Journal
ELECTROANALYSIS
Volume 23, Issue 4, Pages 885-893Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201000522
Keywords
Graphene; Porphyrin; Electrochemical sensors; Explosive detection; Nitroaromatic compounds
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Funding
- Science and Technology Directorate of the U.S. Department of Homeland Security
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Porphyrin functionalized graphene is used to electrochemically detect nitroaromatic explosives. It is found that synergistic effects from the specific good adsorptive properties of porphyrin and the large electroactive surface area and fast charge transfer of graphene contribute to the sensitive detection. The porphyrin/graphene sensor shows an ultratrace detection of as low as 1 ppb of 2,4-dinitrotoluene, 0.5 ppb of 2,4,6-trinitrotoluene, 1 ppb of 1,3,5-trinitrobenzene and 2 ppb of 1,3-dinitrobenzene respectively and good reproducibility within 5.1% standard deviation for a series of 9 repetitive measurements. The porphyrin/graphene sensor provides a unique platform in the analysis of nitroaromatic explosives for various security and environmental applications.
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