Terahertz and optical study of monolayer graphene processed by plasma oxidation

Kyujin Choi, Juhwan Lim, J. R. Rani, Hyong Seo Yoon, Juyeong Oh, Taeyoon Hong, Taewoo Ha, Byung Cheol Park, Kyung Ik Sim, Seong Chan Jun, Jae Hoon Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We report on our terahertz and optical study of monolayer graphene grown by chemical vapor deposition and processed by plasma oxidation. The plasma oxidation induces oxygen-related defects, and the resulting disorder increases the sheet resistance of graphene as measured via terahertz spectroscopy. The excitonic absorption peak weakens considerably and blue shifts upon plasma oxidation, resulting in higher transmittance in both the visible and ultraviolet regions. Our oxygen plasma-treated graphene also exhibits a free-carrier doping effect as confirmed by the blue shift of the Raman G band.

Original languageEnglish
Article number131901
JournalApplied Physics Letters
Volume102
Issue number13
DOIs
Publication statusPublished - 2013 Apr 1

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graphene
blue shift
oxidation
oxygen plasma
transmittance
vapor deposition
disorders
shift
defects
oxygen
spectroscopy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Choi, Kyujin ; Lim, Juhwan ; Rani, J. R. ; Seo Yoon, Hyong ; Oh, Juyeong ; Hong, Taeyoon ; Ha, Taewoo ; Cheol Park, Byung ; Ik Sim, Kyung ; Chan Jun, Seong ; Hoon Kim, Jae. / Terahertz and optical study of monolayer graphene processed by plasma oxidation. In: Applied Physics Letters. 2013 ; Vol. 102, No. 13.
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Choi, K, Lim, J, Rani, JR, Seo Yoon, H, Oh, J, Hong, T, Ha, T, Cheol Park, B, Ik Sim, K, Chan Jun, S & Hoon Kim, J 2013, 'Terahertz and optical study of monolayer graphene processed by plasma oxidation', Applied Physics Letters, vol. 102, no. 13, 131901. https://doi.org/10.1063/1.4795526

Terahertz and optical study of monolayer graphene processed by plasma oxidation. / Choi, Kyujin; Lim, Juhwan; Rani, J. R.; Seo Yoon, Hyong; Oh, Juyeong; Hong, Taeyoon; Ha, Taewoo; Cheol Park, Byung; Ik Sim, Kyung; Chan Jun, Seong; Hoon Kim, Jae.

In: Applied Physics Letters, Vol. 102, No. 13, 131901, 01.04.2013.

Research output: Contribution to journalArticle

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