Wireless Oxygen Sensors Enabled by Fe(II)-Polymer Wrapped Carbon Nanotubes
| Autor: | Timothy M. Swager, Desroches Maude, Rong Zhu, Bora Yoon |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
chemistry.chemical_element Bioengineering Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Signal Oxygen law.invention law Wireless OXYGEN EXPOSURE Instrumentation Fluid Flow and Transfer Processes chemistry.chemical_classification business.industry Process Chemistry and Technology Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Modified atmosphere 0210 nano-technology business Oxygen sensor |
| Zdroj: | ACS sensors. 2(7) |
| ISSN: | 2379-3694 |
| Popis: | Oxygen causes food spoilage and drug degradation, which is addressed commercially by modified atmosphere packaging. We report herein a wireless oxygen sensor, O2-p-CARD, from solution processed FeII-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 O2-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 O2-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. |
| Databáze: | OpenAIRE |
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