Difference in formation of carbon cluster cations by laser ablation of graphene and graphene oxide

被引:34
作者
Kong, Xianglei [1 ,4 ]
Huang, Yi [2 ,3 ]
Chen, Yongsheng [2 ,3 ]
机构
[1] Nankai Univ, State Key Lab, Tianjin 300071, Peoples R China
[2] Nankai Univ, Inst Polymer Chem, Coll Chem, Ctr Nanoscale Sci & Technol, Tianjin 300071, Peoples R China
[3] Nankai Univ, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China
[4] Nankai Univ, Inst Elementoorgan Chem, Tianjin 300071, Peoples R China
来源
JOURNAL OF MASS SPECTROMETRY | 2012年 / 47卷 / 04期
基金
中国国家自然科学基金;
关键词
carbon cluster cation; graphene; laser ablation; CAD; graphene oxide; MASS-SPECTROMETRY; C-60; GRAPHITE; MODEL;
D O I
10.1002/jms.2985
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The distributions of positive carbon cluster ions produced by laser ablation of graphene (G) and graphene oxide (GO) are found to be quite different. Under a typical experimental condition, narrow distributions of even-numbered clusters from C60+ to C162+ were observed for G, and broad distributions including even-numbered clusters from C100+ to C400+ and odd-numbered clusters from C189+ to C395+ were observed for GO. The threshold of laser energy for G is lower than that of GO. Further results of collision-activated dissociation mass spectrometry indicate that the cluster ions generated from G are structurally similar but are different with those generated from GO or nanodiamonds. It is proposed that the experimentally observed difference can be attributed to the different mechanisms behind the process. A top-down mechanism including both direct transformation of G to fullerene and fragmentation of large-sized fullerenes is suggested for the generation of carbon cluster cations in the process of laser ablation of G. For GO, the experimental results are close to those of nanodiamonds and other materials reported previously and can be explained by the generally accepted bottom-up mechanism. Copyright (c) 2012 John Wiley & Sons, Ltd.
引用
收藏
页码:523 / 528
页数:6
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