报告题目：Engineered Materials Genomes of Artificial 2D Lattices
报告人：李奕贤副教授, 台湾清华大学材料科学工程学系
时间：4月19日下午16:30-18:00
地点：卢嘉锡楼202报告厅
报告摘要：
Monolayers of van der Waals materials, including Graphene or transition metal dichalcogenides (TMDs), are considered ideal building blocks for constructing diverse artificial 2D lattices and hybrid hetero-systems. Heterostructures of nanomaterials, such as lateral multi-junctions of more than two different 2D monolayers, are intriguing for exploring new physics and materials properties.[1-5] Obtaining in-plane heterojunctions of monolayer TMDs with atomically sharp interfaces is very significant for fundamental research and applications. Here, a multistep chemical vapor deposition (CVD) synthesis of the in-plane multi-junctions of monolayer TMDs is presented. With optimized parameters, atomically sharp interfaces are successfully achieved in the synthesis of in-plane artificial lattices of the WS2/WSe2/MoS2 at reduced growth temperatures. Moreover, performances of the 2D monolayers were artificially engineered by geometrically tuning with 1D nanowires arrays or by physically integrating with optical microcavity.[6-8] Artificially engineering of the 2D materials offers an ideal platform to explore new physics and realize industrial applications for next-generation optoelectronics and photonics.
References
[1] Kuan-Chang Chiu, Adv. Mater. 30, 1704796 (2018)
[2] Xi-Ling et al, Adv. Mater., 28 (12), p.2322 (2016)
[3] Xin-Quan Zhang et al, Nano Lett, 15, p.410 (2015)
[4] Lili Yu et al, Nano Lett, 14, p.3055 (2014)
[5] Yi-Hsien Lee, et al., Nano Lett., 13, 1852 (2013)
[6] Xiaoze Liu et al, Nature Photonics, 9, p.30 (2015)
[7] Sam Yang et al, VLSI 2016
[8] Tung-Han Yang et al, Adv. Func. Mater., 28(7), 1706113 (2018)
报告人简介：
Dr. Yi-Hsien Lee
Associate Professor
Dept. Materials Science and Engineering (MSE),
National Tsing Hua University (NTHU)
E-mail: yhlee.mse@mx.nthu.edu.tw
Web: www.mse.nthu.edu.tw/~yhlee/
李奕贤副教授，2001年和2005年先后获得台湾清华大学材料科学工程学系硕士和博士学位。2006年-2013历任台湾中央研究院和麻省理工学院博士后。2013年起任台湾清华大学副教授。主要从事二维半导体材料及其异质结的生长，表面科学及超高真空STM/AFM的研究及多铁材料和铁/压电器件的研究，在国际上享有盛誉。曾获有庠科技论文奖（2015年）及清华大学新进研究员奖（2015）等荣誉。
