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Copper sulfide nanosheets with shape-tunable plasmonic properties in the NIR

Abstract

2D copper sulfide nanocrystals are promising building blocks for plasmonic materials in the near-infrared (NIR) spectral region. We demonstrate precise shape and size control (hexagonal/triangle) of colloidal plasmonic copper sulfide (covellite) nano-prisms simply by tuning the precursors concentration without introduction of additional ligands. The ultra-thin 2D nanocrystals possess sizes between 13 and 100 nm and triangular or hexangular shapes. We also demonstrate CuS nanosheets (NSs) with lateral sizes up to 2 microns using a syringe pump. Based on the experimental findings and DFT simulations we propose a qualitative and quantitative mechanism for the formation of different shapes. The analysis of the spectral features in the NIR of synthesized CuS nanocrystals has been performed in respect to the shape and the size of particles by the discrete dipole approximation method and the Drude-Sommerfeld theory.

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Publication details

The article was received on 20 Aug 2018, accepted on 11 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8NR06738D
Citation: Nanoscale, 2018, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Copper sulfide nanosheets with shape-tunable plasmonic properties in the NIR

    R. Lesyuk, E. Klein, I. Yaremchuk and C. Klinke, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR06738D

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