Conference proceeding
Improved Sensitivity of TSM Sensors using a Composite Sensor-Actuator Hybrid Structure (SAHS)
2008 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM, VOLS 1 AND 2, pp 44-49
01 Jan 2008
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Thickness Shear Mode (TSM) sensors are widely employed as biosensors. One of the most important operational parameters of biosensors is their sensitivity. Due to the fact that TSM sensors have maximum sensitivity at the center of the sensing electrode, there has been increased research efforts focused on the development of techniques for controlling the distribution of the measurand over the sensor surface. This paper discusses the improvement of TSM sensor performance via the construction of a simple, inexpensive, Sensor-Actuator Hybrid Structure (SANS). The SAHS consists of a piezoelectric ceramic radial mode, ring-shaped, actuator affixed to a TSM AT-cut quartz sensor. The ring actuator operating at a given frequency generates a specific force-pattern over the TSM sensor surface. A Finite Element Analysis (FEA) is used to simulate various force patterns, identify the appropriate ones and determine the corresponding driving frequencies of the ring actuator. The simulation results show that the SAHS is capable of concentrating micron and sub-micron sized particles to high sensitivity locations at and around the center of the sensor. A structure incorporating a ring-actuator (6.35 x 2.4 x 1 mm) with a TSM sensor, operated at 100 MHz, has been experimentally tested with micrometer sized inorganic particles, namely, polystyrene and silica, and biological bacterial spores, Escherichia Coli. The response of the sensor, to particle loading, has been improved by means of manipulation and clustering of particles. Furthermore, particle distribution over the SANS was recorded and was consistent with the FEA simulation results.
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Details
- Title
- Improved Sensitivity of TSM Sensors using a Composite Sensor-Actuator Hybrid Structure (SAHS)
- Creators
- Johann desa - Drexel UniversityQiliang Zhang - Drexel UniversityErtan Ergezen - Drexel UniversityRyszard Lec - Drexel UniversityIEEE
- Publication Details
- 2008 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM, VOLS 1 AND 2, pp 44-49
- Conference
- 2008 IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM
- Publisher
- IEEE
- Number of pages
- 6
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000261285400008
- Scopus ID
- 2-s2.0-55749115590
- Other Identifier
- 991019168415804721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Automation & Control Systems
- Engineering, Electrical & Electronic