时 间：   2013年10月30日上午10:30
地 点：   四川大学物理学院物理馆三楼学术会议厅323室
报告题目：

Controllable Synthesis of Graphene Nanostructures for Device Applications
报告人： 魏大程,博士,新加坡国立大学

报告摘要：

Graphene is regarded as one of the promising candidates for future nanoelectronics due to its atomic thickness, excellent properties and widespread applications.[1,2] For practical applications, various types of graphene are required, which will serve as different components in future electronics. As the first step for practical applications, graphene should be produced in a controllable manner. Therefore, controllable synthesis of graphene is of great significance. Here, we will introduce several methods for production of graphene, which realize control over the shapes,[3] locations,[4] doping,[5] edge structures,[6] nanojunctions,[7] etc. Moreover, normal growth methods require a high temperature and require graphene to be transferred to the dielectric substrate in application. To solve these problems, we develop a low temperature growth method, which realizes growth of single crystalline graphene directly on silicon substrate without any metal catalysts.[8] For applications, we fabricated various devices using these controllablely-produced samples, including field-effect transistors, rectifiers, photodetectors, switches, logic gates, etc. We believe these controllable growth methods would be of great worth in future graphene-based electronics.

        [1] Dacheng Wei, et al. Accounts of Chemical Research 46: 106-115 (2013).

       [2] Dacheng Wei, et al. Advanced Materials 22: 3225-3241 (2010).

       [3] Dacheng Wei, et al. Journal of the American Chemical Society 131: 11147 (2009).

       [4] Chongan Di, Dacheng Wei, et al. Advanced Materials 20: 3289-3293 (2008).

       [5] Dacheng Wei, et al. Nano Letters 9: 1752-1758 (2009).

       [6] Han Huang†, Dacheng Wei†, et al. (†contributed equally) Scientific Reports 2: 983 (2012).

       [7] Dacheng Wei*, et al. Nature Communications 4: 1374 (2013).

       [8] Dacheng Wei*, et al. Angewandte Chemie International Edition (accepted)

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             物理科学与技术学院

                                   2013-10-26