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Content Provider | IEEE Xplore Digital Library |
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Author | Sankaranarayanan, S.K.R.S. Singh, R. Bhethanabotla, V. |
Copyright Year | 2010 |
Description | Author affiliation: Center for Nanoscale Materials, Argonne National Laboratory, IL, 60439, USA (Sankaranarayanan, S.K.R.S.) || Sensors Research Laboratory, Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, 33620, USA (Singh, R.; Bhethanabotla, V.) |
Abstract | The mass sensitivity (> 1 micrograms) of current commercial analytical instruments, such as thermal gravimetric analyzers, severely limits their utility for measurement of valuable but poorly soluble materials such as synthetic proteins or DNA fragments. A quartz crystal microbalance (QCM), based on a transverse shear mode piezoelectric crystal operating at high frequencies, is gaining popularity in chemical and bio-sensing applications due to higher mass sensitivities as compared to the traditional analyzers and lesser sensitivity to vibrations. However, these devices suffer from non-uniformity of sensitivity distribution along the sensor surface thereby limiting their use for the determination of mass. Overcoming this limitation would lead to the development of a robust sensor with improved mass sensitivities and reduced sensitivity to vibrations, as compared to the currently available microbalances. The sensitivity profile can be influenced by a number of factors the electrode design and surface properties of the crystal. In the current work, we develop a finite element (FE) model of the QCM to investigate the mass sensitivity and its radial distribution on the sensor surface for various electrode designs. Such a model will aid in the development of versatile nano-balances with a uniform sensitivity distribution. |
Starting Page | 1883 |
Ending Page | 1886 |
File Size | 534180 |
Page Count | 4 |
File Format | |
ISBN | 9781424481705 |
ISSN | 19300395 |
e-ISBN | 9781424481699 |
e-ISBN | 9781424481682 |
DOI | 10.1109/ICSENS.2010.5690037 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2010-11-01 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Sensitivity Electrodes Crystals Analytical models Finite element methods Gold Shearing |
Content Type | Text |
Resource Type | Article |
Subject | Electrical and Electronic Engineering |
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