期刊
ACS SENSORS
卷 2, 期 7, 页码 1044-1050出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.7b00327
关键词
carbon nanotubes; wireless sensing; radio frequency identification; oxygen sensing; dosimeter
资金
- Chemical and Biological Technologies Department at the Defense Threat Reduction Agency (DTRA-CB) [BA12PHM123]
- Army Research Office through the MIT Institute for Soldier Nanotechnology
Oxygen causes food spoilage and drug degradation, which is addressed commercially by modified atmosphere packaging. We report herein a wireless oxygen sensor, O-2-p-CARD, from solution processed Fell-poly(4-vinylpyridine)-single-walled carbon nanotube composites on commercial passive near-field communication tags. A large irreversible attenuation in the reflection signal of an O(2)p-CARD was observed in response to oxygen at relevant concentrations, enabling non-line-of-sight monitoring of modified atmosphere packaging. These devices allow for cumulative oxygen exposure inside a package to be read with a conventional smartphone. We have demonstrated that an O(2)p-CARD can detect air ingress into a nitrogen-filled vegetable package at ambient conditions. This technology provides an inexpensive, heavy-metal-free, and smartphone-readable method for in situ non-line-of-sight quality monitoring of oxygen-sensitive packaged products.
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