Recent peer-reviewed publications and invited reviews:
- Sefaattin Tongay*, Joonki Suh*, Can Ataca, Fan Wen, Alexander Luce, Jeong Seuk Kang, Jonathan Liu, Changhyun Ko, Jian Zhou, Jingbo Li, Jeffrey C. Grossman and Junqiao Wu, Defects activated photoluminescence in two-dimensional semiconductors: interplay between bound, charged, and free excitons, submitted, (2013).
- Sefaattin Tongay, Wen Fan, Jun Kang, Can Ataca, Jian Zhou, Shu-Shen Li, Jeffrey Grossman, Jingbo Li, Junqiao Wu, Modulating electron-phonon coupling in monolayer semiconductors by inert gas molecules, submitted, (2013).
- C. L. Hsin*, M. C. Wingert*, C. W. Huang, H. Guo, H.S. Teng, J. Suh, K. Wang, J. Wu, W. W. Wu, R. Chen, Phase Transformation and Thermoelectric Properties of Bismuth-Telluride Nanowires, Nanoscale, in press (2013). (PDF)
- J. Kang, S. Tongay, J. Li and J. Wu, Two-dimensional Semiconductor Alloys: Stability and Band Bowing, J. Appl. Phys., 113, 143703 (2013). (PDF)
- H. Sahin, S. Tongay, S. Horzum, W. Fan, J. Zhou, J. Li, J. Wu, and F. M. Peeters, Anomalous Raman Spectrum and Dimensionality Effects in WSe2, Phys. Rev. B, 87, 165409 (2013). (PDF)
- Hua Guo, Kevin Wang, Yu Deng, Y. Oh, S. A. Syed Asif, O. L. Warren, Z. W. Shan, J. Wu and A. M. Minor, In-situ nanomechanical response of phase transition in individual VO2 nanowires, submitted, (2013).
- Xiuqing Meng, Sefaattin Tongay, Jun Kang, Zhanghui Chen, Fengmin Wu, Shu-Shen Li, Jian-Bai Xia, Jingbo Li and Junqiao Wu, Stable p- and n-type doping of few-layer graphene/graphite, Carbon, 57, 507 (2013). (PDF)
- Sefaattin Tongay, Jian Zhou, Can Ataca, Jonathan Liu, Jeong Seuk Kang, Tyler S. Matthews, Long You, Jingbo Li, Jeffrey C. Grossman and Junqiao Wu, Broad-range modulation of light emission in two-dimensional semiconductors by molecular physi-sorption gating, Nano Lett., in press (2013).
- Sangwook Lee, Chun Cheng, Hua Guo, Kedar Hippalgaonkar, Kevin Wang, Joonki Suh, Kai Liu, and Junqiao Wu, Axially Engineered Metal-Insulator Phase Transition by Graded Doping VO2 Nanowires, J. Am. Chem. Soc., 135, 4850 (2013). (PDF)
- Jia Zhu, Kedar Hippalgaonkar, Sheng Shen, Kevin Wang, Junqiao Wu, Xiaobo Yin, Arun Majumdar and Xiang Zhang, Temperature Gated Thermal Rectifier, submitted, (2013).
