凯发

Speaker-Zhiping Xu

Zhiping Xu
Tsinghua Unviersity, China
Zhiping Xu is an associate professor of Engineering Mechanics in Tsinghua University. He received his B.S. and Ph.D degrees in Engineering Mechanics at Tsinghua University in 2002 and 2007. After that, he joined in Tsinghua University as Research Assistant. During 2007-2008, he worked as postdoctoral research assistant at the Rice University in USA. During 2008-2010, he worked as postdoctoral associate at Massachusetts Institute of Technology, Cambridge, MA, USA. After that, he joined Tsinghua University. 

His work focuses on Network materials, their fundamental properties of building blocks, interfaces, topology, (self-) assembly and applications in energy and environmental research, Nanoscale fluid-structure interactions, with applications in biological and bio-inspired materials, nanomechanical devices for energy and sensory application.

He received The First-Class Awards for Natural Science from Ministry of Education of China in 2008, Samsung Global Research Outreach (GRO) Award in 2011, National Science Fund for Excellent Youth Scientists for National Natural Science Foundation of China in 2012.
Title：Defects in Graphene: Their Topology, Geometry and Roles in Material Design
SymposiumFundamental of Graphene, other 2D materials and Related Devices
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Abstract

Defects in solids commonly limit the material performance by acting as weak points under external loads or perturbations to propagating waves. However, here we will discuss the roles of defects in graphene, or in general two-dimensional (2D) crystals, from a constructive viewpoint. We will show the topological and geometrical aspects of defects in graphene, including the pre-strain and warping effects. These dual roles of defects modulate both local and global properties of the material in unexpected ways. For example, we will demonstrate that in some cases local response of 2D crystals can even be stiffened and strengthened by the presence of defects. These new findings not only shed lights on the characterization of 2D material properties, but also add a new dimension to material design, in the scenario of defect-based geometrical and topological engineering.

Reference:
[1] Nano Lett. 13, 1829 (2013); J. Appl. Mech. 80, 040911 (2013), 81, 091004 (2014); Arxiv: 1402.1006
[2] Appl. Phys. Lett. 99, 041901 (2011); J. Mater. Res. 29, 361 (2014)

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E-mail: meeting@c-gia.org

Abstract: Minyang Lu

Sponsor: Wenyang Yang

Media: Liping Wang

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