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.
| Original language | English |
|---|---|
| Pages (from-to) | 233-238 |
| Number of pages | 6 |
| Journal | Analytica Chimica Acta |
| Volume | 611 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 24 Mar 2008 |
Bibliographical note
Funding Information:The authors thank New Energy and Industrial Technology Development Organization (NEDO) of Japan for partial financial support. S.M. Chang acknowledges partial financial support provided by KOSEF (Korea, R01-2005-000-10245-0).
Keywords
- Atomic force microscopy
- Long tip
- Optimal tip length
- Oscillation damping
- Polymeric tip
- Tip design