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

doi:10.1039/C9NR02087J

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

Universidad Autónoma de Madrid

Research output: Contribution to journal › Article › peer-review

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Abstract

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 language	English
Pages (from-to)	9194-9200
Number of pages	7
Journal	Nanoscale
Volume	11
Issue number	18
Early online date	9 Apr 2019
DOIs	https://doi.org/10.1039/C9NR02087J
Publication status	Published - 14 May 2019

ASJC Scopus subject areas

Materials Science(all)

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10.1039/C9NR02087J

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This is a post-peer-review, pre-copyedit version of an article published in Nanoscale. The final authenticated version is available online at: http://dx.doi.org/10.1039/C9NR02087J
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title = "Synthesis and characterization of Ag2S and Ag2S/Ag2(S,Se) NIR nanocrystals",

abstract = "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.",

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T1 - Synthesis and characterization of Ag2S and Ag2S/Ag2(S,Se) NIR nanocrystals

AU - Ruiz, Diego

AU - Mizrahi, Martin

AU - Santos, Harrison David

AU - Jaque, Daniel

AU - Jones, Callum

AU - Marques-Hueso, Jose

AU - Jacinto, Carlos

AU - Requejo, Felix G.

AU - Torres-Pardo, Almudena

AU - González-Calbet, José M.

AU - Juárez, Beatriz H.

PY - 2019/5/14

Y1 - 2019/5/14

N2 - 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.

AB - 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.

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DO - 10.1039/C9NR02087J

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JO - Nanoscale

JF - Nanoscale

IS - 18

ER -

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

Abstract

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