- Deyi Fu*, Kai Liu*, Tao Tao, Kelvin Lo, Chun Cheng, Bin Liu, Rong Zhang, Hans Bechtel, Junqiao Wu, Comprehensive Study of the Metal-Insulator Transition in Pulsed Laser Deposited Epitaxial VO2 Thin Films, J. Appl. Phys., 113, 043707 (2013). (PDF)
- Kevin X. Wang, Chun Cheng, Edy Cardona, Jingyang Guan, Kai Liu, Junqiao Wu, Performance limits of micro-actuation with vanadium dioxide as a solid engine, ACS Nano, 7, 2266 (2013). (PDF)
- Jun Kang, Sefaattin Tongay, Jian Zhou, Jingbo Li, and Junqiao Wu, Band offsets and Heterostructures of Two-Dimensional Semiconductors, Appl. Phys. Lett., 102, 012111 (2013). (PDF)
- T. Tong, D. Fu, A. X. Levander, W. J. Schaff, B. N. Pantha, B. Liu, R. Zhang, J. Y. Lin, H. X. Jiang, J. Wu, and David. G. Cahill, Suppression of thermal conductivity in InxGa1-xN alloys by cation substitution and nanometer-scale disorder, Appl. Phys. Lett., 102, 121906 (2013). (PDF)
- Kai Liu, Chun Cheng, Zhenting Cheng, Kevin Wang, Ramamoorthy Ramesh, Junqiao Wu, Giant-Amplitude, High-Work Density Microactuators with Phase Transition Activated Nanolayer Bimorphs, Nano Lett., 12, 6302 (2012). (PDF)
- Sefaattin Tongay, Jian Zhou, Can Ataca, Kelvin Lo, Jingbo Li, Jeffrey C. Grossman, and Junqiao Wu, Thermally driven crossover from indirect toward direct bandgap in 2D semiconductors: MoSe2 versus MoS2, Nano Lett., 12, 5576 (2012). (PDF) Also highlighted by Nature Nanotechnology.
- Zhensheng Tao, Tzong-Ru T. Han, Subhendra D. Mahanti, Phillip M. Duxbury, Fei Yuan, Chong-Yu Ruan*, Kevin Wang and Junqiao Wu, Decoupling of structural and electronic phase transitions in VO2, Phys. Rev. Lett., 109, 166406 (2012).(PDF)
- Sefaattin Tongay, Sima S. Varnoosfaderan, Bill R. Appleton, Junqiao Wu and Arthur F. Hebard, Magnetic Properties of MoS2: Existence of Ferromagnetism, Appl. Phys. Lett., 101, 123105 (2012).(PDF).
- Chun Cheng, Kai Liu, Bin Xiang, Joonki Suh, and Junqiao Wu, Ultra-long, Free-standing, Single-Crystalline Vanadium Dioxide Micro/ Nanowires Grown by Simple Thermal Evaporation, Appl. Phys. Lett., 100, 103111 (2012). (PDF).
- Kai Liu, Deyi Fu, Jinbo Cao, Joonki Suh, Kevin X. Wang, Chun Cheng, D. F. Ogletree, Hua Guo, Shamashis Sengupta, Asif Khan, Chun Wing Yeung, Sayeef Salahuddin, Mandar M. Deshmukh, Junqiao Wu, Dense Electron System from Gate-Controlled Surface Metal-Insulator Transition, Nano Lett., 12, 6272 (2012). (PDF)
- C. Miller, M. Triplett, J. Lammatao, J. Suh, D. Fu, J. Wu and D. Yu, Unusually Long Minority Carrier Lifetime and Metal-Insulator Band Offset in Vanadium Dioxide, Phys. Rev. B, 85, 085111 (2012). Highlighted as "Editor's Suggestion". (PDF).
- T. S. Matthews, C. Sawyer, D. F. Ogletree, Z. Liliental-Weber, D. C. Chrzan, and J. Wu, Large Reaction Rate Enhancement in Formation of Ultra-Thin AuSi Eutectic Layer, Phys. Rev. Lett., 108, 096102 (2012). (PDF)
- Jian Zhou, Morgan Trassin, Qing He, Nobumichi Tamura, Martin Kunz, Chun Cheng, Jinxing Zhang, Wen-I Liang, Jan Seidel, Cheng-Lun Hsin, and Junqiao Wu, Directed Assembly of Nano-scale Phase Variants in Highly Strained BiFeO3 Thin Films; J. Appl. Phys., 112, 064102 (2012). (PDF)
