Journal
NANOTECHNOLOGY
Volume 20, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/12/125301
Keywords
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Funding
- Natural Science Fund of China [20573017]
- Analysis and Testing Foundation of Northeast Normal University
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A novel water/glycerol/polyvinylpyrrolidone (PVP) ternary system is developed to realize the successful growth of PbS nanocubes with a narrow size distribution and sharp facets and edges using a one-step synthesis at room temperature for the first time. The synthesis is very fast, high yield, environment-friendly, and low cost. The product possesses uniform dimensionality, high crystallinity and better dispersibility. After dispersing the nanocubes in water or ethanol, the as-formed colloidal suspensions can maintain excellent stability for more than one year under ambient conditions. Uniform silica layers were successfully coated onto the nanocubes via a modified Stober method to enhance their performance for promising applications. Moreover, by soaking the as-prepared PbS/SiO(2) core-shell nanocubes in hydrochloric acid aqueous solution, well-resolved cubic SiO(2) nanoboxes were obtained. The formation mechanism and the reason for the better dispersibility and excellent stability of the as-obtained nanocubes are also discussed rationally.
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