Calibration of piezoelectric bimorphs for experiments in a surface forces apparatus

Sung Chul Bae; Steve Granick

doi:10.1063/1.1288233

Calibration of piezoelectric bimorphs for experiments in a surface forces apparatus

Sung Chul Bae, Steve Granick

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Pages (from-to)	3955-3957
Number of pages	3
Journal	Review of Scientific Instruments
Volume	71
Issue number	10
DOIs	https://doi.org/10.1063/1.1288233
State	Published - Oct 2000

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Instrumentation

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10.1063/1.1288233

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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.",

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AB - 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.

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Calibration of piezoelectric bimorphs for experiments in a surface forces apparatus

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