Raman Spectral Band Oscillations in Large Graphene Bubbles

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Title
Raman Spectral Band Oscillations in Large Graphene Bubbles
Author(s)
Yuan Huang; Xiao Wang; Xu Zhang; Xianjue Chen; Baowen Li; Bin Wang; Ming Huang; Chongyang Zhu; Xuewei Zhang; Wolfgang S. Bacsa; Feng Ding; Rodney S. Ruoff
Publication Date
2018-05
Journal
PHYSICAL REVIEW LETTERS, v.120, no.18, pp.186104 -
Publisher
AMER PHYSICAL SOC
Abstract
Raman spectra of large graphene bubbles showed size-dependent oscillations in spectral intensity and frequency, which originate from optical standing waves formed in the vicinity of the graphene surface. At a high laser power, local heating can lead to oscillations in the Raman frequency and also create a temperature gradient in the bubble. Based on Raman data, the temperature distribution within the graphene bubble was calculated, and it is shown that the heating effect of the laser is reduced when moving from the center of a bubble to its edge. By studying graphene bubbles, both the thermal conductivity and chemical reactivity of graphene were assessed. When exposed to hydrogen plasma, areas with bubbles are found to be more reactive than flat graphene. © 2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4729
ISSN
0031-9007
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
Files in This Item:
4. PhysRevLett.120.186104.pdfDownload

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