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2000
Volume 11, Issue 1
  • ISSN: 2405-4615
  • E-ISSN: 2405-4623

Abstract

Background

Semiconductor-doped materials have been treated actively throughout the last decades and continue to be of great interest because of the challenged features due to various nanosize effects. Among other semiconductors, copper chalcogenides demonstrate the interesting plasmonic properties in line with quantum confinement effects provided by the size factor.

Objective

This study aims to study the structural and optical features of the sol-gel-derived silica glasses with copper selenide nanoparticles, demonstrating the appearance of the plasmonic light absorption in the near IR range.

Methods

The samples under study were fabricated through an original sol-gel technique, which realized the simultaneous synthesis of copper selenide and sintering of mesoporous silica. The copper selenide glasses were characterized with X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and optical absorption spectroscopy.

Results

Formation of nanocrystalline CuSe particles of the size range from 10 nm through 100-150 nm is established with XRD and TEM techniques. The principal optical properties are presented by the featured absorption in the visible and near-IR ranges. E was evaluated for the direct transitions in the range of 2.10-2.36 eV. The plasmonic resonance in the nanoparticles due to increased carrier concentration originated by intrinsic deficiency of CuSe nanoparticles with variable stoichiometry. Its energy can be controlled by the Cu/Se ratio in the synthesis procedure.

Conclusion

The silica sol-gel glasses with copper selenide nanoparticles were fabricated and characterized by XRD and TEM methods, and their optical absorbance spectra were investigated. The principal optical properties are presented by the featured absorption in the visible and near-IR ranges: the step-like proper absorption of the semiconductor particles characterized by E and the intense near-IR band is associated with the localized plasmonic resonance in the nanoparticles due to increased carrier concentration.

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2026-02-26

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Structural Study on the Novel Plasmonic Optical Materials with Copper Selenide Nanoparticles
Curr. Nanomater. 11, 106 (2026); https://doi.org/10.2174/0124054615293065240909100649
/content/journals/cnm/10.2174/0124054615293065240909100649
/content/journals/cnm/10.2174/0124054615293065240909100649
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  • Article Type:     Research Article
Keyword(s): band gap; copper selenide; electronic microscopy; nanoparticles; plasmonic resonance; Sol-gel glasses; X-ray diffraction

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