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Related Experiment Video

Updated: Jun 3, 2026

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
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NQR study of chalcogenide glasses Ge-As-Se.

Olga Glotova1, Irina Korneva, Nikolay Sinyavsky

  • 1Department of Physics, Adam Mickiewicz University, Poznan, Poland. glotova@amu.edu.pl

Magnetic Resonance in Chemistry : MRC
|April 1, 2011
PubMed
Summary

Nuclear quadrupole resonance (NQR) studies reveal that the Ge-As-Se glass system

Area of Science:

  • Materials Science
  • Solid State Physics
  • Chemistry

Background:

  • The Ge-As-Se chalcogenide glass system is crucial for optical and electronic applications.
  • Understanding the local atomic structure is key to tailoring material properties.

Purpose of the Study:

  • To investigate the structural evolution of Ge-As-Se glasses using nuclear quadrupole resonance (NQR).
  • To correlate structural changes with the average coordination number (r̅).

Main Methods:

  • Nuclear quadrupole resonance (NQR) spectroscopy on 75As nuclei.
  • Nutation NQR spectroscopy was employed.
  • Analysis of spectral shifts and asymmetry parameters (η).

Main Results:

  • NQR spectra of Ge-As-Se glasses showed broad lines with two peaks, attributed to the As2Se3 structural unit.

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Last Updated: Jun 3, 2026

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
08:38

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

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  • Increasing average coordination number (r̅) shifted spectral signals to higher frequencies.
  • Complex spectra emerged at r̅ > 2.54, indicating the formation of more intricate molecular structures with higher germanium content.

    • Conclusions:

    • The study elucidates the structural characteristics of Ge-As-Se glasses.
    • The average coordination number (r̅) is a critical parameter influencing the glass structure.
    • NQR spectroscopy effectively probes structural transitions in these chalcogenide materials.