Preparation of nanocomposite for optical application using ZnTe nanoparticles and a zero-birefringence polymer

Chie Inui, Hiroaki Kura, Tetsuya Sato, Yosuke Tsuge, Seimei Shiratori, Hisanori Ohkita, Akihiro Tagaya, Yasuhiro Koike

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Surface-modified ZnTe nanoparticles were mixed in a zero-birefringence polymer matrix. Transmission electron microscopy images revealed that aggregates of ZnTe nanoparticles with a diameter of 20 nm were uniformly dispersed in the polymer. The transmittance of ZnTe nanocomposites rapidly decreased at wavelengths shorter than the critical wavelength corresponding to the band gap of ZnTe nanoparticles, an effect which became significant as the volume fraction of particles increased. In this way, the optical characteristic of ZnTe nanoparticles was added to the polymer. The intrinsic zero-birefringence was confirmed in the heat-drawn ZnTe nanocomposites. As the ZnTe nanocomposites were left in air, a lowering of transmittance was observed. This was due to the oxidation of Zn and the resultant deposition of Te in the ZnTe nanocomposite, as the light absorption of Te is significant. The formation of oxygen non-permeable SiO2 films onto the ZnTe nanocomposite by the sol-gel method was useful in preventing oxidation so that the decrement of transmittance decreased from 47.2% to 14.9% at 530 nm near the ZnTe band gap.

Original languageEnglish
Pages (from-to)8144-8149
Number of pages6
JournalJournal of Materials Science
Volume42
Issue number19
DOIs
Publication statusPublished - 2007 Oct 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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