报告题目：Games that scientists play with carbon and phosphorus nanostructures

报 告 人：David Tomanek（Michigan State University）

报告时间： 2015年6月19日(星期五)下午2：00-3:30

报告地点：嘉定园区办公楼316房间

报告人研究方向：

•Nanowires

•Carbon nanotubes

•Simulation of fullerene collisions

•Simulation of C60 melting

•Simulation of ferrofluids

报告摘要：

Graphene monolayers, have sparked off unprecedented interest due to their unique electronic structure, but will unlikely replace silicon electronics due to a vanishing fundamental band gap. To still realize the promise of 2D semiconductor electronics, scientists are turning to other layered materials with a nonzero band gap. In this respect, layered structures of group V elements are rapidly attracting interest. Few-layer phosphorus dubbed phosphorene combines high carrier mobility with an unprecedented tunability of the band gap [1-3]. Multiple allotropes of phosphorene, illustrated in Figure 1, may be synthesized by CVD and coexist within a monolayer with virtually no energy penalty to form grain boundaries [3]. Similar to graphene, phosphorene may form fullerenes and nanotubes [4]. There are countless possibilities to tile a phosphorene monolayer with different allotropes, providing the possibility of complex electronic structure patterning [5]. Similar intriguing electronic properties as found in phosphorene are postulated also for arsenene, a monolayer of gray arsenic. Computer simulations are a welcome means to gain microscopic insight into the physical properties and possible ways to synthesize these structures, as a guide to experimental efforts.