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From ZnS nanobelts to ZnO/ZnS heterostructures: Microscopy analysis and their tunable optical property

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3 Author(s)
Liu, Wei ; Department of Physics, Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Beijing University of Aeronautics and Astronautics, Beijing 100191, People’s Republic of China ; Wang, Rongming ; Wang, Ning

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Ultrathin ZnS nanobelts were assembled by ultrasmall nanocrystals with oriented self assembly, which were then transformed into their single-crystal counterparts by thermal treatment in N2. ZnO/ZnS heterostructures were also obtained at elevated temperature in open air, where well aligned ZnO nanocones were grown along the ZnS nanobelts with a definite orientation relationship described as [0001]ZnS||[0001]ZnO and (1010)ZnS||(1010)ZnO. Mixed transition and tuned band gaps of the heterostructure were experimentally observed, which was in good agreement with the theoretical predications and can be interpreted based on the model of a strained staggered type-II band structure.

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Applied Physics Letters  (Volume:97 ,  Issue: 4 )