石墨烯量子点的组装及其表面增强拉曼效应
程虎虎,范月琼,赵扬,丁毅,曲良体*
1 北京理工大学化学院,北京市海淀区中关村南大街 5 号,100081
*Email: lqu@bit.edu.cn
石墨烯量子点是只有几个纳米尺寸的单层或者几层石墨烯,是一种特殊的新型的量子点。单独量子点
的构造组装会开启量子点应用的新的前景。本文成功的把零维的石墨烯量子点组装成为一维的石墨烯量子
点纳米管;这种纳米管展示出良好的增强拉曼效应,是一种全新的非金属增强拉曼基底材料。本文使用电
沉积的方法将零维石墨烯量子点沉积在多孔道氧化铝
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里,制备出的一维多孔石墨烯量子点纳米管,对
其进行了一系列的表征。增强拉曼性能的测试表明,由于石墨烯量子点组装纳米管独特的组成结构以及特
殊的材料性能,使其与目标分子在激光作用下有更有效的电荷转移,有着明显的增强拉曼效应。这种特殊
的由零维石墨烯量子点组装成的一维石墨烯量子点纳米管提供了一种新的构建增强拉曼基底材料的思路。
Fig. 1 (a) TEM image of functional GQDs. (b) SEM images of assembled nanotube arrays of GQDs after releasing from AAO
template. (c) TEM images of individual GQD nanotube.
Fig. 2 (a) 632. 8 nm excited Raman spectra of 4×10-6 M R6G drop-cast on Si wafer, adsorbed on Si wafer supported GQDs (GQDs/Si)
or GQD–NTs (GQD–NTs/Si). (b) 623.8 nm excited Raman spectra of R6G with different concentrations adsorbed on GQD–NTs/Si.
The concentrations of R6G from bottom to up are 8 × 10-11, 8 × 10-9, 8 × 10-7, 4 × 10-6, and 4 × 10-5 M.
关键词:石墨烯量子点;组装;增强拉曼效应
参考文献:
[1] Li,Y.; Zhao, Y.; Cheng, H.; Hu, Y.; Shi, G. Q.; Dai, L. M.; Qu, L. T. J. Am. Chem. Soc. 2012, 134: 15.
[2] Li, Y.; Hu, Y.; Zhao, Y.; Shi, G. Q.; Deng, L.; Hou, Y. B.; Qu, L. T. Adv. Mater. 2011, 23: 776.
[3] Fan, Y.; Cheng, H.; Zhou, C.; Xie, X.; Liu, Y.; Dai, L. M.; Zhang, J.; Qu, L. T. Nanoscale,
DOI:10.1039/C2NR12015A.
Graphene-Quantum-Dot Assembled Nanotubes for Efficient Raman
Enhancement
Huhu Cheng, Yueqiong Fan, Yang Zhao, Yi Ding, Liangti Qu*
1School of Chemistry, Beijing Institute of Technology, Beijing, 100081
2Department of Chemistry, Tsinghua University, Beijing 100084
In this study, we present the well-organized assembly of zero dimensional (0D) functional graphene quantum
dots (GQDs) into 1D nanotube (NT) arrays, and demonstrate their remarkable potential as a new metal-free
platform for efficient surface enhanced Raman scattering (SERS) applications.