NANOBUBBLES AT THE LIQUID/SOLID INTERFACE STUDIED BY ATOMIC FORCE MICROSCOPY
Lou Shi-tao (楼柿涛)a, Gao Jian-xia (高剑侠)a, Xiao Xu-dong (萧旭东)b, Li Xiao-jun (李晓军)a, Li Guang-lai (李光来)a, Zhang Yi (张益)a, Li Min-qian (李民乾)a, Sun Jie-lin (孙洁林)c, Hu Jun (胡均)ac
a Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China; b Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China; c Bio-X Research Center, Shanghai Jiaotong University, Shanghai 200030, China
Abstract Bubbles on the nanometer scale were produced by a special method on solid surfaces. Atomic Force Microscopy (AFM) was used to detect these bubbles. It shows that nanobubbles can be seen clearly in the interfaces of liquid/graphite and liquid/mica. In AFM images, the nanobubbles appeared like bright spheres. Some of the bubbles kept stable for hours during the experiments. The bubbles were disturbed under high load during AFM imaging. The conformation of the bubbles is influenced by the atomic steps on the graphite substrate. In addition, a shadow was found around the bubbles, which was due to the interactions between a bubble adhered to the tip and a bubble on the substrate.
Received: 28 March 2001
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 19725415, 19744004, 19890380, and 19875075) and by Chinese Academy of Sciences and Science Committee of Shanghai (Grant Nos. KJ 951-A1-603, KJ 951-A1-409 and ST2-2-16).
Cite this article:
Lou Shi-tao (楼柿涛), Gao Jian-xia (高剑侠), Xiao Xu-dong (萧旭东), Li Xiao-jun (李晓军), Li Guang-lai (李光来), Zhang Yi (张益), Li Min-qian (李民乾), Sun Jie-lin (孙洁林), Hu Jun (胡均) NANOBUBBLES AT THE LIQUID/SOLID INTERFACE STUDIED BY ATOMIC FORCE MICROSCOPY 2001 Chinese Physics 10 108
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