Size-dependent crystalline fluctuation and growth mechanism of bismuth nanoparticles under electron beam irradiation.
Advanced nanofabrication requires accurate tailoring of various nanostructures with the assistance of electron or ion beam irradiation. However, evolution of the nanostructures under the beam irradiation significantly affects the fabrication process. It is thus of paramount importance to study the evolution behaviors and growth mechanism of the nanostructures. In this study, bismuth nanoparticles were selected to investigate crystalline fluctuation under electron beam irradiation via transmission electron microscopy. The results disclose size-dependent crystalline fluctuation of the nanoparticles. The particles exhibit crystalline and non-crystalline features for sizes of above 15 and below 4 nm, respectively, while a mixture of the two states is observed with sizes in between. The crystalline fluctuation facilitates the growth process of the particles when a crystalline particle is in contact with another non-crystalline one. This is promising for applications in nanofabrication where high quality interfaces are desired between two joining parts.
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. sujuan.wu@cqu.edu.cn lidong.sun@cqu.edu.cn and Electron Microscopy Center of Chongqing University, Chongqing University, Chongqing 400044, China.
Sujuan
S
Wu
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. sujuan.wu@cqu.edu.cn lidong.sun@cqu.edu.cn and Electron Microscopy Center of Chongqing University, Chongqing University, Chongqing 400044, China.
Yi
Y
Jiang
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. sujuan.wu@cqu.edu.cn lidong.sun@cqu.edu.cn and Electron Microscopy Center of Chongqing University, Chongqing University, Chongqing 400044, China.
Lijun
L
Hu
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. sujuan.wu@cqu.edu.cn lidong.sun@cqu.edu.cn and Electron Microscopy Center of Chongqing University, Chongqing University, Chongqing 400044, China.
Jianguo
J
Sun
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. sujuan.wu@cqu.edu.cn lidong.sun@cqu.edu.cn and Electron Microscopy Center of Chongqing University, Chongqing University, Chongqing 400044, China.
Piaopiao
P
Wan
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. sujuan.wu@cqu.edu.cn lidong.sun@cqu.edu.cn.
Lidong
L
Sun