Skip to content
Journal article

Metallic-like stoichiometric copper sulfide nanocrystals: Phase- and shape-selective synthesis, near-infrared surface plasmon resonance properties, and their modeling

Xie Y, Carbone L, Nobile C, Grillo V, D'Agostino S, Della Sala F, Giannini C, Altamura D, Oelsner C, Kryschi C, Cozzoli P ...see all

ACS Nano, vol. 7, issue 8 (2013) pp. 7352-7369

  • 68

    Readers

    Mendeley users who have this article in their library.
  • 112

    Citations

    Citations of this article.
  • N/A

    Views

    ScienceDirect users who have downloaded this article.
Sign in to save reference

Abstract

In the realm of semiconductor nanomaterials, a crystal lattice heavily doped with cation/anion vacancies or ionized atomic impurities is considered to be a general prerequisite to accommodating excess free carriers that can support localized surface plasmon resonance (LSPR). Here, we demonstrate a surfactant-assisted nonaqueous route to anisotropic copper sulfide nanocrystals, selectively trapped in the covellite phase, which can exhibit intense, size-tunable LSPR at near-infrared wavelengths despite their stoichiometric, undoped structure. Experimental extinction spectra are satisfactorily reproduced by theoretical calculations performed by the discrete dipole approximation method within the framework of the Drude–Sommerfeld model. The LSPR response of the nanocrystals and its geometry dependence are interpreted as arising from the inherent metallic-like character of covellite, allowed by a significant density of lattice-constitutional valence-band free holes. As a consequence of the unique electronic pr...

Author-supplied keywords

  • colloidal nanocrystals
  • copper sulfide
  • covellite
  • discrete dipole approximation
  • localized surface plasmon resonance
  • shape control
  • transient absorption spectroscopy

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

Cite this document

Choose a citation style from the tabs below