Search

Your search keyword '"chemically vapor deposited (CVD) graphene"' showing total 2 results
Start Over Descriptor "chemically vapor deposited (CVD) graphene"
2 results on '"chemically vapor deposited (CVD) graphene"'

1. Kinetics of defect formation in chemically vapor deposited (CVD) graphene during laser irradiation: The case of Raman investigation.

Author

Amato, Giampiero, Milano, Gianluca, Vignolo, Umberto, and Vittone, Ettore

Abstract

The effect of laser irradiation on chemically vapor deposited (CVD) graphene was studied by analyzing the temporal evolution of Raman spectra acquired under various illumination conditions. The spectra showed that the normalized intensity of the defect-related peak increases with the square root of the exposure time and varies almost linearly with the laser power density. Furthermore, the hardness of graphene to radiation damage depends on its intrinsic structural quality. The results suggest that, contrary to the common belief, micro-Raman spectroscopy cannot be considered a noninvasive tool for the characterization of graphene. The experimental observations are compatible with a model that we derived from the interpretative approach of the Staebler-Wronski effect in hydrogenated amorphous silicon; this approach assumes that the recombination of photoexcited carriers induces the breaking of weak C-C bonds. [Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
View/download PDF

2. Kinetics of defect formation in chemically vapor deposited (CVD) graphene during laser irradiation: The case of Raman investigation

Author

Ettore Vittone, Gianluca Milano, Umberto Vignolo, and Giampiero Amato

Subjects
Amorphous silicon, Materials science, Kinetics, Analytical chemistry, laser irradiation, Molecular physics, law.invention, chemistry.chemical_compound, symbols.namesake, law, Radiation damage, General Materials Science, Irradiation, Electrical and Electronic Engineering, Spectroscopy, defect kinetics, chemically vapor deposited (CVD) graphene, Graphene, Condensed Matter Physics, Laser, Atomic and Molecular Physics, and Optics, chemistry, Raman spectroscopy, symbols, chemically vapor deposited (CVD) graphene, Raman spectroscopy, defect kinetics, laser irradiation
Abstract

The effect of laser irradiation on chemically vapor deposited (CVD) graphene was studied by analyzing the temporal evolution of Raman spectra acquired under various illumination conditions. The spectra showed that the normalized intensity of the defect-related peak increases with the square root of the exposure time and varies almost linearly with the laser power density. Furthermore, the hardness of graphene to radiation damage depends on its intrinsic structural quality. The results suggest that, contrary to the common belief, micro-Raman spectroscopy cannot be considered a noninvasive tool for the characterization of graphene. The experimental observations are compatible with a model that we derived from the interpretative approach of the Staebler–Wronski effect in hydrogenated amorphous silicon; this approach assumes that the recombination of photoexcited carriers induces the breaking of weak C–C bonds.

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results