao*, J. Tao, A. A. Puretzky, I. N. Ivanov, S. T. Retterer, S. J. Pennycook and D. B. Geohegan, Selective Patterned Growth of Single-crystal Organic Nanowires of Ag-TCNQ by Vapor-Solid Chemical Reaction,” Advanced Functional Materials 18, 3043 (2008).*
  7. K. Xiao, Y. Fu, Y. Liu, G. Yu, J. Zhai, L. Jiang, W. Hu, Z. Shuai, Y. Luo, and D. Zhu, “Photo-Electrical Characteristic of C/CNx Multi-Walled Nanotube,” Advanced Functional Materials 17, 2842 (2007).*
  8. K. Xiao,* J. Tao, Z. Pan, A. A. Puretzky, I. N. Ivanov, S. J. Pennycook, and D. B. Geohegan, “Single-Crystal Organic Nanowires of Cu-TCNQ: Synthesis, Patterning, Characterization and Device Applications,” Angewandte Chemie International Edition 46, 2650 (2007).*
  9. Z. Zhou, K. Xiao, R. Jin, D. Mandrus, J. Tao, D. B. Geohegan, and S. Pennycook, “One-Dimensional Electron Transport in Cu-TCNQ Organic Nanowires,” Applied Physics Letters 90, 193115 (2007).*
  10. Y. Sun, Y. Ma, Y. Liu, Y. Lin, Z. Wang, Y. Wang, C. Di, K. Xiao, X. Chen, W. Qiu, B. Zhang, G. Yu, W. Hu, and D. Zhu, “High-Performance and Stable Organic Thin-Film Transistors Based on Fused Thiophenes,” Advanced Functional Materials 16, 426 (2006).*
  11. K. Xiao,* I. N. Ivanov, A. A. Puretzky, Z. Liu, and D. B. Geohegan, “Directed Integration of TCNQ-Cu Organic Nanowires Growth into Device Fabrication,” Advanced Materials 18, 2184 (2006).*
  12. K. Xiao, Y. Liu, P. Hu, G. Yu, W. Hu, D. Zhu, X. Liu, H. Liu, and D. Wu, “Electronic Transport Characteristics of an Individual CNx/C Nanotube Schottky Junction,” Applied Physics A: Materials Science & Processing 83, 53 (2006).
  13. Y. Sun, Y. Ma, Y. Liu, Y. Lin, Z. Wang, Y. Wang, C. Di, K. Xiao, X. Chen, W. Qiu, B. Zhang, G. Yu, W. Hu, and D. Zhu, “High-Performance and Stable Organic Thin-Film Transistors Based on Fused Thiophenes,” Advanced Functional Materials 16, 426 (2006).*
  14. W. Su, J. Jiang, K. Xiao, Y. Chen, Q. Zhao, G Yu, and Y. Liu, “Thin-Film Transistors Based on Langmuir-Blodgett Films of Heteroleptic Bis(phthalocyaninato) Rare Earth Complexes”, Langmuir 216527 (2005).
  15. Y. M. Sun, K. Xiao, Y. Q. Liu, J. Wang, J. Pei, G. Yu, and D. B. Zhu, “Oligothiophene-Functionalized Truxene: Star-Shaped Compounds for Organic Field-Effect Transistor,” Advanced Functional Materials 15, 818 (2005).*
  16. K. Xiao, Y. Liu, Y. G. Guo, G. Yu, L. Wan, and D. Zhu, “Influence of the Self-Assembly Monolayers on the Characteristics of Copper Phthalacyanine Thin Film Transistor,” Applied Physics A: Materials Science & Processing 80, 1541 (2005).
