时间：2013年7月26日星期五 10:00

地点：能源基础楼（原膜中心楼）一楼会议室

报告人： Dr. Hailin Peng (彭海琳)

报告人单位：Peking University

报告摘要：

Two-dimensional (2D) layered crystals can be viewed as few-layer atomic planes isolated from a large variety of layered inorganic materials such as graphite, hexagonal boron nitride, transition metal oxides, transition metal dichalcogenides, III-VI group compounds, and V-VI group compounds. The unique properties of 2D crystals can have a large impact on fundamental research as well as applications in electronics, spintronics, photonics, and energy sciences. Here our recent studies on the controlled synthesis of 2D nanostructures such as graphene and its hybrid materials, topological insulator V2VI3 nanostructures, and other metal chalcogenides, as well as their optoelectronic properties will be discussed.

We proposed a van der Waals epitaxy method to achieve the controlled growth of various 2D layered materials, such as bilayer Bernal graphene, graphene based hybrid materials, and 2D nanostructures of topological insulator (Bi2Se3 and Bi2Te3) with well-aligned orientation, controlled thickness, and specific placement.

We have successfully incorporated a modulation doping technique for effective nitrogen doping of graphene, yielding high quality hybrid graphene film with p-n junctions capable of efficient photocurrent generation.

We present the first experimental demonstration of near-infrared transparent flexible electrodes based on few-layer topological-insulator Bi2Se3 nanostructures epitaxially grown on mica substrates. 2D nanostructures of topological insulator show promise as transparent flexible electrodes because of their superior near-infrared transparency and excellent conductivity, which is robust against surface contamination and bending. Our studies suggest that functional 2D layered materials hold great promise for future electronic and optoelectronic applications.

报告人简介：

彭海琳，1978年9月生。北京大学化学与分子工程学院副教授、博士生导师。入选教育部“新世纪优秀人才支持计划”、国家首批优秀青年基金获得者、中组部首批青年拔尖人才。

吉林大学学士(1996-2000)，北京大学博士(2000-2005)，美国斯坦福大学博士后(2005-2009)。2009年6月到北京大学工作至今。一直从事纳米材料化学与纳米器件研究，当前研究兴趣包括二维材料的控制合成方法、光电性质与新概念能源器件应用。迄今已发表SCI收录论文60余篇，包括Nature Materials (1篇), Nature Chemistry (1篇), Nature Communications(2篇)，Nature Nanotech. (2篇), Nano Lett. (15篇), J. Am. Chem. Soc. (5篇), Adv. Mater. (3篇), ACS Nano (4篇)、Small (5篇)，Acc. Chem. Res. (1篇)，Coord. Chem. Rev.(1篇)，论文被SCI他引2000余次。研究成果受到国内外同行的广泛关注，多次被Reviews of Modern Physics, Nature Materials, Nature Photonics, Nature Chemistry, C&E News, SLAC, PhysOrg.com等正面报道。获美国发明专利1项、申请美国发明专利1项和中国发明专利2项。曾获中国分析测试协会科学技术一等奖（2005年，排名第2）。

近3年来，在国际国内重要学术会议上做邀请报告30余次，筹划和组织国际和双边会议4次，包括2011年美国材料研究学会(MRS)秋季会议“拓扑绝缘体材料”分会(co-chair，这是该主题在MRS系列会议上首次召开)、2011年中国材料研讨会的“第一届中国-新加坡青年材料学家论坛”(co-chair)、2012年北京大学国际能源材料与化学研讨会(主要组织者)，2013年“纳米化学前沿论坛”国际会议（主要组织者）。