The objective of this research is to develop a transducer for
recognition of molecular changes in the presence of chemical
vapors. This transducer is tested using polymer sensing layers
known to be sensitive to ethanol vapors. A surface acoustic wave
device is selected as the transducer element due to low cost, high
surface sensitivity, and sensitivity. These devices are designed
and fabricated in-house, and a polymer sensing layer applied. The
frequency response of the coated device is probed both with and
without the presence of airborne ethanol molecules in a vapor
stream. By analyzing the changes in the amplitude and phase of the
frequency response near resonance, vapor detection was conclusively
demonstrated. Additionally, the mechanism of change was identified,
allowing future work in optimizing the sensitivity of the device.
Other future work will include application of a biomolecular
sensing layer, design of circuitry for a portable devices, and
fabrication of a MEMS preconcentrator. The final goal of the
project is a portable sensor array using surface acoustic wave
devices coated with different bio-molecules.
General
Imprint: |
Biblioscholar
|
Country of origin: |
United States |
Release date: |
November 2012 |
First published: |
November 2012 |
Authors: |
Daniel M. Gallagher
|
Dimensions: |
246 x 189 x 9mm (L x W x T) |
Format: |
Paperback - Trade
|
Pages: |
164 |
ISBN-13: |
978-1-288-31345-7 |
Categories: |
Books >
Social sciences >
Education >
General
|
LSN: |
1-288-31345-4 |
Barcode: |
9781288313457 |
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