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Issue 15, 2013
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Organic ligand displacement by metal salts to enhance nanoparticle functionality: thermoelectric properties of Ag2Te

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Abstract

The presence of organic ligands on the surface of colloidal nanoparticles strongly limits their performance in technological applications where charge carrier transfer/transport plays an important role. We use metal salts, matched with the nanoparticle composition, to eliminate the surface organic ligands without introducing extrinsic impurities in the final nanomaterial. The potential of the simple, general and scalable processes presented here is demonstrated by characterizing the thermoelectric properties of nanostructured Ag2Te produced by the bottom up assembly of Ag2Te nanocrystals. A 6-fold increase of the thermoelectric figure of merit of Ag2Te was obtained when organic ligands were displaced by AgNO3. The same procedure can enhance the performance of nanocrystals and nanocrystal-based devices in a broad range of applications, from photovoltaics and thermoelectrics to catalysis.

Graphical abstract: Organic ligand displacement by metal salts to enhance nanoparticle functionality: thermoelectric properties of Ag2Te

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Article information


Submitted
11 Dec 2012
Accepted
13 Feb 2013
First published
13 Feb 2013

J. Mater. Chem. A, 2013,1, 4864-4870
Article type
Paper

Organic ligand displacement by metal salts to enhance nanoparticle functionality: thermoelectric properties of Ag2Te

D. Cadavid, M. Ibáñez, A. Shavel, O. J. Durá, M. A. López de la Torre and A. Cabot, J. Mater. Chem. A, 2013, 1, 4864
DOI: 10.1039/C3TA01455J

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