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Xu T, Zhang H, Ye M, Zhu Y, Yuan D, Li W, Zhou Y, Sun L. Controllable fabrication of hollow In 2O 3 nanoparticles by electron beam irradiation. NANOSCALE 2022; 14:12569-12573. [PMID: 35975472 DOI: 10.1039/d2nr03276g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A growth strategy is presented for controllable fabrication of hollow In2O3 nanoparticles (NPs) via oxidation of In nanocrystals under electron beam irradiation. The morphology of the NPs can be tailored by changing the electron beam energy and current density. Yolk-shell NPs are preferentially formed under 200 keV electron beam irradiation, while hollow NPs are preferentially formed at 300 keV. This work confirms that electron beam irradiation is a valuable method for the engineering and modification of nanomaterials.
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Affiliation(s)
- Tao Xu
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
| | - Hao Zhang
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
| | - Mao Ye
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
| | - Yatong Zhu
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
| | - Dundong Yuan
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
| | - Wei Li
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
| | - Yilong Zhou
- Thermo Fisher Shanghai Nanoport, Thermo Fisher Electronic Technology Research and Development (Shanghai) Co., Ltd., Shanghai, 201203, P. R. China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing 210096, P. R. China.
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Shi L, He L, Shangguan L, Zhou Y, Wang B, Zhang L, Yang Y, Teng C, Sun L. Revealing the Phase Segregation and Evolution Dynamics in Binary Nanoalloys via Electron Beam-Assisted Ultrafast Heating and Cooling. ACS NANO 2022; 16:921-929. [PMID: 35023713 DOI: 10.1021/acsnano.1c08500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Gas-phase synthesized binary nanoparticles (NPs) possess ultraclean surfaces, which benefit versatile uses in sensors and catalysts. However, precise control of their configuration and properties is still a big challenge because the growth mechanism and phase evolution dynamics in these NPs are very hard to unveil. Here, we report a strategy to investigate the phase evolution dynamics in binary NPs by using e-beam assisted ultrafast local heating and cooling inside a transmission electron microscope. With this strategy, the phase segregation and corresponding shape evolution of PbBi NPs are in situ revealed. It is found that the as-prepared PbBi alloy NPs will transform into heterostructures under e-beam stimulated structural relaxation, leading to the formation of featured Janus configurations with faceted Bi polyhedron parts and intermetallic hemisphere parts. During phase segregation, Pb1Bi1 and Pb7Bi3 phases are captured and identified, and a model of phase and shape evolution of PbBi nanoalloys is developed and contrasted with that of their bulk counterparts. These findings benefit the understanding of the phase dynamics of binary NPs and can provide in-depth information for engineering their structures for practical applications.
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Affiliation(s)
- Lei Shi
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University, Suzhou, 215123, P. R. China
| | - Longbing He
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University, Suzhou, 215123, P. R. China
| | - Lei Shangguan
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
| | - Yilong Zhou
- Thermo Fisher Shanghai Nanoport, Thermo Fisher Electronic Technology Research and Development (Shanghai) Co., Ltd., Shanghai, 201203, P. R. China
| | - Binjie Wang
- Thermo Fisher Shanghai Nanoport, Thermo Fisher Electronic Technology Research and Development (Shanghai) Co., Ltd., Shanghai, 201203, P. R. China
| | - Lei Zhang
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
| | - Yufeng Yang
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
| | - Chunyu Teng
- China Aero-Polytechnology Establishment, Beijing, 100028, P. R. China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University, Suzhou, 215123, P. R. China
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