Synthesis and growth twinning of γ-Al2O3 nanowires by simple evaporation of Al-Si alloy powder

被引:7
作者
Chang, Chia-Cheng [1 ]
Wu, Jyun-Lin [1 ]
Yang, Nai-Hao [1 ]
Lin, Su-Jien [1 ]
Chang, Shou-Yi [2 ]
机构
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan
[2] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 40227, Taiwan
来源
CRYSTENGCOMM | 2012年 / 14卷 / 03期
关键词
ALUMINA NANOSTRUCTURES; CONTROLLABLE SYNTHESIS; ROOM-TEMPERATURE; GAMMA-ALUMINA; NANOBELTS; METHANE; PHOTOLUMINESCENCE; COMBUSTION; CATALYST;
D O I
10.1039/c1ce05758h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this study, single-crystalline gamma-Al2O3 nanowires were synthesized by simple evaporation of Al-Si alloy source powder at 1070 degrees C under different working pressures. The structures and growth mechanisms of the nanowires were examined. Under a low working pressure of 0.5 torr, uniform nanowires with a catalyst particle were synthesized by a vapor-liquid-solid mechanism and grew along a [2-20] direction. Twinning occurred parallel to nanowire growth direction and a twin angle of 15.5 degrees/164.5 degrees was identified. As the pressure increased, zigzag nanowires without a catalyst grew along a [-1-11] direction alternatively via a vapor-solid route. Twinning also formed with an angle of 15.5 degrees/164.5 degrees. Perpendicular twinning planes to the growth direction induced the deflected feature of the nanowires.
引用
收藏
页码:1117 / 1121
页数:5
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