Nanoscale heterogeneous structures in GeO2-GeS2 glasses

Nobuaki Terakado, Keiji Tanaka

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Atomic bonding structures in xGeO2-(100 - x)GeS2 glasses have been studied through structural and chemical experiments. Atomic force microscope images in alkali-etched samples with x = 80 mol % show nano-scale dips, which are ascribable to isolated GeS2 clusters. Transmission electron microscope images and small angle X-ray scattering patterns suggest that the glass with x ≈ 50 has pronounced heterogeneous structures in nanoscales. Composition dependence of an etching rate exhibits a characteristic change at x = 60, which can be interpreted as a percolation threshold of tetrahedral GeS4 units. These results support a nanostructure model for the oxy-chalcogenide glass.

Original languageEnglish
Pages (from-to)7972-7974
Number of pages3
JournalJapanese Journal of Applied Physics
Issue number10 PART 1
Publication statusPublished - 2008 Oct


  • AFM
  • Chalcogenide
  • GeO
  • GeS
  • Nanostructure
  • Oxide
  • Oxy-chalcogenide
  • SAXS
  • TEM


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