Synthesis and Photovoltaic Properties of Cd3As2 Faceted Nanoplates and Nano-Octahedrons

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• 作者：Cai-Zhen Li ; Rui Zhu ; Xiaoxing Ke ; Jing-Min Zhang ; Li-Xian Wang ; Liang Zhang ; Zhi-Min Liao ; Da-Peng Yu
• 刊名：Crystal Growth & Design
• 出版年：2015
• 出版时间：July 1, 2015
• 年：2015
• 卷：15
• 期：7
• 页码：3264-3270
• 全文大小：602K
• ISSN：1528-7505

文摘

Recent theoretical predictions and angle-resolved photoemission spectroscopy measurements have shown that single crystal Cd₃As₂ is a three-dimensional topological Dirac semimetal possessing linear dispersions along all three momentum directions. Nanoscale topological Dirac semimetal structures have a large surface-to-volume ratio and provide a platform to explore its topological surface states. Here we report the synthesis of high quality Cd₃As₂ single crystalline nanoplates and nano-octahedrons via a vapor鈥搒olid growth mechanism. Triangular and hexagonal nanoplates with lateral dimensions ranging from several hundred nanometers to tens of micrometers are obtained. The top facets are (112), consistent with the natural cleavage plane of Cd₃As₂ single crystal. The synthesized Cd₃As₂ nano-octahedrons are enclosed by the {112} facets. A photovoltaic effect is demonstrated from a Cd₃As₂ nanoplate/metal electrode interface, suggesting potential applications in self-powered photodetection.