• 文献标题:   Experimental and theoretical demonstrations of ultraviolet absorption enhancement in porous nano-membrane graphene
  • 文献类型:   Article
  • 作  者:   KASRY A, FADLALLAH MM, VOELCKER NH, MAAROUF AA
  • 作者关键词:   first principles calculation, nanomembrane graphene, nanomesh, uv absorption
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   British Univ Egypt
  • 被引频次:   4
  • DOI:   10.1016/j.carbon.2019.08.038
  • 出版年:   2019

▎ 摘  要

Ultraviolet absorbing materials have important applications in which graphene is a strong candidate, yet, few efforts are being exerted to improve its absorption in the UV-region. We show that UV absorption in single-layer graphene can be enhanced by manoeuvring its electronic properties through converting it to a nanomembrane-like structure, or nanomesh. Regular and irregular pores were created by Electron Beam Lithography and a lithography-free process respectively. Theoretical calculations, using density functional theory, confirmed the experimental results, and indicated that the absorption peaks are a result of changes in the band structures of the nanomembrane graphene (NMGs) arising from the pore superlattice. (C) 2019 Elsevier Ltd. All rights reserved.