Abstract
A high density of nanovoids between 2 and 13 nm in size was produced during the crystallization process when amorphous Al2O3 and WO3, which are 20-30% lower in density than their crystalline phases, were annealed. By contrast, no formation or growth of nanovoids was observed during the crystallization of amorphous TiO2, which has a density 2% lower than its crystalline phase. These results suggest that large differences in density between amorphous and crystalline oxides can be utilized to produce nanoporous structures.
| Original language | English |
|---|---|
| Pages (from-to) | 197-200 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 64 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2011 Jan 1 |
| Externally published | Yes |
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Keywords
- Amorphous
- Crystallization
- Nanoporous
- Oxides
- TEM
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
Cite this
Nanovoid formation through the annealing of amorphous Al2O 3 and WO3 films. / Nakamura, R.; Shudo, T.; Hirata, Akihiko; Ishimaru, M.; Nakajima, H.
In: Scripta Materialia, Vol. 64, No. 2, 01.01.2011, p. 197-200.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nanovoid formation through the annealing of amorphous Al2O 3 and WO3 films
AU - Nakamura, R.
AU - Shudo, T.
AU - Hirata, Akihiko
AU - Ishimaru, M.
AU - Nakajima, H.
PY - 2011/1/1
Y1 - 2011/1/1
N2 - A high density of nanovoids between 2 and 13 nm in size was produced during the crystallization process when amorphous Al2O3 and WO3, which are 20-30% lower in density than their crystalline phases, were annealed. By contrast, no formation or growth of nanovoids was observed during the crystallization of amorphous TiO2, which has a density 2% lower than its crystalline phase. These results suggest that large differences in density between amorphous and crystalline oxides can be utilized to produce nanoporous structures.
AB - A high density of nanovoids between 2 and 13 nm in size was produced during the crystallization process when amorphous Al2O3 and WO3, which are 20-30% lower in density than their crystalline phases, were annealed. By contrast, no formation or growth of nanovoids was observed during the crystallization of amorphous TiO2, which has a density 2% lower than its crystalline phase. These results suggest that large differences in density between amorphous and crystalline oxides can be utilized to produce nanoporous structures.
KW - Amorphous
KW - Crystallization
KW - Nanoporous
KW - Oxides
KW - TEM
UR - http://www.scopus.com/inward/record.url?scp=79251641923&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79251641923&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2010.09.043
DO - 10.1016/j.scriptamat.2010.09.043
M3 - Article
VL - 64
SP - 197
EP - 200
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
IS - 2
ER -