文献类型：期刊文献

英文题名：Lossless synthesis of graphene nanosheets decorated with tiny cadmium sulfide quantum dots with excellent nonlinear optical properties

作者：Feng, Miao[1];Sun, Ruiqing[2];Zhan, Hongbing[1];Chen, Yu[3]

机构：[1]Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China;[2]Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350108, Peoples R China;[3]E China Univ Sci & Technol, Adv Mat Lab, Dept Chem, Shanghai 200237, Peoples R China

年份：2010

卷号：21

期号：7

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20100412671406);WOS:【SCI-EXPANDED(收录号:WOS:000273824500012)】；

基金：This work was supported by the Natural Science Foundation of Fujian Province (2009J01241), the Fund of National Engineering Research Centre for Optoelectronic Crystalline Materials (2005DC105003), the National Natural Science Foundation of China (20676034, 20876046), the Ministry of Education of China (309013), Shanghai Municipal Educational Commission for the Shuguang Fellowship (08GG10) and the Shanghai Eastern Scholarship.

语种：英文

外文关键词：Nanocrystals - Nonlinear optics - Cadmium sulfide - Graphene - II-VI semiconductors - Optical properties - Semiconductor quantum dots - Nanosheets

摘要：The implantation and growth of metal nanoparticles on graphene nanosheets (GNS) leads directly to severe damage to the regular structure of the graphene sheets, which disrupts the extended p conjugation, resulting in an impaired device performance. In this paper, we describe a facile approach for achieving the lossless formation of graphene composite decorated with tiny cadmium sulfide quantum dots (QDs) with excellent nonlinear optical properties by using benzyl mercaptan (BM) as the interlinker. The mercapto substituent of BM binds to the CdS QDs during their nucleation and growth process, and then the phenyl comes into contact with the GNS via the pi-pi stacking interaction. Using this strategy, CdS QDs with an average diameter of 3 nm are uniformly dispersed over the surface of graphene, and the resulting QD-graphene composite exhibits excellent optical limiting properties, mainly contributed by nonlinear scattering and nonlinear absorption, upon both 532 and 1064 nm excitations, in the nanosecond laser pulse regime.