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Effects of a modular two-step ozone-water and annealing process on silicon carbide graphene

Webb, Matthew J.; Polley, Craig LU ; Dirscherl, Kai; Burwell, Gregory; Palmgren, Pal; Niu, Yuran LU ; Lundstedt, Anna; Zakharov, Alexei LU ; Guy, Owen J. and Thiagarajan, Balasubramanian LU , et al. (2014) In Applied Physics Letters 105(8).
Abstract
By combining ozone and water, the effect of exposing epitaxial graphene on silicon carbide to an aggressive wet-chemical process has been evaluated after high temperature annealing in ultra high vacuum. The decomposition of ozone in water produces a number of oxidizing species, however, despite long exposure times to the aqueous-ozone environment, no graphene oxide was observed after the two-step process. The systems were comprehensively characterized before and after processing using Raman spectroscopy, core level photoemission spectroscopy, and angle resolved photoemission spectroscopy together with low energy electron diffraction, low energy electron microscopy, and atomic force microscopy. In spite of the chemical potential of the... (More)
By combining ozone and water, the effect of exposing epitaxial graphene on silicon carbide to an aggressive wet-chemical process has been evaluated after high temperature annealing in ultra high vacuum. The decomposition of ozone in water produces a number of oxidizing species, however, despite long exposure times to the aqueous-ozone environment, no graphene oxide was observed after the two-step process. The systems were comprehensively characterized before and after processing using Raman spectroscopy, core level photoemission spectroscopy, and angle resolved photoemission spectroscopy together with low energy electron diffraction, low energy electron microscopy, and atomic force microscopy. In spite of the chemical potential of the aqueous-ozone reaction environment, the graphene domains were largely unaffected raising the prospect of employing such simple chemical and annealing protocols to clean or prepare epitaxial graphene surfaces. (C) 2014 AIP Publishing LLC. (Less)
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Applied Physics Letters
volume
105
issue
8
publisher
American Institute of Physics
external identifiers
  • wos:000342753500017
  • scopus:84907326325
ISSN
0003-6951
DOI
10.1063/1.4893781
language
English
LU publication?
yes
id
e6ce5d2c-7d8f-4979-8de5-cee7778731af (old id 4800367)
date added to LUP
2014-12-01 14:36:22
date last changed
2017-08-27 03:13:51
@article{e6ce5d2c-7d8f-4979-8de5-cee7778731af,
  abstract     = {By combining ozone and water, the effect of exposing epitaxial graphene on silicon carbide to an aggressive wet-chemical process has been evaluated after high temperature annealing in ultra high vacuum. The decomposition of ozone in water produces a number of oxidizing species, however, despite long exposure times to the aqueous-ozone environment, no graphene oxide was observed after the two-step process. The systems were comprehensively characterized before and after processing using Raman spectroscopy, core level photoemission spectroscopy, and angle resolved photoemission spectroscopy together with low energy electron diffraction, low energy electron microscopy, and atomic force microscopy. In spite of the chemical potential of the aqueous-ozone reaction environment, the graphene domains were largely unaffected raising the prospect of employing such simple chemical and annealing protocols to clean or prepare epitaxial graphene surfaces. (C) 2014 AIP Publishing LLC.},
  articleno    = {081602},
  author       = {Webb, Matthew J. and Polley, Craig and Dirscherl, Kai and Burwell, Gregory and Palmgren, Pal and Niu, Yuran and Lundstedt, Anna and Zakharov, Alexei and Guy, Owen J. and Thiagarajan, Balasubramanian and Yakimova, Rositsa and Grennberg, Helena},
  issn         = {0003-6951},
  language     = {eng},
  number       = {8},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Effects of a modular two-step ozone-water and annealing process on silicon carbide graphene},
  url          = {http://dx.doi.org/10.1063/1.4893781},
  volume       = {105},
  year         = {2014},
}