应拉斯维加斯0567官方网站秦勇教授邀请，北京大学拉斯维加斯0567官方网站俞大鹏教授将于2013年7月2日来我校访问讲学交流，敬请关注！

报告题目：Exploring the Peculiar Physical Properties and Applications of the Semiconductor Nanowires

报告时间：2013年7月2日（星期二）上午10:00

报告地点：格致楼5004报告厅

报告摘要：

Nanowires have been a top-five focused research topics in physics, and stimulated intensive interests world-wide. This lecture composes of two major parts. In the first part, I will give a brief summary of our pioneer and leading contributions to the world-wide nanowire research. In the main second part, I will extend to show the advantage of both high spatial and energy resolution cathodoluminescence (CL) in characterization of the fine structures of the nanomaterials. In particularly, I will demonstrate that the high special resolution of the CL at ~ 5.5 K enable us to address the significant strain modulation of the optical emission and electronic structures of semiconductor nano/micro wires. In contrast, the high energy resolution of the CL makes it possible to “see” directly the resonant SPP modes that are confined to the metal nanocavity.

报告人简介：

俞大鹏，男，1959年3月生。北京大学拉斯维加斯0567官方网站凝聚态物理与材料科学研究所教授。俞大鹏教授于1993年在法国南巴黎大学固体物理实验室（Orsay）获博士学位；2000年获得国家杰出青年科学基金；2002年获得教育部长江学者特聘教授，是教育部长江学者与创新计划“新型低维功能结构与物理”创新团队学术带头人。俞大鹏教授的主要研究方向为准一维半导体纳米结构与物理性质研究，是国际纳米线研究的创始人之一，在纳米线的制备、物理性质和器件效应研究方面做出的主要学术贡献包括:发展了催化液滴诱导与气相输运新方法、新技术规模制备硅纳米线，基本解决自下而上可控制备纳米线的核心难题；开拓了氧化物纳米线材料研究新领域；深入、系统地研究了纳米线的新奇物理性质和应用基础。俞大鹏教授共在国际核心专业刊物上发表360多篇论文，含国际顶级专业刊物论文Physical Review B/Letters（14）、Applied Physics Letters/JAP（75）、Advanced Materials（11）、Nano Letters（7）、Nature Communications等160余篇。相关论文被国内外其他同行累计引用超过10000次，H因子为56。以第一完成人获得了2004年度教育部提名自然科学一等奖、2007年获国家自然科学二等奖。担任Nano Research、《科学通讯》等国内外学术刊物编委，被邀请担任美国物理研究所（AIP）10 Year Review Committee Member（全球6名科学家）。俞大鹏教授迄今共培养研究生等70余名。

Selection of recent featured articles:

1. “Layer-by-layer assembly of vertically conducting graphene devices”, Jing-Jing Chen, JieMeng, Yang-Bo Zhou, Han-Chun Wu, Ya-Qing Bie, Zhi-Min Liao, Da-Peng Yu,Nature Communications4, 1921( 2013).

2. “Novel Planar-Structure Electrochemical Devices for Highly Flexible Semitransparent Power Generation Storage Sources”, HengLi,Qing Zhao, Wei Wang,Hui Dong, DongshengXu,GuijinZou,HuilingDuan,andDapeng Yu,Nano Letters13, 1271(2013).

3. “Strain induced exciton fine-structure splitting and shift in bent ZnOmicrowires”, Liao, Zhi-Min; Wu, Han-Chun; Fu, Qiang et al.,Scientific Reports2, 452(2012).

4. “Transparent, Double-Sided, ITO-Free, Flexible Dye-Sensitized Solar Cells Based on Metal Wire/ZnO Nanowire Arrays”, Wei Wang, Qing Zhao,Heng Li, Hongwei Wu, DechunZou, Dapeng Yu,Advanced Functional Materials22, 2775(2012).

5. “Large Magnetoresistance in Few Layer Graphene Stacks with Current Perpendicular to Plane Geometry”, Zhi-Min Liao, Han-Chun Wu, Shishir Kumar, Georg S. Duesberg, Yang-Bo Zhou, Graham L. W. Cross, Igor V. Shvets, and Da-Peng Yu,Advanced Materials24, 1862 (2012).

6. “Strain-gradient effect on energy bands in bent ZnOmicrowires”, Han XB，Liangzhi Kou, Zhuhua Zhang, Ziyue Zhang, Xinli Zhu, Jun Xu, Zhimin Liao, WanlinGuo，Dapeng Yu:Advanced Materials24, 4707(2012).

7. “Memory and Threshold Resistance Switching in Ni/NiO Core-shell Nanowire”,Li He, Zhi-Min Liao, Han-Chun Wu, Xiao-XueTian, Dong-Sheng Xu, Graham L. W. Cross, Georg S. Duesberg, I. V. Shvets, and Da-Peng Yu:Nano Letters11，4601(2011).

8. “Site-Specific Transfer-Printing of Individual GrapheneMicroscale Patterns to Arbitrary Surfaces”, Bie YQ; Zhou, YB; Liao, ZM; Yan, K; Liu, S; Zhao, Q; Kumar, S; Wu, HC; Duesberg, GS; Cross, GLW; Xu, J; Peng, HL; Liu, ZF; Yu, DP:Advanced Materials23, 3938(2011) .

9. “Vertical Plasmonic Resonant Nanocavities”, Zhu XL; Zhang, JS; Xu, J; Yu, DP：Nano Letters11，1117（2011）.

10. “Self-Powered, Ultrafast, Visible-Blind UV Detection and Optical Logical Operation based on ZnO/GaNNanoscale p-n Junctions”, Bie YQ; Liao, ZM; Zhang, HZ; Li, GR; Ye, Y; Zhou, YB; Xu, J; Qin, ZX; Dai, L; Yu, DP:Advanced Materials23,649(2011).

11. “Ultrafine and Smooth Full Metal Nanostructures for Plasmonics”, Zhu Xinli; Zhang Yang; Zhang Jiasen, Yu Dapeng:Advanced Materials22,4345(2010).

12. “Single ZnO Nanowire/p-type GaNHeterojunctions for Photovoltaic Devices and UV Light-Emitting Diodes”, Bie YQ; Liao, ZM; Wang, PW; Zhou, YB; Han, XB; Ye, Y; Zhao, Q; Wu, XS; Dai, L; Xu, J; Sang, LW; Deng, JJ; Laurent, K; Leprince-Wang, Y; Yu, DP:Advanced Materials22,4284(2010).

13. “Confined Three-Dimensional Plasmon Modes inside a Ring-Shaped Nanocavity on a Silver Film Imaged by Cathodoluminescence Microscopy”, Zhu XL; Ma, Y; Zhang, JS; Xu, J; Wu, XF; Zhang, Y; Han, XB; Fu, Q; Liao, ZM; Chen, L; Yu, DP:Physical Review Letters10, 127402(2010).

14. “Evidence for Thermal Spin-Transfer Torque”, Yu, HM; Granville, S; Yu, DP; Ansermet, JP:Physical Review Letters104,146601(2010).

15. “Electronic and Mechanical Coupling in Bent ZnO Nanowires”, Han XB; Kou, LZ; Lang, XL; Xia, JB; Wang, N; Qin, R; Lu, J; Xu, J; Liao, ZM; Zhang, XZ; Shan, XD; Song, XF; Gao, JY; Guo, WL; Yu, DP:Advanced Materials2,4937(2009).