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Dr. SHEN, Yaogen

Photo of Dr. SHEN

Associate Professor


PhD(Newcastle), PDF(Western Ontario), MAVS(USA)

Email: meshen@cityu.edu.hk

Research Interests: Nano-structured Materials, Thin Films and Nano-multilayers, Nanoscale Modeling and Simulation

Dr Shen, a Zhejiang University graduate, received his PhD in materials science from University of Newcastle in 1991 and was a Postdoctoral Fellow in surface science at University of Western Ontario, Canada from 1991 to 1992. Currently he is an Associate Professor in the Department of Manufacturing Engineering & Engineering Management, City University of Hong Kong. He was also a visiting Scientist at University of Bonn, Germany in 1995 and at Nanyang Technological University of Singapore in 1999. Dr Shen has extensive research experience in the areas of nanostructured materials, thin films, nanocomposites, multi-layers, surface and interface characterization, nanoscale modeling and simulation. His current research activities are mainly focused on three major topics: (i) mechanical, structural, and tribological properties of thin films (metals, alloys, nitrides, carbides, and oxides) and nano-multilayers, (ii) fabrication and characterization of advanced superhard nanocomposite materials, and (iii) nanoscale modeling and simulation. He has published more than 180 papers including ~120 SCI journal and ~60 conference publications.


Selected Recent SCI Papers

  1. X.J. Hu, Z.-J. Liu, and Y.G. Shen, Mechanisms of Amorphous-Phase-Dependent Grain Growth in Two-phase Nanocomposite Films: A Monte Carlo Analysis, Applied Physics Letters 92 (2), Article Number: 021910 (2008).


  2. Y.H. Lu and Y.G. Shen, Effect of Carbon Content on Thermal Stability of Ti-Cx-Ny Thin Films, Journal of Materials Research 23 (3), 671-678 (2008).


  3. C. Lu, Y.-W. Mai, P.L. Tam, and Y.G. Shen, Nanoindentation-induced Elastic-plastic Transition and Size Effect in -Al2O3(0001), Philosophical Magazine Letters 87 (6), 409-415 (2007).


  4. Y.H. Lu and Y.G. Shen, Nanostructure Transition: from Solid Solution Ti(N,C) to Nanocomposite nc-Ti(N,C)/a-(C, CNx), Applied Physics Letters 90 (22), Article Number: 221913 (2007).


  5. Y.H. Lu, Y.G. Shen, J.P. Wang, Z.F. Zhou, and K.Y. Li, Structure and Hardness of Unbalanced Magnetron Sputtered TiBxNy Thin Films Deposited at 500 ºC, Surface & Coatings Technology 201 (16-17), 7368-7374 (2007).


  6. Y.H. Lu and Y.G. Shen, Nanostructure Evolution and Properties of Two-phase nc-Ti(C, N)/a-(C, CNx) Nanocomposites by High-resolution Transmission Electron Microscopy, X-ray Photoelectron Spectroscopy, and Raman Spectroscopy, Journal of Materials Research 22 (9), 2460-2469 (2007).


  7. S. Wang, R. Gudipati, A.S. Rao, T.J. Bostelman, and Y.G. Shen, First-principles Calculations for the Elastic Properties of Nanostructured Superhard TiN/SixNy Superlattices, Applied Physics Letters 91 (8), Article Number: 081916 (2007).


  8. Z.-J. Liu, Y.H. Lu, and Y.G. Shen, Grain Growth in Nanocomposite Ti-B-N Films during Deposition: the Effect of Amorphous Phase Precipitation, Journal of Materials Research 21 (1), 82-87 (2006).


  9. Z.-J. Liu and Y.G. Shen, Effects of Al Content on Grain Growth of Solid Solution (Ti,Al)N Films, Journal of Vacuum Science and Technology A 24 (1), 174-177 (2006).


  10. Z.-J. Liu, P.W. Shum, and Y.G. Shen, Surface Growth of (Ti,Al)N Thin Films on Smooth and Rough Substrates, Thin Solid Films 496 (2), 326-332 (2006).


