Selenium quantum dots: Preparation, structure, and properties

被引:18
|
作者
Qian, Fuli [1 ]
Li, Xueming [1 ]
Tang, Libin [2 ]
Lai, Sin Ki [3 ]
Lu, Chaoyu [1 ]
Lau, Shu Ping [3 ]
机构
[1] Yunnan Normal Univ, Solar Energy Res Inst, Kunming 650500, Peoples R China
[2] Kunming Inst Phys, Kunming 650223, Peoples R China
[3] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China
基金
中国国家自然科学基金;
关键词
GRAPHENE; NANOPARTICLES; PHOTOLUMINESCENCE; IRRADIATION; SILICENE; STANENE; GROWTH; CELLS; SIZE;
D O I
10.1063/1.4975358
中图分类号
O59 [应用物理学];
学科分类号
摘要
An interesting class of low-dimensional nanomaterials, namely, selenium quantum dots (SeQDs), which are composed of nano-sized selenium particles, is reported in this study. The SeQDs possess a hexagonal crystal structure. They can be synthesized in large quantity by ultrasound liquid-phase exfoliation using NbSe2 powders as the source material and N-Methyl-2-pyrrolidone (NMP) as the dispersant. During sonication, the Nb-Se bonds dissociate; the SeQDs are formed, while niobium is separated by centrifugation. The SeQDs have a narrow diameter distribution from 1.9 to 4.6 nm and can be dispersed with high stability in NMP without the need for passivating agents. They exhibit photoluminescence properties that are expected to find useful applications in bioimaging, optoelectronics, as well as nanocomposites.
引用
收藏
页数:4
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