Effects of low power CO2 laser irradiation on structure of multilayer graphene

Jiangyou Long; Ting Huang; Xiaohui Ye; Zhe Lin; Minlin Zhong; Juan Jiang; Lin Li

doi:10.3788/CJL201239.1206001

Effects of low power CO₂ laser irradiation on structure of multilayer graphene

Jiangyou Long, Ting Huang, Xiaohui Ye, Zhe Lin, Minlin Zhong, Juan Jiang, Lin Li

Research output: Contribution to journal › Article › peer-review

Abstract

Multilayer graphene generated by chemical vapor deposition (CVD) method is irradiated by CO₂ laser in vacuum with different power densities and irradiation time. Raman spectroscopy is used to clarify the influences of laser power density and irradiation time on the structure modification. At a laser power density of 13 W/cm², the decrease of D-band and the increase of G-band intensity are due to the reduction of defects. In contrast, the sample irradiated with higher power density shows that the D-band intensity increase dramatically caused by the laser thermal effects. Nanocrystalline graphene is formed as the defects after irradiation at higher power desities. With increasing irradiation time to 120 s, amorphous carbon is formed at the surface of graphene at a lase power density of 58 W/cm². These results show that proper irradiation of CO₂ laser can improve the charactervstics of graphene.

Original language	English
Article number	1206001
Journal	Zhongguo Jiguang/Chinese Journal of Lasers
Volume	39
Issue number	12
DOIs	https://doi.org/10.3788/CJL201239.1206001
Publication status	Published - 2012 Dec
Externally published	Yes

Keywords

CO laser irradiation
Graphene
Laser techology
Raman spectroscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

Access to Document

10.3788/CJL201239.1206001

Cite this

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title = "Effects of low power CO2 laser irradiation on structure of multilayer graphene",

abstract = "Multilayer graphene generated by chemical vapor deposition (CVD) method is irradiated by CO2 laser in vacuum with different power densities and irradiation time. Raman spectroscopy is used to clarify the influences of laser power density and irradiation time on the structure modification. At a laser power density of 13 W/cm2, the decrease of D-band and the increase of G-band intensity are due to the reduction of defects. In contrast, the sample irradiated with higher power density shows that the D-band intensity increase dramatically caused by the laser thermal effects. Nanocrystalline graphene is formed as the defects after irradiation at higher power desities. With increasing irradiation time to 120 s, amorphous carbon is formed at the surface of graphene at a lase power density of 58 W/cm2. These results show that proper irradiation of CO2 laser can improve the charactervstics of graphene.",

keywords = "CO laser irradiation, Graphene, Laser techology, Raman spectroscopy",

author = "Jiangyou Long and Ting Huang and Xiaohui Ye and Zhe Lin and Minlin Zhong and Juan Jiang and Lin Li",

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T1 - Effects of low power CO2 laser irradiation on structure of multilayer graphene

AU - Long, Jiangyou

AU - Huang, Ting

AU - Ye, Xiaohui

AU - Lin, Zhe

AU - Zhong, Minlin

AU - Jiang, Juan

AU - Li, Lin

PY - 2012/12

Y1 - 2012/12

N2 - Multilayer graphene generated by chemical vapor deposition (CVD) method is irradiated by CO2 laser in vacuum with different power densities and irradiation time. Raman spectroscopy is used to clarify the influences of laser power density and irradiation time on the structure modification. At a laser power density of 13 W/cm2, the decrease of D-band and the increase of G-band intensity are due to the reduction of defects. In contrast, the sample irradiated with higher power density shows that the D-band intensity increase dramatically caused by the laser thermal effects. Nanocrystalline graphene is formed as the defects after irradiation at higher power desities. With increasing irradiation time to 120 s, amorphous carbon is formed at the surface of graphene at a lase power density of 58 W/cm2. These results show that proper irradiation of CO2 laser can improve the charactervstics of graphene.

AB - Multilayer graphene generated by chemical vapor deposition (CVD) method is irradiated by CO2 laser in vacuum with different power densities and irradiation time. Raman spectroscopy is used to clarify the influences of laser power density and irradiation time on the structure modification. At a laser power density of 13 W/cm2, the decrease of D-band and the increase of G-band intensity are due to the reduction of defects. In contrast, the sample irradiated with higher power density shows that the D-band intensity increase dramatically caused by the laser thermal effects. Nanocrystalline graphene is formed as the defects after irradiation at higher power desities. With increasing irradiation time to 120 s, amorphous carbon is formed at the surface of graphene at a lase power density of 58 W/cm2. These results show that proper irradiation of CO2 laser can improve the charactervstics of graphene.

KW - CO laser irradiation

KW - Graphene

KW - Laser techology

KW - Raman spectroscopy

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