|
Author(s): |
Yan-hong Ding, College of Material Science and Engineering , Central South University1,3, Changsha, China，410083
Yuan-hong Tang, College of Mechanical l Engineering，Hunan University of technology1, Zhuzhou, China，412008
Yang Yang, College of Material Science and Engineering ,Hunan University2 , Changsha, China，410082 |
|
Abstract: |
Branching type micro/nano-SiO2 with centipede-like structure has been synthesized via a hydrothermal method without any catalyst. Sample surface morphology, microstructure and composition have been characterized and analyzed by scanning electron microscope (SEM), high-resolution transmission electron microscope (HRTEM), energy-dispersive spectroscope (EDS), and selective area electron diffraction (SAED). The results show that the samples exhibit centipede-like morphology，the centipede，s feet are looked like Ox horn-like and tree-like shape whose average growth rate and average characteristic length of are different in all directions. The diameter of these Ox horns and trees with branching type is getting smaller and smaller from root to tip, ranging 5nm-120nm. The micro/nano-SiO2 with centipede-like structure is amorphous. Combining with the experimental results, the dangling bonds-assisted growth mechanism is proposed and discussed.
|