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http://hdl.handle.net/10397/66065
Title: | Selenium quantum dots : Preparation, structure, and properties | Authors: | Qian, F Li, X Tang, L Lai, SK Lu, C Lau, SP |
Issue Date: | 2017 | Source: | Applied physics letters, 2017, v. 110, no. 5, 53104, p. 053104-1-053104-4 | Abstract: | 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. | Publisher: | American Institute of Physics | Journal: | Applied physics letters | ISSN: | 0003-6951 | EISSN: | 1077-3118 | DOI: | 10.1063/1.4975358 | Rights: | © 2017 Author(s). This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in F. Qian et al., Appl. Phys. Lett. 110, 53104 (2017) and may be found at https://dx.doi.org/10.1063/1.4975358 |
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