Using quartz crystal microbalances to simultaneously sense mass accumulation and solution properties [Book Chapter]
Conference
·
· TRANSDUCERS '91: 1991 International Conference on Solid-State Sensors and Actuators. Digest of Technical Papers
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
A lumped-element equivalent circuit model is presented that describes the near resonance electrical characteristics of a quartz crystal microbalance (QCM) simultaneously loaded by a surface mass layer and a contacting liquid. The model was derived by solving the boundary-value problem for coupled mechanical displacement and electrical potential; this results in circuit elements that are explicitly related to physical properties of the quartz, the perturbing mass layer, and the contacting liquid. The effects of mass and/or liquid loading on the admittance-vs.-frequency behavior are predicted from the model and compared with experimental impedance analyzer measurements. Surface mass accumulation causes a simple translation in frequency of the resonance peak, while increasing the density-viscosity product of the contacting solution causes both a translation and damping of the resonance peak. Using the model, changes in surface mass can be differentiated from changes in solution properties.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5883194
- Report Number(s):
- SAND--91-0064C; CONF-9106116--4; ON: DE91011501; ISBN: 0-87942-585-7
- Conference Information:
- Journal Name: TRANSDUCERS '91: 1991 International Conference on Solid-State Sensors and Actuators. Digest of Technical Papers
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400100* -- Analytical & Separations Chemistry
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
BALANCES
CALIBRATION
CHALCOGENIDES
DISPERSIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEASURING METHODS
MICROBALANCES
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
QUARTZ
RESONANCE
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
TESTING
TIME DEPENDENCE
WEIGHT INDICATORS
400100* -- Analytical & Separations Chemistry
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
BALANCES
CALIBRATION
CHALCOGENIDES
DISPERSIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEASURING METHODS
MICROBALANCES
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
QUARTZ
RESONANCE
SILICON COMPOUNDS
SILICON OXIDES
SOLUTIONS
TESTING
TIME DEPENDENCE
WEIGHT INDICATORS