Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 145, Issue 1, Pages 527-532Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.12.070
Keywords
Boron doped diamond; Gas sensors
Funding
- National Science Foundation through NIRT [ECS 0404137]
- National Science Foundation through IGERT [0221681]
- National Science Foundation through GK12 [0638709]
- GMS University of South Florida [GFMMD00]
- Direct For Education and Human Resources
- Division Of Graduate Education [0221681] Funding Source: National Science Foundation
- Division Of Graduate Education
- Direct For Education and Human Resources [0638709] Funding Source: National Science Foundation
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We report room temperature detection of carbon monoxide (CO) below 100 parts per million in air using boron doped diamond films prepared by hot filament chemical vapor deposition method. Gas sensing characteristics are observed to be improved with larger grain size in the films. Sensing characteristics for 100 ppm CO with response time of 30 s and recovery times of similar to 50 s at room temperature show the excellence of boron doped diamond as CO sensor material. The lowest values of response time similar to 5 s and recovery time similar to 20 s were observed for BDD with grain size of 1 mu m for 1000 ppm of CO in air. The carbon monoxide sensing mechanism is attributed to electron donation to p-type boron doped diamond as a result of CO oxidation on its surface. (C) 2010 Elsevier B.V. All rights reserved.
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