Large-scale production of ultrathin topological insulator bismuth telluride nanosheets by a hydrothermal intercalation and exfoliation route
Large-scale production of ultrathin topological insulator bismuth telluride nanosheets by a hydrothermal intercalation and exfoliation route
复制标题
水热插层剥离路线大规模生产超薄拓扑绝缘体碲化铋纳米片
DOI：
10.1039/c2jm15973b
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Zhong, Jianxin
中科院分区：
文献类型：
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作者：
Ren, Long;Qi, Xiang;Zhong, Jianxin
报道了一种简便的水热插层/剥离法制备碲化铋（Bi 2 Te 3）纳米片。在普通的水热工艺中，可以使用乙二醇的还原能力将锂阳离子插入Bi 2 Te 3的层之间，并且通过在随后的剥离工艺中去除锂来获得厚度仅为3-4 nm的高质量Bi 2 Te 3纳米片。扫描电子显微镜、透射电子显微镜和拉曼光谱表征表明，成功地获得了高产量、高质量的Bi 2 Te 3纳米片，其尺寸达到200 nm宽和1 μm长。这种水热插层/剥离方法是通用的，因为它已经扩展到其他层状材料，如Bi 2Se 3和MoS 2。我们的研究结果提出了一个简单的路线，大规模生产的薄而平坦的Bi 2 Te 3纳米片，这可能是有益的，进一步的电子和自旋电子学应用。
A convenient hydrothermal intercalation/exfoliation method for large-scale manufacturing of bismuth telluride (Bi2Te3) nanosheets is reported here. Lithium cations can be intercalated between the layers of Bi2Te3 using the reducing power of ethylene glycol in the common hydrothermal process, and high quality Bi2Te3 nanosheets with thickness down to only 3–4 nm are obtained by removing lithium in the following exfoliating process. Scanning electron microscopy, transmission electron microscopy and Raman spectrum characterizations confirm that the high yield of Bi2Te3 nanosheets with good quality were successfully achieved and the sizes of the immense nanosheets reached 200 nm width and 1 μm length. This hydrothermal intercalation/exfoliation method is general, as it has been extended to other layered materials, such as Bi2Se3 and MoS2. Our results suggest a simple route for the large-scale production of thin and flat Bi2Te3 nanosheets, which may be beneficial to further electronic and spintronics applications.