Synthesis and characterization of Ag2S and Ag2S/Ag2(S,Se) NIR nanocrystals

Diego Ruiz, Martin Mizrahi, Harrison David Santos, Daniel Jaque, Callum Jones, Jose Marques-Hueso, Carlos Jacinto, Felix G. Requejo, Almudena Torres-Pardo, José M. González-Calbet, Beatriz H. Juárez

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Syntheses of metal sulfide nanocrystals (NCs) by heat-up routes in the presence of thiols yield NCs arrangements difficult to further functionalize and transfer to aqueous media. By means of different NMR techniques, and exemplified in Ag2S NCs, a metal-organic polymer formed during the synthesis acting as ligand has been identified as responsible for such aggregation. In this work a new synthetic hot-injection strategy is presented to synthesize Ag2S NCs easily ligand exchangeable into water. Furthermore, the hot-injection route allows an extra NCs 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.
Original languageEnglish
Pages (from-to)9194-9200
Number of pages7
Issue number18
Early online date9 Apr 2019
Publication statusPublished - 14 May 2019

ASJC Scopus subject areas

  • Materials Science(all)

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    Ruiz, D., Mizrahi, M., Santos, H. D., Jaque, D., Jones, C., Marques-Hueso, J., Jacinto, C., Requejo, F. G., Torres-Pardo, A., González-Calbet, J. M., & Juárez, B. H. (2019). Synthesis and characterization of Ag2S and Ag2S/Ag2(S,Se) NIR nanocrystals. Nanoscale, 11(18), 9194-9200.