EE Special Seminar

Topic: 
Mechanical-electric-magnetic coupling and energy conversion in two-dimensional materials
Monday, April 4, 2016 - 3:15pm to 4:30pm
Venue: 
Packard 101
Speaker: 
Wanlin Guo (Nanjing University of Aeronautics and Astronautics)
Abstract / Description: 

When the spatial scale goes down from macroscale to nanoscale, temporal scale will reduce to nano to femtosecond, and more importantly, the related energy scale of an externally applied field will drop for eighteen orders from joule to attojoule (1 nN times 1 nm = 6.42 eV), falling into the energy scale of the local fields of matter which consist of electronic structures, charge, molecular orbital and spin states. Therefore, at nanoscale, matters will show distinctly different performances from their bulk materials mainly due to the strong coupling between the local fields of matter and external applied fields, turning common materials such as carbon, even insulators, into functional nanomaterials with the exceptional properties that are required for nanoelectronics, spintronics as well as energy conversion devices. In this talk, I will demonstrate by our recent findings

(i) such exceptional functional properties in graphene, h-BN, transition metal dichalcogenides, black phosphorous and boron nanofilms;

(ii) fabrication of two-dimensional materials and their one- and three- dimensional derivates by merging top-down and bottom-up methodology;

(iii) their applications for sensors and generators.

Bio:

Dr. Wanlin Guo (PhD, Solid Mechanics, Northwestern Ploytechnology University, March 1991, under supervising of Prof. Yushan Huang who obtained his PhD in Stanford in 1940 supervised by Prof. Stephen P. Timoshenko) worked as associated and full professor in Xian Jiaotong University before 2000. In 1995-1998, he worked at the Center-of-Expertise of Australian DSTO center in Monash University and obtained the Outstanding Young Scientist Award (Premier Fund) of China in 1996. He joined NUAA as the chair professor of Cheung Kong Scholars plan in 2000, and his Nanoscale Physical Mechanics team enters the Cheung Kong Scholars Excellent Team Programme of the Ministry of Education in 2005. In 2010, he founded the Key Laboratory of Intelligent Nano Materials and Devices of MoE. His current research interests cover intelligent nano materials and devices, energy conversion nanotechnology, three dimensional fatigue fracture and damage tolerance and durability of mechanical structures. He has published 300+ refereed papers in mechanics-related journals such as Nature Nanotech, Nature Comm. Phys. Rev. Lett., Nano Lett., J. Am. Chem. Soc., Adv. Mater., J. Mech. Phys. Solids et al. and awarded the 2nd National Prize in Natural Science in 2012 for his contribution to nanoscale physical mechanics.