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NANOCLUSTER THIN-FILMS FOR SENSOR APPLICATIONS

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Date Issued:
2015
Abstract/Description:
The ability to sense gas such as methane can provide an early warning system to protect human lives. High demand for the ability to sense the world around us has provided an extensive area of research for sensor technology. In particular, current sensor technology, specifically for methane, has provided sensors that require a heated environment to function. The majority of current methane sensors function at temperatures between 150[degrees]C and 450[degrees]C . This thesis will explore an approach to produce a room temperature methane sensor. This research will investigate techniques to create a sensor that is responsive to methane at 23[degrees]C. The approach will use the integration of a very thin film, which changes its resistive properties when methane gas is applied, deposited atop the surface of a piezoelectric substrate. An aluminum thin film interdigital transducer will launch a surface acoustic wave (SAW) that travels under the sensor's gas-sensitive resistive thin film. The SAW/resistive film interaction changes the SAW amplitude, phase and delay. For this work, three films, tin dioxide (SnO2), zinc oxide (ZnO) and palladium (Pd) [1, 2] will be studied. Gas detection will be shown when combining ZnO and Pd, and, observable change in SAW propagation loss is measured when methane gas is present at the film.
Title: NANOCLUSTER THIN-FILMS FOR SENSOR APPLICATIONS.
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Name(s): Serritella, Joseph, Author
Malocha, Donald, Committee Chair
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2015
Publisher: University of Central Florida
Language(s): English
Abstract/Description: The ability to sense gas such as methane can provide an early warning system to protect human lives. High demand for the ability to sense the world around us has provided an extensive area of research for sensor technology. In particular, current sensor technology, specifically for methane, has provided sensors that require a heated environment to function. The majority of current methane sensors function at temperatures between 150[degrees]C and 450[degrees]C . This thesis will explore an approach to produce a room temperature methane sensor. This research will investigate techniques to create a sensor that is responsive to methane at 23[degrees]C. The approach will use the integration of a very thin film, which changes its resistive properties when methane gas is applied, deposited atop the surface of a piezoelectric substrate. An aluminum thin film interdigital transducer will launch a surface acoustic wave (SAW) that travels under the sensor's gas-sensitive resistive thin film. The SAW/resistive film interaction changes the SAW amplitude, phase and delay. For this work, three films, tin dioxide (SnO2), zinc oxide (ZnO) and palladium (Pd) [1, 2] will be studied. Gas detection will be shown when combining ZnO and Pd, and, observable change in SAW propagation loss is measured when methane gas is present at the film.
Identifier: CFH0004832 (IID), ucf:45481 (fedora)
Note(s): 2015-05-01
B.S.E.E.
Engineering and Computer Science, Dept. of Electrical Engineering and Computer Science
Bachelors
This record was generated from author submitted information.
Subject(s): Thin film devices
Thin Films
Acoustic
SAW
Surface Acoustic Waves
Sensors
Methane
ZnO
Zinc Oxide
Pd
Palladium
SnO2
Tin Dioxide
Methane Sensor
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFH0004832
Restrictions on Access: public
Host Institution: UCF

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