Synthesis and optical properties of mullite nanowires

Han Kyu Seong, Ungkil Kim, Myoung Ha Kim, Heon Jin Choi, Youngho Lee, Won Seon Seo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Single-crystalline mullite (3Al2O3·2SiO2) nanowires have been synthesized on silicon substrates by forcing aluminum and chromium chloride powders to react under an ammonia gas flow. The diameter and length of the nanowires have uniform diameters of <100 nm and several micrometers, respectively. High-resolution transmission electron microscope and selected-area electron diffraction analyses indicated that the nanowires were almost structural defect free and had a single-crystalline phase with a 〈0001〉 growth direction. The photoluminescence spectra showed that the mullite nanowires reached an emission peak at the center wavelength of 442 nm originating from the Al-O bonds in preference to the Al-O and Si-O bonds in the mullite bonding structure. Comparison of the photoluminescence between as-synthesized, oxygen-annealed, and plasma-etched nanowires indicates that the nanowires have few defects (i.e., oxygen vacancies).

Original languageEnglish
Pages (from-to)1937-1939
Number of pages3
JournalJournal of the American Ceramic Society
Volume90
Issue number6
DOIs
Publication statusPublished - 2007 Jun 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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