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Structure and vacancy distribution in copper telluride nanoparticles influence plasmonic activity in the near-infrared.

Nature communications (2017-03-31)
Tom Willhammar, Kadir Sentosun, Stefanos Mourdikoudis, Bart Goris, Mert Kurttepeli, Marnik Bercx, Dirk Lamoen, Bart Partoens, Isabel Pastoriza-Santos, Jorge Pérez-Juste, Luis M Liz-Marzán, Sara Bals, Gustaaf Van Tendeloo
ABSTRACT

Copper chalcogenides find applications in different domains including photonics, photothermal therapy and photovoltaics. CuTe nanocrystals have been proposed as an alternative to noble metal particles for plasmonics. Although it is known that deviations from stoichiometry are a prerequisite for plasmonic activity in the near-infrared, an accurate description of the material and its (optical) properties is hindered by an insufficient understanding of the atomic structure and the influence of defects, especially for materials in their nanocrystalline form. We demonstrate that the structure of Cu

MATERIALS
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Brand
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Sigma-Aldrich
Oleic acid, ≥99% (GC)
Sigma-Aldrich
Lithium bis(trimethylsilyl)amide, 97%