Article ID Journal Published Year Pages File Type
5397967 Journal of Luminescence 2017 17 Pages PDF
Abstract
Synthesis of Ag2S quantum dots (QDs) in water with increasing both Near Infrared (NIR) emission and nontoxicity of Ag2S quantum dots (QDs) have been a great challenge in nano-biotechnology. To reconcile these issues synthesis of Ag2S@ZnS in water with high quantum yield has been a great challenge. In this report, we have synthesized high quality and ultrafine Ag2S@ZnS core-shells in water with a fast and facile microwave irradiation technique. Thioglycolic acid (TGA) was employed as capping agent for the synthesis of Ag2S@ZnS in water for the first time. The prepared core-shells were optimized based on different experimental parameters and verified using UV-vis and PL spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. It was found that the core-shells show a strong absorption at 805 nm and emission located at 857 nm with a narrow width of 60 nm. The quantum yield of prepared core-shells was found to be 5.3% which is the highest value reported yet.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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