- J. M. Atkin, S. Berweger, E. Chavez, M. B. Raschke, J. Cao, W. Fan, J. Wu, Strain and temperature dependence of the insulating phases of VO2 near the metal-insulator transition; Phys. Rev. B, Rapid Commun., 85, 020101 (2012). (PDF)
- Chun Cheng, Wen Fan, Jinbo Cao, Sang-Gil Ryu, Jie Ji, Costas P. Grigoropoulos, and Junqiao Wu, Heat Transfer across the Interface between Nanoscale Solids and Gas, ACS Nano, 5, 10102 (2011). (PDF)
- A. X. Levander, S. V. Novikov, Z. Liliental-Weber, R. dos Reis, O. D. Dubon, J. Wu, C. T. Foxon, K. M. Yu, and W. Walukiewicz, Bipolar Doping of Mixed Phase GaN1-xAsx with High As content, J. Appl. Phys., 110, 093702 (2011). (PDF)
- A. X. Levander, S. V. Novikov, Z. Liliental-Weber, R. dos Reis, J. Denlinger, J. Wu, O. D. Dubon, C. T. Foxon, K. M. Yu, W. Walukiewicz, Growth and Transport Properties of p-type GaNBi Alloys, J. Mater. Res., 26, 2887 (2011). Invited Feature Article. (PDF)
- J. Yim, C. P. Grigoropoulos, and J. Wu, Mismatched Alloy Nanowires for Electronic Structure Tuning; Appl. Phys. Lett., 99, 233111(2011). (PDF)
- S. Sengupta, K. X. Wang, K. Liu, J. Wu, and M. Deshmukh, Field-effect modulation of conductance in VO2 transistors with HfO2 as gate dielectric; Appl. Phys. Lett., 99, 062114 (2011). (PDF)
- D. Fu, J. Zou, K. Wang, R. Zhang, D. Yu and J. Wu, Electrothermal Dynamics of Semiconductor Nanowires under Local Carrier Modulation; Nano Lett., 11, 3809 (2011). (PDF)
- Jan Seidel, Deyi Fu, Seung-Yeul Yang, Esther Alarcon-Llado, J. Wu, R. Ramesh, and J. W. Ager III, Efficient photovoltaic current generation at ferroelectric domain walls; Phys. Rev. Lett., 107, 126805 (2011). (PDF)
- Hua Guo*, Kai Chen*, Y. Oh, Kevin Wang, Catherine Dejoie, S.A. Syed Asif, O.L. Warren, Z. W. Shan, J. Wu and A.M. Minor, Mechanics and dynamics of the strain-induced M1-M2 structural phase transition in individual VO2 nanowires; Nano Lett., 11, 3207 (2011). (PDF)
- D. R. Khanal, A. X. Levander, K. M. Yu, Z. Liliental-Weber, J. Grandal, E. Calleja, and J. Wu, Decoupling Nanowire Mobilities Limited by Surface Scattering and Bulk Impurity Scattering; J. Appl. Phys., 110, 033705 (2011). (PDF)
- J. Wu, J. Cao, W. Q. Han, H.-C. Kim, A. Janotti, Ed., Functional Metal Oxide Nanostructures, Book published by Springer (2011). (Cover)
- A. X. Levander, Z. Liliental-Weber, M.E. Hawkridge, R. Broesler, S. V. Novikov, C. T. Foxon, O. D. Dubon, J. Wu, W. Walukiewicz, and K. M. Yu, Thermal Stability of Amorphous GaN1-xAsx Alloys; Appl. Phys. Lett., 98, 161902 (2011). (PDF)
- W. Fan*, J. Cao*, J. Seidel, Y. Gu, J. W. Yim, C. Barrett, K. M. Yu, J. Ji, R. Ramesh, L. Q. Chen and J. Wu, Large Kinetic Asymmetry in Twin Wall-Mediated Metal-Insulator Phase Transition; Phys. Rev. B, 83, 235102 (2011). Highlighted as "Editor's Suggestion". (PDF)
- A. X. Levander, T. Tong, K. M. Yu, J. Suh, D. Fu, R. Zhang, H. Lu, W. J. Schaff, O. Dubon, W. Walukiewicz, D. G. Cahill, and J. Wu, Effects of point defects on thermal and thermoelectric properties of InN; Appl. Phys. Lett., 98, 012108 (2011). (PDF)
