Abstract
Abstract Although various applications extensively utilize polymer-assisted graphene transfer step, the role of residual polymer on graphene was not well-understood. Here, we report the effect of poly (methyl methacrylate) (PMMA) on chemical vapor deposition-grown hexagonal graphene via Raman spectroscopy. Analysis of bare-, PMMA-covered supported, and PMMA-covered suspended graphene exhibits that their G and 2D band positions are progressively downshifted in that order. Mapping of spatial G and 2D band shifts into doping and strain contributions shows that PMMA residue exerts moderate 0.15% tensile strain on graphene/substrate, as compared to that of bare graphene. During this tensile strain, residual PMMA-covered graphene maintains its doping level as much as bare graphene does.
| Original language | English |
|---|---|
| Article number | 9679 |
| Pages (from-to) | 318-324 |
| Number of pages | 7 |
| Journal | Carbon |
| Volume | 86 |
| DOIs | |
| Publication status | Published - 2015 May 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
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Role of residual polymer on chemical vapor grown graphene by Raman spectroscopy. / Koo, Eunhye; Ju, Sang Yong.
In: Carbon, Vol. 86, 9679, 01.05.2015, p. 318-324.Research output: Contribution to journal › Article
TY - JOUR
T1 - Role of residual polymer on chemical vapor grown graphene by Raman spectroscopy
AU - Koo, Eunhye
AU - Ju, Sang Yong
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Abstract Although various applications extensively utilize polymer-assisted graphene transfer step, the role of residual polymer on graphene was not well-understood. Here, we report the effect of poly (methyl methacrylate) (PMMA) on chemical vapor deposition-grown hexagonal graphene via Raman spectroscopy. Analysis of bare-, PMMA-covered supported, and PMMA-covered suspended graphene exhibits that their G and 2D band positions are progressively downshifted in that order. Mapping of spatial G and 2D band shifts into doping and strain contributions shows that PMMA residue exerts moderate 0.15% tensile strain on graphene/substrate, as compared to that of bare graphene. During this tensile strain, residual PMMA-covered graphene maintains its doping level as much as bare graphene does.
AB - Abstract Although various applications extensively utilize polymer-assisted graphene transfer step, the role of residual polymer on graphene was not well-understood. Here, we report the effect of poly (methyl methacrylate) (PMMA) on chemical vapor deposition-grown hexagonal graphene via Raman spectroscopy. Analysis of bare-, PMMA-covered supported, and PMMA-covered suspended graphene exhibits that their G and 2D band positions are progressively downshifted in that order. Mapping of spatial G and 2D band shifts into doping and strain contributions shows that PMMA residue exerts moderate 0.15% tensile strain on graphene/substrate, as compared to that of bare graphene. During this tensile strain, residual PMMA-covered graphene maintains its doping level as much as bare graphene does.
UR - http://www.scopus.com/inward/record.url?scp=84924605454&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924605454&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2015.01.055
DO - 10.1016/j.carbon.2015.01.055
M3 - Article
AN - SCOPUS:84924605454
VL - 86
SP - 318
EP - 324
JO - Carbon
JF - Carbon
SN - 0008-6223
M1 - 9679
ER -