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分散良好的二氧化锡纳米团簇制备以及离子液体诱导金属绝缘相变调控研究
刘忠虎1, 陈 星1, 朱一羽1, 赵思涵1, 王志强1, 王 峰1, 孟强强1, 朱 雷1, 张勤芳2, 王保林3, 樊乐乐*1
1.盐城工学院,江苏省新型环保重点实验室,盐城 224051;2.盐城工学院材料科学与工程学院,盐城 224051;3.南京师范大学物理科学与技术学院,南京 210023
摘要:
本文利用气相纳米团簇设备实现SnO2纳米团簇的可控制备. 高分辨透射电子显微镜用来分析SnO2纳米团簇形貌及微观结构,结果表明制备的SnO2纳米团簇分散良好,尺寸均匀(5∽7 nm). 通过门电压控制的离子液体实现对SnO2纳米团簇金属绝缘转变的调控. 结合第一性原理,从氧空位诱导电子占据角度系统分析了相应的调控机制.
关键词:  二氧化锡纳米团簇,离子液体,氧空位,金属绝缘转变
DOI:10.1063/1674-0068/cjcp1903049
分类号:
基金项目:
Well Dispersed SnO2 Nanoclusters Preparation and Modulation of Metal-Insulator Transition Induced by Ionic Liquid
Zhong-hu Liu1, Xing Chen1, Yi-yu Zhu1, Si-han Zhao1, Zhi-qiang Wang1, Feng Wang1, Qiang-qiang Meng1, Lei Zhu1, Qin-fang Zhang2, Bao-lin Wang3, Le-le Fan*1
1.Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, China;2.School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China;3.School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
Abstract:
Tin dioxide (SnO2) has attracted broad interest due to its particular gas-sensor property. Nano- or atom-scale SnO2 material has always been the aim in order to ultimately improve the sensitivity. However, until now, it remains difficult to synthesize SnO2 nanoclusters by using traditional methods. In the present work, we have achieved the preparation of SnO2 nanoclusters by using the cluster beam deposition technique. The obtained nanoclusters were well characterized by high resolution transmission electron microscope HR-TEM. Results indicated the formation of the well-dispersed SnO2 nanoclusters with uniform size distribution (5-7 nm). Furthermore, an obvious metal insulator transition was observed by gating with ionic liquid. Combined with theory calculation, the corresponding mechanism was systematically analyzed from oxygen vacancy induced electron doping.
Key words:  SnO2 nanoclusters, Ionic liquid, Oxygen vacancy, Metal-insulator transition