- D. Fu, A. X. Levander, R. Zhang, J. W. Ager III and J. Wu, Electrothermally Driven Current Vortices in Inhomogeneous Bipolar Semiconductors; Phys. Rev. B, 84, 045205 (2011). Selected by APS as a featured story at "Physical Review Focus". (PDF)
- W. T. Liu, J. Cao, W. Fan, H. Zhao, M. C. Martin, J. Wu, and F. Wang, Intrinsic Infrared Properties of Vanadium Dioxide near the Insulator-Metal Transition; Nano Lett. 11, 466 (2011). (PDF)
- J. Cao and J. Wu, Strain Effects in Low-Dimensional Transition Metal Oxides; invited review, Materials Science and Engineering: R: Reports , 71, 35 (2011) (PDF)
- K. M. Yu, S. V. Novikov, R. Broesler, Z. Liliental-Weber, A. X. Levander, V. M. Kao, O. D. Dubon, J. Wu, W. Walukiewicz, and C. T. Foxon, Low-Gap Amorphous GaN1-xAsx Alloys Grown on Glass Substrate; Appl. Phys. Lett., 97, 101906 (2010). (PDF)
- J. Cao, Wen Fan, Qin Zhou, Erica Sheu, Aiwen Liu, C. Barrett, and J. Wu, Colossal Thermal-Mechanical Actuation via Phase Transition in VO2 Microcantilevers; J. Appl. Phys., 108, 083538(2010). (PDF)
- A. X. Levander, K. M. Yu, S. V. Novikov, A. Tseng, C. T. Foxon, O. D. Dubon, J. Wu and W.Walukiewicz, GaN1-xBix: Extremely Mismatched Semiconductor Alloys; Appl. Phys. Lett., 97, 141919 (2010). (PDF)
- Y. Gu, J. Cao, J. Wu, and Long-Qing Chen, Thermodynamics of strained vanadium dioxide single crystals; J. Appl. Phys., 108, 083517(2010). (PDF)
- J. Cao, Y. Gu, W. Fan, L. Q. Chen, D. F. Ogletree, K. Chen, N. Tamura, M. Kunz, C. Barrett, J. Seidel, and J. Wu, Extended Mapping and Exploration of the Vanadium Dioxide Stress-Temperature Phase Diagram; Nano Lett. 10, 2667 (2010). (PDF)
- G. F. Brown, J. W. Ager III, W. Walukiewicz and J. Wu, Finite Element Simulations of Compositionally Graded InGaN Solar Cells; Solar Energy Mater. & Solar Cells, 94, 478 (2010). (PDF)
- J.-H. Lee, J. Wu, and J. C. Grossman, Enhancing thermoelectric power factor with highly mismatched isoelectronic doping; Phys. Rev. Lett., 104, 016602 (2010) (PDF)
- G. F. Brown, V. Faifer, A. Pudov, S. Anikeev, E. Bykov, M. Contreras and J. Wu, Determination of the minority carrier diffusion length in compositionally graded Cu(In,Ga)Se2 solar cells using electron beam induced current; Appl. Phys. Lett. , 96, 022104 (2010). (PDF)
- J. Cao, W. Fan, K. Chen, N. Tamura, M. Kunz, V. Eyert and J. Wu, Constant threshold resistivity in the metal-insulator transition of VO2; Phys. Rev. B, Rapid Commun. , 82, 241101 (2010) (PDF)
- W. Fan, S. Huang, J. Cao, E. Ertekin, C. Barrett, D. R. Khanal, J. C. Grossman and J. Wu, Superelastic Metal-Insulator Phase Transition in Single-Crystal Vanadium Dioxide Nanobeams; Phys. Rev. B, Rapid Commun., 80, 241105(R) (2009). (PDF)
- J. W. L. Yim, D. Chen, G. F. Brown and J. Wu, Synthesis and ex-situ doping of ZnTe and ZnSe nanostructures with extreme aspect ratios; Nano Research, 2, 931 (2009). (PDF)
- D. R. Khanal, W. Walukiewicz, J. Grandal, E. Calleja, and J. Wu, Determining surface Fermi level pinning position of InN nanowires using electrolyte gating; Appl. Phys. Lett., 95, 173114 (2009). (PDF)
