Adsorption and manipulation of carbon onions on highly oriented pyrolytic graphite studied with atomic force microscopy |
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| Authors: | Jianfeng Zhou Shimin Hou Zengquan Xue Zhennan Gu |
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| Institution: | a Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, PR China
b College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China |
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| Abstract: | Carbon onions produced by DC arc discharge method were deposited on highly oriented pyrolytic graphite (HOPG) surface and their adsorption and manipulation was studied using an atomic force microscopy (AFM). Well-dispersed adsorption of carbon onions on HOPG surface was obtained and aggregations of onions were not observed. The van der Waals interaction between the onion and HOPG surface and that between two onions, were calculated and discussed using Hamaker's theory. The manipulation of adsorbed onions on HOPG surface was realized using the AFM in both the raster mode and the vector mode. The controllability and precision of two manipulation modes were compared and the vector mode manipulation was found superior, and is a useful technique for the construction of nano-scale devices based on carbon onions. |
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| Keywords: | 61 48 +c 68 65 &minus k 81 16 Ta 68 37 Ps |
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