Nanosecond laser treatment of graphene

被引：45

作者：

Kiisk, Valter ^{[1
]}

Kahro, Tauno ^{[1
]}

Kozlova, Jekaterina ^{[1
]}

Matisen, Leonard ^{[1
]}

Alles, Harry ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

来源：

APPLIED SURFACE SCIENCE | 2013年 / 276卷

关键词：

CVD graphene; Laser irradiation; Photoluminescence; Raman spectroscopy; RAMAN-SPECTROSCOPY;

D O I：

10.1016/j.apsusc.2013.03.047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Laser processing of graphene is of great interest for cutting, patterning and structural engineering purposes. Tunable nanosecond lasers have the advantage of being relatively widespread (compared to e. g. femtosecond or high-power continuous wave lasers). Hereby we have conducted an investigation of the impact of nanosecond laser pulses on CVD graphene. The damage produced by sufficiently strong single shots (pulse width 5 ns, wavelength 532 or 266 nm) from tunable optical parametric oscillator was investigated by the methods of scanning electron microscopy and optical microspectroscopy (Raman and fluorescence). Threshold of energy density for producing visible damage was found to be similar to 200 mJ/cm(2). For UV irradiation the threshold could be notably less depending on the origin of sample. Surprisingly strong fluorescence signal was recorded from damaged areas and is attributed to the residues of oxidized graphene. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：133 / 137

页数：5

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