报告简介：

Atomically thin 2D Transition metal dichalcogenide (TMD) materials provide a wide range of basic building blocks with unique electrical, optical, and thermal properties which do not exist in their bulk counterparts. Our recent demonstration in vapor phase growth of TMD monolayer has stimulated the research in growth and applications. In this presentation, I would start with the discussion on the synthesis and characterizations of crystalline MoS2 and WSe2 monolayers. These layer materials can be transferred to desired substrates, making them suitable building blocks for constructing multilayer stacks for various applications.
Heterostructures of 2d materials formed by vertical stacking have been realized recently via transfer of their exfoliated flakes, where their properties are dominated by the stacking orientation and strength of interlayer coupling. The method to determine valence band and conduction band alignment for various TMD materials is proposed. Another very attractive structure is the lateral heterostructure, where the junction is atomically sharp and the active region can be as narrow as few strings of atoms at the junction areas. This structure offers much easier band offset tuning since materials are spatially separated. The direct growth of such lateral heterostructures will be presented. These unique 2D heterostructures have abundant implications for many potential applications.

报告人：

Li received a BSc and an MSc in chemistry at National Taiwan University. After 5 years of R&D at Taiwan Semiconductor Manufacturing Company (1997-2002), he obtained his PhD from Oxford University in 2006. He was an assistant professor in Nanyang Tech. Univ. Singapore (2006-2009). Since 2010, he has become an Associate Prof. at Academia Sinica Taiwan and he started his Associate Professorship at KAUST in 2014. He has obtained Humboldt Research Fellowship for Experienced Researchers (Germany 2011) and Career Development Award Taiwan (2010). He has received Academia Sinica Research Awards and Wu Ta-Yu Research Awards in 2013.  He is now having > 11430 citations, more than 210 SCI journals and h-index is 54 (ISI Web of knowledge). He is also a CTO of one start up company in Taiwan.
 
Website: http://2dmaterials.kaust.edu.sa/Pages/Home.aspx   http://www.researcherid.com/rid/D-5244-2011
 
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