Passive Wireless Hydrogen Sensors Using Orthogonal Frequency Coded Acoustic Wave Devices

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,997.00
Award Year:
2006
Program:
STTR
Phase:
Phase I
Contract:
NNK06OM24C
Award Id:
80759
Agency Tracking Number:
050121
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1195 Baltimore-Annapolis Blvd., Unit #2, Arnold, MD, 21012
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
603565883
Principal Investigator:
Jacqueline Hines
Principal Investigator
(410) 991-4345
jhines@ieee.org
Business Contact:
Jacqueline Hines
Business Official
(410) 991-4345
jhines@ieee.org
Research Institution:
University of Central Florida
Andrea Adkins
4000 Central Florida Boulevard
Orlando, FL, 32816
(407) 823-2414
Nonprofit college or university
Abstract
This proposal describes the development of passive surface acoustic wave (SAW) based hydrogen sensors for NASA application to distributed wireless hydrogen leak detection systems. Orthogonal Frequency Coded (OFC) SAW devices have been demonstrated as passive wireless temperature sensors in NASA Contract NNK04OA28C, and are being further developed under NNK05OB31C. The proposed hydrogen sensors will use a novel OFC SAW device structure, combined with Palladium nanocluster film elements to produce fast, reversible, highly sensitive hydrogen sensors capable of detecting a wide range of hydrogen concentrations at room temperature. The proposed research will utilize results from Argonne National Labs on the formation of Pd nanocluster films on self-assembled siloxane monolayers on glass. These optimized nanocluster films demonstrated hydrogen sensing from 25 ppm to over 2% hydrogen, with response times of milliseconds, complete reversibility, and no baseline drift at room temperature. The films experience large conductivity changes due to the hydrogen induced lattice expansion of the Pd nanoclusters and the quantum nature of conduction in nanocluster films. The performance of the SAW device will change in response to a change in conductivity of this film. Issues including SAM formation on piezoelectric substrates, nanocluster film deposition, and simulation of device performance will be evaluated.

* information listed above is at the time of submission.

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