Etching single-wall carbon nanotubes into green and yellow single-layer graphene quantum dots

被引：100

作者：

Dong, Yongqiang ^{[1
,2
]}

Pang, Hongchang ^{[2
]}

Ren, Shuyan ^{[1
]}

Chen, Congqiang ^{[1
]}

Chi, Yuwu ^{[1
]}

Yu, Ting ^{[2
,3
]}

机构：

[1] Fuzhou Univ, MOE Key Lab Anal & Detect Technol Food Safety, Fujian Prov Key Lab Anal & Detect Technol Food Sa, Dept Chem, Fuzhou 350108, Fujian, Peoples R China

[2] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[3] Natl Univ Singapore, Fac Sci, Dept Phys, Singapore 117542, Singapore

来源：

CARBON | 2013年 / 64卷

基金：

中国国家自然科学基金;

关键词：

UP-CONVERSION; AVENUE; OXIDE;

D O I：

10.1016/j.carbon.2013.07.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Single-walled carbon nanotubes (SWCNTs) have been used to prepare single-layered graphene quantum dots (GQDs) through a simple and green hydrothermal etching method. After the characterization of products and intermediates with scanning electronic microscopy, Raman and FTIR, a possible mechanism has been proposed for the formation of GQDs. The treatment of SWCNTs has resulted in two kinds of GQDs (i.e. GQD1 and GQD2), both of which are monodisperse and single-layered nanosheets with an average lateral dimension of 8 nm and an average height of 0.5 nm. Excited with 365 nm UV light, aqueous solutions of GQDs1 and GQDs2 give green and yellow luminescence, respectively. The differences in optical property between GQDs1 and GQDs2 mainly results from their differences in degree of oxidation. (C) 2013 Elsevier Ltd. All rights reserved.

引用

收藏

页码：245 / 251

页数：7

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