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Advanced tip design for liquid phase vibration mode atomic force microscopy |
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| Authors: | Muramatsu Hiroshi Yamamoto Yuji Shigeno Masatsugu Shirakawabe Yoshiharu Inoue Akira Kim Woo-Sik Kim Seung Jin Chang Sang-Mok Kim Jong Min |
| Institution: | a School of Bionics, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan b Technology Center, Seiko Instruments Inc., 563 Takatsukashinden, Matsudo, Chiba 271-2222, Japan c Department of Chemical Engineering, Kyunghee University, Kyungki-Do 449-701, Republic of Korea d Department of Chemical Engineering, Hadan 840, Saha-Gu, Busan 604-714, Republic of Korea |
| Abstract: | We have fabricated polymer tips for atomic force microscopy in order to elucidate the effects of tip length and shape on cantilever vibration damping in liquids. The vibration damping is investigated by measuring the vibration amplitude of cantilevers as a function of tip-sample distance. The cantilever with a short tip provides a higher damping effect over long tip-sample distances. When the vibration amplitude was rescaled to show the effect of the cantilever width on oscillation damping, the vibration amplitude of cantilevers with various tip lengths was similarly obtained in a long distance range over 50 μm. This similarity is explained by an acoustic damping model in which an acoustic wave is generated by the cantilever. Finally, the results indicate a cantilever with a sufficiently long tip compared to the cantilever width can dramatically reduce the long-range damping effect in a liquid environment. |
| Keywords: | Atomic force microscopy Polymeric tip Long tip Tip design Oscillation damping Optimal tip length |
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