  11. C. Lu, Y.-W. Mai, and Y.G. Shen, Recent Advances on Understanding the Origin of Superhardness in Nanocomposite Coatings: A Critical Review, Journal of Materials Science 41(3), 937-950 (2006).


  12. Y.H. Lu, Y.G. Shen, Z.F. Zhou, and K.Y. Li, Effects of Nitrogen Content on Microstructure and Oxidation Behaviors of Ti-B-N Nanocomposite Thin Films, Journal of Vacuum Science and Technology A 24 (2), 340-349 (2006).


  13. Y.H. Lu, Z.-J. Liu and Y.G. Shen, Investigation of Nanostructure Evolution and Twinning of Nanocrystallites in Ti-Bx-Ny Nanocomposite Thin Films Deposited by Magnetron Sputtering at Low Temperature by Means of HRTEM and Monte Carlo Simulation, Acta Materialia 54 (11), 2897-2905 (2006).


  14. K. Chu, P.W. Shum, and Y.G. Shen, Substrate Bias Effects on Mechanical and Tribological Properties of Substitutional Solid Solution (Ti, Al)N Films Prepared by Reactive Magnetron Sputtering , Materials Science and Engineering B 131 (1-3), 62-71 (2006).


  15. K. Chu, Z.-J. Liu, Y.H. Lu, and Y.G. Shen, Atomic Force Microscopy Study of Growth Kinetics: Scaling in TiN-TiB2 Nanocomposite Films on Si(100), Applied Surface Science 252 (23), 8091-8095 (2006).


  16. Z.-J. Liu and Y.G. Shen, Temperature-dependent Morphology Evolution of the Submonolayer Clusters Grown on Metal (110) Surfaces, Journal of Vacuum Science and Technology A 23 (1), 177-183 (2005).


  17. Z.-J. Liu, A. Vyas, Y.H. Lu, and Y.G. Shen, Structural Properties of Sputter-deposited CNx/TiN Multilayer Films, Thin Solid Films 479 (1-2), 31-37 (2005).


  18. Z.-J. Liu, P.W. Shum, and Y.G. Shen, Linear Surface Smoothening of (Ti0.48Al0.52)N Thin Films Grown on Rough Substrates, Applied Physics Letters 86 (25), Article Number: 251908 (2005).


  19. Z. Chen, L. Shen, Y.-W. Mai, and Y.G. Shen, A Bifurcation-based Decohesion Model for Simulating the Transition from Localization to Decohesion with the MPM, Zeitschrift für Angewandte Mathematik und Physik (ZAMP) 56 (5), 908-930 (2005).


  20. Z.-J. Liu and Y.G. Shen, Temperature Effect on Surface Roughening of Thin Films, Surface Science, 595 (1-3), 20-29 (2005).


  21. C. Lu, Y.-W. Mai, and Y.G. Shen, Optimum Information in Crackling Noise, Physical Review E 72 (2), Article Number: 027101 (2005).


  22. Z.-J. Liu, C.H. Zhang, Y.G. Shen, and Y.-W. Mai, Monte Carlo Simulation of Nanocrystalline TiN/Amorphous SiNx Composite Films, Journal of Applied Physics 95 (2), 758-760 (2004).


  23. C.H. Zhang, Z.-J. Liu, K.Y. Li, and Y.G. Shen, Microstructure, Surface Morphology and Mechanical Properties of Nanocrystalline TiN/Amorphous Si3N4 Composite Films Synthesized by Ion Beam Assisted Deposition, Journal of Applied Physics 95 (3), 1460-1467 (2004).


  24. Y.G. Shen, Z.-J. Liu, N. Jiang, H.S. Zhang, K.H. Chan, and Z.K. Xu, Effect of Silicon Addition on Surface Morphology and Structural Properties of Titanium Nitride Films Grown by Reactive Unbalanced dc-Magnetron Sputtering, Journal of Materials Research 19 (2), 523-534 (2004).


