Journal article
Piezoelectric cantilever sensors with asymmetric anchor exhibit picogram sensitivity in liquids
Sensors and actuators. B, Chemical, v 153(1)
2011
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We show for the first time that self-exciting and self-sensing piezoelectric cantilevers consisting only of lead zirconate titanate (PZT) measure resonance only if they are asymmetrically anchored. Symmetric-anchoring did not give rise to electrically measurable bending resonant modes in the 0–100
kHz range. Sensitivity of first and second bending mode resonances was characterized in a flow apparatus using small density changes in liquid (0.003–0.01
g/cm
3) and by dodecanethiol chemisorption at 30
pM. Density change results were consistent with existing models of submerged cantilevers, and yielded mass-change sensitivity of ∼33
ng/Hz and 217
pg/Hz for the first two modes. In chemisorption experiments, where binding was localized to 1
mm
2 distal tip of the PZT cantilever, sensitivity improved by an order of magnitude to 2
pg/Hz and 414
fg/Hz for the same two resonant modes.
Metrics
Details
- Title
- Piezoelectric cantilever sensors with asymmetric anchor exhibit picogram sensitivity in liquids
- Creators
- Harsh SharmaRamji S LakshmananBlake N JohnsonRaj Mutharasan
- Publication Details
- Sensors and actuators. B, Chemical, v 153(1)
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000289019300010
- Scopus ID
- 2-s2.0-79952488583
- Other Identifier
- 991014878524104721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Analytical
- Electrochemistry
- Instruments & Instrumentation