Experimental and theoretical demonstrations of ultraviolet absorption enhancement in porous nano-membrane graphene

Amal Kasry, Mohamed M. Fadlallah, Nicolas H. Voelcker, Ahmed A. Maarouf

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalCarbon
Volume155
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • First principles calculations
  • Nanomembrane graphene
  • Nanomesh
  • UV absorption

Cite this

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Experimental and theoretical demonstrations of ultraviolet absorption enhancement in porous nano-membrane graphene. / Kasry, Amal; Fadlallah, Mohamed M.; Voelcker, Nicolas H.; Maarouf, Ahmed A.

In: Carbon, Vol. 155, 01.12.2019, p. 65-70.

Research output: Contribution to journalArticleResearchpeer-review

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AB - 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.

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