• 文献标题:   Modifying the electrical properties of graphene by reversible point-ripple formation
  • 文献类型:   Article
  • 作  者:   ALYOBI MMM, BARNETT CJ, REES P, COBLEY RJ
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Swansea Univ
  • 被引频次:   9
  • DOI:   10.1016/j.carbon.2018.11.076
  • 出版年:   2019

▎ 摘  要

Strain, ripples and wrinkles in graphene reduce the charge-carrier mobility and alter the electronic behaviour. In few-layer graphene the anisotropy between the in-plane and cross-plane resistivity is altered and a band gap can be opened up. Here we demonstrate a method to reversibly induce point ripples in electrically isolated few-layer graphene with the ability to select the number of layers used for transport measurement down to single layer. During ripple formation the in-plane and cross-plane sheet resistances increase by up to 78% and 699% respectively, confirming that microscopic corrugation changes can solely account for graphene's non-ideal charge-carrier mobility. The method can also count the number of layers in few-layer graphene and is complimentary to Raman spectroscopy and atomic force microscopy when n