Recent peer-reviewed publications and invited reviews:
- Chun Cheng, Kai Liu, Bin Xiang, Joonki Suh, and Junqiao Wu, Ultra-long, Ultra-dense, Free-standing, Single-Crystalline Vanadium Dioxide Micro/ Nanowires Grown by Simple Thermal Evaporation, submitted, (2012).
- Kai Liu, Deyi Fu, Jinbo Cao, Joonki Suh, Kevin X. Wang, Shamashis Sengupta, Asif Khan, Sayeef Salahuddin, Mandar M. Deshmukh and Junqiao Wu, Ultra-Dense, Ultra-Thin Electron System from Gate-Controlled Surface Metal-Insulator Transition, submitted, (2012).
- 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, in press (2012).
- 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., in press (2012).
- J. Zhou, N. Tamura, Y. H. Chu, R. Ramesh, and J. Wu, et al, Electric Field Directed Nanoscale Phase Domain Assembly in Strain Engineered BiFeO3; to be submitted, (2012).
- 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:
- 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, H. Lu, W. Schaff, et. al.; Unusual Properties of the Fundamental Bandgap of InN; Appl. Phys. Lett., 80, 3967 (2002). Received 800+ citations.
- J. Wu, W. Walukiewicz, H. Lu, W. Schaff, et. al.; Small Bandgap Bowing in InxGa1-xN Alloys; Appl. Phys. Lett., 90, 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).
