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Dr. Gu Xu


Department of Materials Science and Engineering

Research Clusters:
JHE 357/A
+1 905.525.9140 x 27341


Research Areas Include:

Polymer Fuel Cells, Nanostructures and Organic Opto-electronics.

Current Research Projects:

  • Atomic Images of Nanostructures and Non-crystallizable systems.

  • Degradation of Organic Light Emitting Devices

  • Room Temperature Polymer Fuel Cells


M.Sc., Ph.D. Pittsburgh, D.E.S. Columbia, FCAE, LL



Selected Journal Publications
  • Chen, Jason Yuanzhe; Zhou, Qi; Xu, Gu; Wang, Ryan Taoran; Tai, Edward Guangqing; Xie, Longhan; Zhang, Qianzhi; Guan, Yanyan; Huang, Xiaochun. (2019). Non-invasive blood glucose measurement of 95% certainty by pressure regulated Mid-IR. TALANTA. 197: 211-217.

  • Xu, Alex Fan ;Wang, Ryan Taoran ;Yang, Lory Wenjuan; Jarvis, Victoria ; Britten, James F.; Xu, Gu. (2019). Pyrrolidinium lead iodide from crystallography: a new perovskite with low bandgap and good water resistance. CHEMICAL COMMUNICATIONS. 55: 3251-3253.
  • Xu, Gu; Li, Guifang; Li, Xianya; et al. Non-patchy strategy for inter-atomic distances from Extended X-ray Absorption Fine Structure, SCIENTIFIC REPORTS,  7, 42143 (2017).

  • Zhao, Cindy X. and Mao, Alice Y. and Xu, Gu, Junction capacitance and donor-acceptor interface of organic photovoltaics. APPLIED PHYSICS LETTERS. 105: 063302 (2014).

  • Zhao, Cindy X. and Deng, Lucy L. and Ma, Matthew Y. and Kish, Joseph R.and Xu, G. Multipleinterface tracking of degradation process in organic photovoltaic. AIP ADVANCES. 3(10): 102121 (2013).

  • Ma, Yiqun; Zhao, Cindy X.; Deng, Lucy L.; Xu Gu, Transition of pore-size dependence of ion diffusivity in dye-sensitized solar cells, ELECTROCHIMICA ACTA, 102, 127-132 (2013).

  • Yan, Han; Zhao, Cindy; Wang, Kevin; Xu Gu, Negative dielectric constant manifested by static electricity, APPLIED PHYSICS LETTERS, 102, 062904 (2013).

  • Deng, Lucy L.; Zhao, Cindy X.; Ma, Yiqun; Xu Gu, Low cost acetone sensors with selectivity over water vapour based on screen printed TiO2 nanoparticles, ANALYTICAL METHODS, 5, 3709-3713 (2013).

  • Britten James; Feng Zhechuan; Xu Gu, Magnified hard x-ray image in one dimension, APPLIED PHYSICS LETTERS Volume: 96 Issue: 26 Article Number: 261907 (2010).

  • Wang Kevin K.; Yan Han; Zhao Cindy X. Qi Y, Hu N.X. and Xu G. Direct Method of Tracing the Wetting States on Nanocomposite Surfaces, LANGMUIR Volume: 26 Issue: 11 Pages: 7686-7689 (2010).

  • Klenkler RA, Aziz H, Tran A, Popovic ZD, Xu G, “High electron mobility triazine for lower driving voltage and higher efficiency organic light emitting devices”, ORGANIC ELECTRONICS Volume: 9 Issue: 3 Pages: 285-290 (2008).

  • Pan HL, Li YN , Wu YL , Liu P , Ong BS , Zhu SP, Xu G, “Low-temperature, solution-processed, high-mobility polymer semiconductors for thin-film transistors”, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 129 (14): 4112+, APR 11 (2007).

  • Y.C. Luo, H. Aziz, G. Xu, and Z.D. Popovic “Similar roles of electrons and holes in luminescence degradation of organic light-emitting devices”, CHEMISTRY OF MATERIALS 19 (8): 2079-2083, APR 17 (2007).

  • Wei Tang, Huazhong Shi, Gu Xu, Beng S. Ong, Zoran D. Popovic, Jiachun Deng, Jie Zhao and Guanghui Rao, “Memory Effect and Negative Differential Resistance by Electrode-induced 2-dimensional Single-Electron Tunneling in molecular and organic electronic devices”, Advanced Materials, 17, 2307-2311 (2005).

  • Jeremy Lawrence and Gu Xu, “High pressure saturation of hydrogen stored by single-wall carbon nanotubes”, Appl. Phys. Lett., 84 (6), 918-20 (2004).

  • Ales Horky, Nazir P. Kherani, and Gu Xu, “Conductivity and Transport Properties of Aqueous Phosphotungstic and Silicotungstic Acid Electrolytes for Room Temperature Fuel Cells”, J. Electrochem Society, 150 (9), A1219-A1224 (2003).

  • S. Jiang, K.Q. Xia and G. Xu, “The Effect of Additives on Self-Assembling Behaviour of Nafion in Aqueous Media”, Macromolecules, 34, 7783-88 (2001).

  • G. Xu, Z.C. Feng, Z. Popovic, J.Y. Lin and J.J. Vittal, “Nanotube Structure Revealed by X-ray Diffraction”, Advanced Materials, 13, 264-7 (2001)..

  • G. Xu and Z.C. Feng, “Atomic Layer Distortion of Epitaxial SiC Thin Films Studied by Short Wavelength X-ray”, Phys. Rev. Lett. V84, p.1926-29, (2000).

  • Y.F. Liew, H. Aziz, N.X. Hu, H.S.O. Chan, G. Xu and Z. Popovic, “Investigation of the Sites of Dark Spots in Organic Light Emitting Devices”, Appl. Phys. Lett. 77, 2650-52 (2000).

  • Hany Aziz, Zoran D.Popovic, Nan-Xing Hu, Ah-Mee Hor, and Gu Xu, “Degradation Mechanism of Small Molecule-Based Organic Light Emitting Devices”, Science, V.283,p.1900-2, (1999).

  • P.Y. chow, C.L. Ong, L.M. Gan, C.H. Chew, J. Wang and G. Xu, “Ion-Containing Membranes from Microemulsion Polymerization”, Langmuir, 15(9); 3202-3205 (1999).

  • G. Xu, G.E. Zhou and X.Y. Zhang, “Phase Recovery for X-ray Crystallography”, Phys.Rev.B, V59,9044-7 (1999).

  • H. Aziz, Z. Popovic, C. Tripp, N. Hu, A. Hor and G. Xu, “Degradation Processes at the Cathode/Alq3 Interface in Organic Light Emitting Devices with Mg:Ag Cathodes”, Appl. Phys. Lett. V72, 2642-4 (1998).

  • X. Lu, G. Xu, P.G. Hofstra and R. C. Bajcar, “Moisture sorption, dielectric loss and thermal conduction studies of polymer composites”, J. Polymer Sci. B., V36, 2259-65 (1998).

  • H. Aziz and G. Xu, “Electric-field-induced degradation of poly (p-phenylene vinylene) electroluminescent devices”, J. Phys. Chem. B, 101 (1997) 4009-12