- J. Cao, E. Ertekin, V. Srinivasan, W. Fan, S. Huang, H. Zheng, J. W. L. Yim, D. R. Khanal, D. F. Ogletree, J. C. Grossman, and J. Wu, Strain engineering and one-dimensional organization of metal-insulator domains in single-crystal VO2 beams; Nature Nanotech., 4, 732 (2009). (cover highlight) (PDF)
- J. W. L. Yim, B. Xiang, and J. Wu, Sublimation of GeTe nanowires and evidence of its size effect studied by in situ TEM; J. Am. Chem. Soc., 131, 14526 (2009). (PDF)
- J. Cao*, W. Fan*, H. Zheng, and J. Wu, Thermoelectric Effect across the Metal-Insulator Domain Walls in VO2 Microbeams; Nano Lett., 9, 4001 (2009). (PDF)
- E. C. Garnett, Y. Tseng, D. R. Khanal, J. Wu, J. Bokor and P. Yang, Dopant Profiling and Surface Analysis of Silicon Nanowires Using Capacitance-Voltage Measurements, Nature Nanotech., 4, 311 (2009). (PDF)
- J. Wu, When Group III - Nitrides Go Infrared: New Properties and Perspectives; invited review, J. Appl. Phys., 106, 011101 (2009). (cover highlight) (PDF)
- G. F. Brown and J. Wu, Third Generation Photovoltaics; Laser and Photonics Reviews, 3, 394 (2009). (PDF)
- Z. Liliental-Weber, K. M. Yu, M. Hawkridge, S. Bedair, A.E. Berman, A. Emara, D. R. Khanal, J. Wu, J. Domagala, and J. Bak-Misiuk, Structural perfection of InGaN layers
and its relation to photoluminescence; phys. stat. sol. (c) , 6, 2626 (2009). (PDF)
- J. W. Ager III, N. Miller, R. E. Jones, K. M. Yu, J. Wu, W. J. Schaff, and W. Walukiewicz, Mg-doped InN and InGaN - photoluminescence, capacitance-voltage and thermopower measurements; phys. stat. sol. (b) , 245, 873 (2008). (PDF)
- G. F. Brown, J. W. Ager, W. Walukiewicz, W. J. Schaff and J. Wu, Probing and Modulating Surface Electron Accumulation in InN by the Electrolyte Gated Hall Effect; Appl. Phys. Lett., 93, 262105 (2008). (PDF)
- J. W. L. Yim and J. Wu, Optical Properties of InN and Related Alloys; Book Chapter, Indium Nitride and Related Alloys, Edited by T. D. Veal, C. F. McConville and W. J. Schaff, Taylor & Francis (2008).
- D. R. Khanal and J. Wu, Gate Coupling and Charge Distribution in Nanowire Field Effect Transistors; Nano Lett., 7, 2778 (2007). (PDF)
- J. W. L. Yim, R. E. Jones, K. M. Yu, J. W. Ager III, W. Walukiewicz, W. J. Schaff and J. Wu, Effects of Surface States on Electrical Characteristics of InN and InGaN; Phys. Rev. B, Rapid Commun.. 76, 041303(R) (2007). (PDF)
- D. R. Khanal, Joanne W. L. Yim, W. Walukiewicz and J. Wu, Effects of Quantum Confinement on the Doping Limit of Semiconductor Nanowires; Nano Lett., 7, 1186 (2007). (PDF)
- K. Alberi, J. Wu, W. Walukiewicz, K. M. Yu. O. D. Dubon, S. P. Watkins, C. X. Wang, X. Liu, Y. J. Cho and J. Furdyna; Valence-Band Anticrossing in Mismatched III-V Semiconductor Alloys; Phys. Rev. B, 75, 045203 (2007). (PDF)
Conference proceedings and posters:
- We attend and present at MRS, APS, ACS, ICPS, and other conferences.
Patents:
- K. Liu, K. X. Wang and J. Wu, Vanadium Dioxide Micro Actuators, US patent filed (2012).
- W. Walukiewicz, K. M. Yu, J. Wu and W. J. Schaff, Broad Spectrum Solar Cells, US patent 7217882.
