Can Raman Shift Be Used To Characterize the Mechanical Property of Graphene?
Can Raman Shift Be Used To Characterize the Mechanical Property of Graphene?
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DOI：
10.1021/acs.jpcc.8b07996
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
Kathleen L. Yang;J. Lee;H. Choo;Fuqian Yang
中科院分区：
文献类型：
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作者：
Kathleen L. Yang;J. Lee;H. Choo;Fuqian Yang
石墨烯在各种应用中具有潜力，包括应变工程电子和传感器。这些应用的核心是与石墨烯的应变诱导拉曼位移相关的电子性质的应变依赖性。本文将单轴拉伸时应变石墨烯的拉曼位移与机械应变之间的关系推广到三维应变状态，分析了均匀压力作用下正交各向异性、矩形和椭圆形单层石墨烯的弯曲诱导拉曼位移。结果表明，两种几何构型的石墨烯的中心都有最大的拉曼红移，而石墨烯的边缘附近存在拉曼蓝移。对于这两种几何构型，围绕中心的拉曼位移的轮廓以椭圆的形状存在，这取决于边界条件和石墨烯的几何构型。它的几何形状...
Graphene has potential in a variety of applications, including strain-engineering electronics and sensors. In the heart of these applications is the strain dependence of electronic properties associated to the strain-induced Raman shift of graphene. In this work, we extend the relationship between the Raman shift of strained graphene and the mechanical strains for uniaxial tension to three-dimensional strain state and analyze the bending-induced Raman shift of orthotropic, monolayer graphene of rectangular and elliptic shapes, respectively, under the action of uniform pressure. The results show that the largest Raman redshift is present at the center of the graphene for both geometric configurations, and there exists Raman blueshift near the edges of the graphene. For both geometrical configurations, the contours of the Raman shift around the center are present in the shape of ellipse, which is dependent on the boundary conditions and geometrical configurations of the graphene. The geometric shape of the ...