Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 22, Pages 6554-6557Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201501434
Keywords
amines; cobalt; carbon nanotubes; porphyrinoids; sensors
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Funding
- National Science Foundation [DMR-1410718, 1122374]
- Army Research Office through the Institute for Soldier Nanotechnologies
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1410718] Funding Source: National Science Foundation
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Chemiresistive detectors for amine vapors were made from single-walled carbon nanotubes by noncovalent modification with cobalt meso-arylporphyrin complexes. We show that through changes in the oxidation state of the metal, the electron-withdrawing character of the porphyrinato ligand, and the counteranion, the magnitude of the chemiresistive response to ammonia could be improved. The devices exhibited sub-ppm sensitivity and high selectivity toward amines as well as good stability to air, moisture, and time. The application of these chemiresistors in the detection of various biogenic amines (i.e. putrescine, cadaverine) and in the monitoring of spoilage in raw meat and fish samples (chicken, pork, salmon, cod) over several days was also demonstrated.
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