Journal article
Mass detection sensitivity of piezoelectric cantileverswith a nonpiezoelectric extension
Review of scientific instruments, v 77(6), pp 065101-065101-10
06 Jun 2006
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
A piezoelectric cantilever (PEC) is a transverse transducer consisting of a piezoelectric layer, e.g., lead zirconate titanate (PZT), bonded to a nonpiezoelectric layer, e.g., stainless steel, which has a uniform cross section throughout the length. A PEC with a thin nonpiezoelectric extension, on the other hand, has two distinctive sections each with its own thickness and transverse mass-density and elastic-modulus profiles. A piezoelectric cantilever with a nonpiezoelectric extension has been increasingly used as an
in situ
biosensor that has the advantage of dipping only the nonpiezoelectric extension part in an aqueous solution without electrically insulating the piezoelectric section. In this study, we examined both experimentally and theoretically the effect of the thin nonpiezoelectric extension, in particular, its length ratio to the piezoelectric part on the vibration wave form and mass detection sensitivity of a PEC. We showed that the nonpiezoelectric extension caused substantial distortion to the vibration wave form. Due to the wave form distortion, the mass detection sensitivity of a PEC with a nonpiezoelectric extension can be higher than that of a PEC of the same length without a nonpiezoelectric extension. Using PECs consisting of a
0.25
mm
thick PZT layer and a
0.07
mm
thick stainless steel of various lengths,
l
1
, and a
0.07
mm
thick nonpiezoelectric stainless steel extension of various lengths,
l
2
, we showed that for any
l
1
, the maximum mass detection sensitivities of first, second, and third modes occurred at
l
2
∕
l
1
=
0.6
, 0.28, and 0.16 and the maximum values were, respectively, 1.42, 3.9, and 6.7 times the mass detection sensitivity of a PEC of the same
l
1
without a nonpiezoelectric extension.
Metrics
Details
- Title
- Mass detection sensitivity of piezoelectric cantileverswith a nonpiezoelectric extension
- Creators
- Zuyan Shen - Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104Wan Shih - Drexel UniversityWei-Heng Shih - Drexel University
- Publication Details
- Review of scientific instruments, v 77(6), pp 065101-065101-10
- Publisher
- American Institute of Physics
- Grant note
- NAG2-1475 / NASA R82960401 / UNSPECIFIED 1 R01 EB000720 / NIH
- Resource Type
- Journal article
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems; Materials Science and Engineering
- Web of Science ID
- WOS:000238732800057
- Scopus ID
- 2-s2.0-33745700173
- Other Identifier
- 991019167580204721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Instruments & Instrumentation
- Physics, Applied