铝热反应法制备双股类螺旋Zn2SnO4单晶纳米带 |
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作者姓名: | 王煜 陈静 廖清 孙伟 厉建龙 张建平 吴凯 |
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作者单位: | 1. 北京大学化学与分子工程学院,北京分子科学国家实验室,北京100871 2. 中国科学院化学研究所,北京100190 3. 中国人民大学化学系,北京100872 |
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摘 要: | This paper reports the preparation in large quantity of bifilar helix-like nanobelts of single crystal ine Zn2SnO4, a face-centered cubic spinel and transparent semiconductor that possesses wide applications in photovoltaic devices and sensors for humidity and combustible gases, by using a unique approach that combines chemical vapor deposition, aluminothermal reaction, vapor-liquid-solid growth, mergence of polar planes, and kinetic control by steady-state turbulent flow. The bifilar helix-like nanobelt was formed by the twisting and merging of two independent Zn2SnO4 nanobelts, as analyzed by scanning electron microscopy, transmission electron microscopy, electron diffraction, X-ray diffraction, Raman spectroscopy, and photoluminescence. It had a periodicity along the axial direction and hence, is actual y a super-lattice material. The photoluminescence measurements showed a strong light emission at 326.1 nm from the as-prepared sample with a line width of about 1.5 nm. The combined approach used in this study, in particular its aluminothermal reaction and steady-state turbulent gas flow perturbation steps, may be helpful in preparing other similar materials.
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关 键 词: | Bifilar helix-like nanobelt Zn2SnO4 Aluminothermal reaction approach Photoluminescence |
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