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- Bae, Sung Chul
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Calibration of piezoelectric bimorphs for experiments in a surface forces apparatus
- Author(s)
- Bae, Sung Chul, Granick, Steve
- Issued Date
- 2000-10
- Citation
- REVIEW OF SCIENTIFIC INSTRUMENTS, v.71, no.10, pp.3955 - 3957
- Abstract
- A simple interferometric method is described to measure the time-dependent deformation of piezoelectric bimorphs driven by ac voltage. Applying this method to a bimorph assembly used to measure viscoelastic forces in a surface forces apparatus, we find that a sinusoidal-shaped harmonic drive voltage generates sinusoidal deformation but that a triangular-shaped harmonic drive voltage fails to produce triangular-shaped deformation if the drive frequency exceeds 1/100 of the resonance frequency. Sinusoidal displacement amplitudes as small as 0.1 nm were resolved.
- Publisher
- AMER INST PHYSICS
- ISSN
- 0034-6748
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