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Cu-Sb-S Ternary Semiconductor Nanoparticle Plasmonics.

Guoning Liu1, Shaopeng Qi1, Jinxi Chen1

  • 1School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Devices, Southeast University, No. 2 Southeast University Road, Nanjing 211189, P. R. China.

Nano Letters
|March 11, 2021
PubMed
Summary

Researchers developed a new synthesis method for tunable semiconductor nanocrystals. These antimony-doped copper sulfide nanocrystals exhibit localized surface plasmon resonance (LSPR) across a wide spectral range.

Keywords:
antimony-doped copper sulfidecolloidal synthesisdopinglocalized surface plasmon resonancetunability

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Semiconductor plasmonics is an emerging field utilizing semiconductor nanocrystals.
  • Tunable plasmonics in these materials is highly desirable for various applications.
  • Current synthetic methods present challenges in achieving tunable semiconductor nanocrystals.

Purpose of the Study:

  • To develop a novel colloidal synthesis strategy for tunable semiconductor nanocrystals.
  • To investigate the plasmonic properties of antimony-doped copper sulfide nanocrystals (Sb-CuS NCs).
  • To establish the relationship between carrier concentration and localized surface plasmon resonance (LSPR) spectra.

Main Methods:

  • Colloidal synthesis of highly dispersed, platelet-shaped Sb-CuS NCs.
  • Characterization of nanocrystal morphology and composition.
  • Quantification of plasmonic features, including LSPR band tunability.
  • Analysis of carrier concentration effects on LSPR spectra.

Main Results:

  • Successful synthesis of Sb-CuS NCs with tunable LSPR from near-infrared to mid-visible range.
  • Demonstration of a wide and fine tunability in ternary semiconductor plasmonics.
  • Elucidation of carrier concentration requirements for a continuum of LSPR spectra.
  • Achieved highly dispersed and platelet-shaped nanocrystal morphology.

Conclusions:

  • The developed colloidal synthesis strategy enables tunable plasmonics in semiconductor nanocrystals.
  • Sb-CuS NCs offer a promising platform for advanced plasmon-related applications.
  • This work expands the capabilities of ternary semiconductor plasmonics beyond binary systems.