Journal article
Expression of picogram sensitive bending modes in piezoelectric cantilever sensors with nonuniform electric fields generated by asymmetric electrodes
Review of scientific instruments, v 81(12), pp 125108-125108-6
01 Dec 2010
PMID: 21198052
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Single-layer uniform cross-sectioned piezoelectric macro-cantilevers fabricated with an asymmetric electrode configuration enabled electrical measurement of picogram-sensitive resonant bending modes in liquids. Bending modes were otherwise not electrically measurable without excitation by a nonuniform electric field created by the geometric asymmetry in electrode design used. Electrode modification was confirmed by energy-dispersive X-ray spectroscopy (EDS). Mass-change sensitivity was tested using both bulk density changes and surface chemisorption experiments in a continuous flow apparatus. Significant response to density changes as small as 0.004 g/mL was measured. A sensitivity limit of similar to 1 picogram in liquid was determined from 1-dodecanethiol chemisorption experiments. The sensitivity decreased with chemisorbed mass and was log-linear over five orders of magnitude. The observed resonance responses were in agreement with previously reported models of resonating cantilever sensors. This work demonstrates experimentally for the first time that introducing electrode asymmetry enables measurement of bending modes in cantilevers containing only a single piezoelectric layer. (C) 2010 American Institute of Physics. [doi:10.1063/1.3518925]
Metrics
Details
- Title
- Expression of picogram sensitive bending modes in piezoelectric cantilever sensors with nonuniform electric fields generated by asymmetric electrodes
- Creators
- Blake N. Johnson - Drexel UniversityRaj Mutharasan - Drexel Univ, Dept Chem & Biol Engn, Philadelphia, PA 19104 USA
- Publication Details
- Review of scientific instruments, v 81(12), pp 125108-125108-6
- Publisher
- American Institute of Physics
- Number of pages
- 6
- Grant note
- CBET-0828987 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000285770800046
- Scopus ID
- 2-s2.0-78650901079
- Other Identifier
- 991019170975504721
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
- Instruments & Instrumentation
- Physics, Applied