  25. Z.-J. Liu and Y.G. Shen, Effects of Amorphous Matrix on the Grain Growth Kinetics in Two-phase Nanostructured Films: A Monte Carlo Study, Acta Materialia 52 (3), 729-736 (2004).


  26. Z.-J. Liu, Y.G. Shen, L.P. He, and T. Fu, Surface Evolution and Dynamic Scaling of Sputter-deposited Al Thin Films on Ti(100) Substrates, Applied Surface Science 226 (4), 371-377 (2004).


  27. Z.-J. Liu and Y.G. Shen, Role of Island Corner Rounding in the Morphology Transition of the Submonolayers Grown on Metal (110) Surfaces, Applied Surface Science 233 (1-4), 197-203 (2004).


  28. Z.-J. Liu and Y.G. Shen, Oscillating Growth of Surface Roughness in Multilayer Films, Applied Physics Letters 84 (25), 5121-5123 (2004).


  29. Z.-J. Liu, P.W. Shum, and Y.G. Shen, Hardening Mechanisms of Nanocrystalline Ti-Al-N Solid-Solution Films, Thin Solid Films 468 (1-2), 161-166 (2004).


  30. Z.-J. Liu and Y.G. Shen, Roughening Kinetics of Thin Film in the Presence of both Stress and Ehrlich-Schwobel Barrier, Applied Physics Letters 83 (26), 5404-5406 (2003).


  31. Y.G. Shen and Y.-W. Mai, Crystallized-Induced Stress in Reactively Sputter-deposited Molybdenum Nitride Thin Films, Philosophical Magazine Letters 83 (2), 125-133 (2003).


  32. Y.G. Shen, Effect of Deposition Conditions on Mechanical Stresses and Microstructure of Sputter-deposited Molybdenum and Reactively Sputter-deposited Molybdenum Nitride Films, Materials Science and Engineering A 359 (1-2), 158-167 (2003).


  33. Y.G. Shen and Y.-W. Mai, Reactively Sputter-deposited Mo-Ox-Ny Thin Films, Materials Science and Engineering B 95 (3), 222-229 (2002).


  34. Y.G. Shen and Y.-W. Mai, Structure and Properties of Stacking Faulted Tungsten Thin Films, Journal of Materials Science 36 (1), 93-98 (2001).


  35. Y.G. Shen, Y.-W. Mai, Q.C. Zhang, D.R. McKenzie, W.D. McFall and W.E. McBride, Residual Stress, Microstructure and Structure of Tungsten Thin Films Deposited by Magnetron Sputtering, Journal of Applied Physics 87 (1), 177-187 (2000).


  36. Y.G. Shen, Y.-W. Mai, D.R. McKenzie, Q.C. Zhang, W.D. McFall and W.E. McBride, Residual Stress and Structural Properties of Thin Tungsten Nitride Films Deposited by Reactive Magnetron Sputtering, Journal of Applied Physics 88 (3), 1380-1388 (2000).


  37. Y.G. Shen, Y.-W. Mai, W.E. McBride, Q.C. Zhang and D.R. McKenzie, Nitrogen-loss Characteristics in Tungsten Nitride Films, Thin Solid Films 372 (1-2), 257-264 (2000).


  38. Y.G. Shen and Y.-W. Mai, Reactively Sputtered WNxOy Thin Films, Journal of Materials Research 15 (11), 2437-2445 (2000).


  39. Y.G. Shen and Y.-W. Mai, Electron Diffraction and Electron Energy-Loss Spectroscopy Studies of Amorphous Tungsten and WO3 Thin Films, Applied Surface Science 167 (1-2), 59-68 (2000).


  40. Y.G. Shen and Y.-W. Mai, Influence of Oxygen on the Formation and Stability of A15 -W Thin Films, Materials Science and Engineering A 284 (1-2), 176-183 (2000).

Last modified on 21 April, 2008