Abstract
Noise measurements were performed to determine the quality factor Q and the resonating frequency shift as a function of gas pressure P for microcantilevers with modified surfaces and geometries. In the molecular and continuum regimes, energy loss is dominated by the surrounding fluid leading to reduction of the Q factor and shift of the resonance frequency by Delta f, which becomes significant in the continuum regime showing sensitivity on surface changes. This is shown via three methods: frequency shift Delta f vs. P, Q factor vs. P, and direct calculation using surface roughness details acquired via atomic force microscopy. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4744951]
Original language | English |
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Article number | 061908 |
Pages (from-to) | 061908-1-061908-4 |
Number of pages | 4 |
Journal | Applied Physics Letters |
Volume | 101 |
Issue number | 6 |
DOIs | |
Publication status | Published - 6-Aug-2012 |
Keywords
- NANOELECTROMECHANICAL SYSTEMS
- NANOCRYSTALLINE-DIAMOND
- RESONATORS
- FRICTION