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 language | English |
|---|---|
| Pages (from-to) | 1937-1939 |
| Number of pages | 3 |
| Journal | Journal of the American Ceramic Society |
| Volume | 90 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2007 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry
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Synthesis and optical properties of mullite nanowires. / Seong, Han Kyu; Kim, Ungkil; Kim, Myoung Ha; Choi, Heon Jin; Lee, Youngho; Seo, Won Seon.
In: Journal of the American Ceramic Society, Vol. 90, No. 6, 01.06.2007, p. 1937-1939.Research output: Contribution to journal › Article
TY - JOUR
T1 - Synthesis and optical properties of mullite nanowires
AU - Seong, Han Kyu
AU - Kim, Ungkil
AU - Kim, Myoung Ha
AU - Choi, Heon Jin
AU - Lee, Youngho
AU - Seo, Won Seon
PY - 2007/6/1
Y1 - 2007/6/1
N2 - 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).
AB - 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).
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U2 - 10.1111/j.1551-2916.2007.01699.x
DO - 10.1111/j.1551-2916.2007.01699.x
M3 - Article
AN - SCOPUS:34249862888
VL - 90
SP - 1937
EP - 1939
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 6
ER -