• 文献标题:   Estimating Young's modulus of graphene with Raman scattering enhanced by micrometer tip
  • 文献类型:   Article
  • 作  者:   WENG SW, LIN WH, SU WB, HWU ET, CHEN PL, TSAI TR, CHANG CS
  • 作者关键词:   tipenhanced raman scattering, graphene, young s modulu
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484 EI 1361-6528
  • 通讯作者地址:   Acad Sinica
  • 被引频次:   12
  • DOI:   10.1088/0957-4484/25/25/255703
  • 出版年:   2014

▎ 摘  要

We demonstrate that the Raman intensities of G and 2D bands of a suspended graphene can be enhanced using a gold tip with an apex size of 2.3 mu m. The enhancement decays with the tip-graphene distance exponentially and remains detectable at a distance of 1.5 mu m. Raman mappings show that the enhanced area is comparable to the apex size. Application of a bias voltage to the tip can attract the graphene so that Raman signals are intensified. The exponential enhancement-distance relationship enables the measurement of the graphene deformation, and the Young's modulus of graphene is estimated to be 1.48 TPa.