- W. Walukiewicz, K. M. Yu and J. Wu, Multiband Semiconductors for High-Efficiency Solar Cells, US patent 7709728.
Selected previous publications:
- J. Wu, Q. Gu, B. S. Guiton, L. Ouyang, N. de Leon, H. Park;
Strain-induced Self Organization of Metal-Insulator Domains in
Single-Crystalline VO2 nanobeams; Nano Lett., 6, 2313 (2006).(PDF)
- Q. Gu, A. Falk, J. Wu, L. Ouyang and H. Park; Current-Driven Phase Oscillation and Domain-Wall Propagation in WxV1-xO2 Nanobeams; Nano Lett., 7, 363 (2007).(PDF)
- D. Yu, J. Wu, Q. Gu and H. Park; Germanium Telluride Nanowires and Nanohelices with Memory Switching Behavior; J. Am. Chem. Soc., 128, 8148(2006).
- J. Wu, W. Walukiewicz, W. Shan, et. al.; Structure-Dependent
Hydrostatic Deformation Potentials of Individual Single-Walled Carbon
Nanotubes; Phys. Rev. Lett., 93, 017404 (2004).
- J. Wu, W. Q. Han, W. Walukiewicz, et. al.; Raman Spectroscopy and Time-resolved Photoluminescence of BN and BCN Nanotubes; Nano Lett., 4, 647 (2004).
- K. M. Yu, W. Walukiewicz, J. Wu, et. al.; Diluted II-VI Oxide
Semiconductors with Multiple Band Gaps; Phys. Rev. Lett., 91, 246403
(2003). Led to a Multiband Solar Cell patent.
- J. Wu, W. Walukiewicz, K. M. Yu, et. al.; Superior Radiation
Resistance of In1-xGaxN Alloys: a Full-Solar-Spectrum Photovoltaic
Materials System; J. Appl. Phys., 94, 6477 (2003). Led to a Broad
Band Solar Cell patent.
- H. T. Ng, B. Chen, J. Li, J. E. Han, M. Meyyappan, J. Wu, S. X. Li and E. E. Haller; Optical properties of single-crystalline ZnO nanowires on m-sapphire; Appl. Phys. Lett., 82, 2023 (2003).
- J. Wu, W. Walukiewicz, E. E. Haller; Band structure of highly mismatched semiconductor alloys: Coherent potential approximation; Phys. Rev. B, 65,
233210 (2002).
- J. Wu, W. Walukiewicz, K. M. Yu, et. al.; Effects of the Narrow
Bandgap on the Properties of InN; Phys. Rev. B, Rapid Commun., 66,
201403 (2002).
- K. M. Yu, W. Walukiewicz, J. Wu, et. al.; Mutual Passivation of
Electrically Active and Isoelectronic Impurities: Si doped GaNxAs1-x;
Nature Mater., 1(3), 185 (2002).
- J. Wu, W. Walukiewicz, K. M. Yu, J. W. Ager, E. E. Haller, H. Lu, W. J. Schaff, Y. Saito, and Y. Nanishi; Unusual Properties of the Fundamental Bandgap of InN; Appl. Phys. Lett., 80, 3967 (2002). Received 1000+ citations, and is among the top 50 cited papers in Appl. Phys. Lett.'s 50 years of history.
- J. Wu, W. Walukiewicz, H. Lu, W. Schaff, et. al.; Small Bandgap Bowing in InxGa1-xN Alloys; Appl. Phys. Lett., 80, 4741 (2002).
- J. Wu and W. Walukiewicz; Band Gaps of InN and group III Nitride
Alloys; invited review, Superlatt. and Microstruct., 34, 63(2003).
- J. Wu, W. Shan and W. Walukiewicz; Band Anticrossing Effects in
Highly Mismatched Semiconductor Alloys; invited review, Semicond.
Sci. Tech., 17, 860 (2002).
- W. Walukiewicz, W. Shan, J. Wu and K. M. Yu; Band Anticrossing in III-N-V Alloys: Theory and Experiments; book chapter, Physics and Applications of Dilute Nitrides, edited by I. A. Buyanova and W. M. Chen, Taylor & Francis, New York, (2003).