  17. K. Xiao, Y. Liu, T. Qi, W. Zhang, F. Wang, J. Gao, W. Qiu, Y. Ma, G. Cui, S. Chen, X. Zhan, G. Yu, J. Qin, W. Hu, and D. Zhu, “A Highly π-Stacked Organic Semiconductor for Field-Effect Transistors Based on Linearly Condensed Pentathienoacene,” Journal of the American Chemical Society 127, 13281 (2005).* (Top 20 papers published in 2004-2007, Thomson Science Watch; Time cited: 190)
  18. K. Xiao, Y. Q. Liu, P. A. Hu, G. Yu, Y. M. Sun, and D. B. Zhu, “n-Type Field-Effect Transistor Made of an Individual Nitrogen-Doped Multi-walled Carbon Nanotube,” Journal of the American Chemical Society 127, 8614 (2005).*
  19. P. Hu, K. Xiao, Y.Q. Liu, G. Yu, X.B. Wang, L. Fu, and D. B. Zhu, “Multi-Wall Nanotubes with Intratube Junctions (CNx/C): Preparation, Rectification, Logic Gates and their Application as a Wave-Detector in Transistor Radio Set”, Applied Physics Letter 84, 4932 (2004).* 
  20. L. Fu, Y. Liu, P. Hu, K. Xiao, G. Yu, and D. Zhu, “Ga2ONanoribbons: Synthesis, Characterization and Electronic Properties,” Chemistry of Materials 15, 4287 (2003).
  21. K. Xiao, Y. Q. Liu, P. A. Hu, G. Yu, X. B. Wang, and D. B. Zhu, “High-Mobility Thin-Film Transistors Based on Aligned Carbon Nanotubes,” Applied Physics Letters 83, 150 (2003).* Appears also in Virtual Journal of Nanoscale Science & Technology 8(2) (2003). (
  22. K. Xiao, Y. Q. Liu, X. B. Huang, Y. Xu, G. Yu, and D. B. Zhu, “Field-Effect Transistors Based on Langmuir-Blodgett Films of Phthalocyanine Derivatives as Semiconductor Layers,” Journal of Physical Chemistry B 107, 9226 (2003).* 
  23. K. Xiao, Y. Q. Liu, P. A. Hu, G. Yu, L. Fu, and D. B. Zhu, “High Performance Field-Effect Transistors made of Multiwall CNx/C Nanotube Intramolecular Junction,” Applied Physics Letters 83, 4824 (2003).* Appears also in Virtual Journal of Nanoscale Science & Technology 8(12), (2003)., (2003).
  24. K. Xiao, Y. Liu, G. Yu, and D. Zhu, “Influence of the Substrate Temperature During Deposition on Film Characteristics of Copper Phthalocyanine and Field-Effect Transistor Properties,” Applied Physics A: Materials Science & Processing 77, 367 (2003). 
  25. K. Xiao, Y. Q. Liu, G. Yu, and D. B. Zhu, “Organic Field-Effect Transistors Using Copper Phthalocyanine Thin Film,” Synthetic Metals 137, 991 (2003).
  26. X. B. Wang, Y. Q. Liu, P. A. Hu, G. Yu, K. Xiao, and D. B. Zhu, “Controllable Fabrication of Three-Dimensional Carbon Nanotube Alignments,” Advanced Materials 14(21), 557 (2002).*
  27. K. Xiao, Y. Q. Liu, G. Yu, and D. B. Zhu, “Organic Field-Effect Transistors,” Chinese Science Bulletin 47, 881 (2002). In Chinese
  28. K. Xiao, Y. G. Yan, L. C. Lei, Y. L. Du, “Application of Pd-Ag Alloy Diffusion Anode for Electrochemical Hydrogen Sensor,” Corrosion Science and Protection Technology 14, 125 (2002). *In Chinese
  29. L. C. Lei, K. Xiao, Y. Shen, X. Shi, Y. Gao, Y. L. Du, “Preparation and Characteristics of A Novel Imidazoline Inhibitor Made from Naphthenic Acid and Diethy-lenetriamine,” Corrosion and Protection 22, 420 (2001). *In Chinese
  30. K. Xiao, Y. G. Yan, L. C. Lei, and Y. L. Du, “Studies of Solid State Electrolyte Hydrogen Sensors,” Corrosion Science and Protection technology 13,165 (2001). *In Chinese
  31. J. R. Song, Z. X. Gong, M. B. Luo, and K. Xiao, “Study on the Performance of Adsorbing Uranium by Attapulgite Clay,” Journal of East China Geological Institute 21, 265 (1998). *In Chinese
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