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Synthesis and characterization of Ag 2 S and Ag 2 S/Ag 2 (S,Se) NIR nanocrystals.
- Source :
-
Nanoscale [Nanoscale] 2019 May 09; Vol. 11 (18), pp. 9194-9200. - Publication Year :
- 2019
-
Abstract
- Syntheses of metal sulfide nanocrystals (NCs) by heat-up routes in the presence of thiols yield NC arrangements difficult to further functionalize and transfer to aqueous media. By means of different NMR techniques, and exemplified by Ag2S NCs, a metal-organic polymer formed during the synthesis acting as a ligand has been identified to be responsible for such aggregation. In this work, a new synthetic hot-injection strategy is presented to synthesize Ag2S NCs which are easily ligand exchangeable in water. Furthermore, the hot-injection route allows an extra NC treatment with Se to produce Ag2S/Ag2(S,Se) NCs with improved optical properties with respect to the Ag2S cores, and better resistance to oxidation, as demonstrated by X-ray absorption experiments.
Details
- Language :
- English
- ISSN :
- 2040-3372
- Volume :
- 11
- Issue :
- 18
- Database :
- MEDLINE
- Journal :
- Nanoscale
- Publication Type :
- Academic Journal
- Accession number :
- 31038506
- Full Text :
- https://doi.org/10.1039/c9nr02087j