Journal
NANO LETTERS
Volume 13, Issue 2, Pages 798-802Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl304598p
Keywords
Molecular sensing; explosives detection; catalysis
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Funding
- DTRA [HDTRA1-10-0047]
- McMinn Endowment at Vanderbilt University
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New sensing techniques for detecting molecules, especially self-cleaning sensors, are in demand. Here we describe a room-temperature process in which a nanostructured substrate catalyzes the reaction of a target molecule with atmospheric oxygen and the reaction energy is absorbed by the substrate, where it can in principle be detected. Specifically, we report first-principles calculations describing a reaction between 2,4-dinitrotoluene (DNT) and atmospheric O-2 catalyzed by Fe-porphyrin at room temperature, incorporating an oxygen into the methyl group of DNT and releasing 1.9 eV per reaction. The atomic oxygen left on the Fe site can be removed by reacting with another DNT molecule, restoring the Fe catalyst.
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