Journal
ORGANIC ELECTRONICS
Volume 11, Issue 5, Pages 895-898Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2010.02.007
Keywords
Gas sensor; Self-assembled monolayer field-effect transistor; Nitric oxide; Porphyrin
Funding
- Zernike Institute for Advanced Materials
- Dutch Organization for Scientific Research (NWO)
- EC [212311]
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A new sensitive gas sensor based on a self-assembled monolayer field-effect transistor (SAMFET) was used to detect the biomarker nitric oxide. A SAMFET based sensor is highly sensitive because the analyte and the active channel are separated by only one monolayer. SAMFETs were functionalised for direct NO detection using iron porphyrin as a specific receptor. Upon exposure to NO a threshold voltage shift towards positive gate biases was observed. The sensor response was examined as a function of NO concentration. High sensitivity has been demonstrated by detection of ppb concentrations of NO. Preliminary measurements have been performed to determine the selectivity. (c) 2010 Elsevier B.V. All rights reserved.
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