Growth and surface potential characterization of Bi2Te3 nanoplates
Guolin Hao,
Xiang Qi,
Liwen Yang,
Yundan Liu,
Jun Li,
Long Ren,
Fu Sun,
Jianxin Zhong
Affiliations
Guolin Hao
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Xiang Qi
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Liwen Yang
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Yundan Liu
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Jun Li
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Long Ren
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Fu Sun
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Jianxin Zhong
Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105, People's Republic of China
Topological insulator Bi2Te3 nanoplates with hexagonal, triangular and truncated triangular nanostructures have been fabricated with thickness of ∼10 nm by vacuum vapor phase deposition method. The possible formation mechanism of Bi2Te3 nanoplates with different nanostructures has been proposed. We have examined the surface potentials of Bi2Te3 nanoplates using Kelvin probe force microscopy. The surface potential of Bi2Te3 nanoplates is determined to be about 482 mV on the SiO2/Si substrate, 88 mV and -112 mV on the n-doped and p-doped Si (111) substrates, respectively. The surface potential information provides insight into understanding electronic properties of Bi2Te3 nanoplates, which may open a new door to the exploration of the topological insulators.
