期刊
NANO LETTERS
卷 18, 期 7, 页码 4570-4575出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b01825
关键词
Wireless sensor; food spoilage; polyaniline; nanostrucutured polymer; gas sensors
类别
资金
- National Key Research and Development program of China [2017YFA0206302]
- National Natural Science Foundation of China [61674078, 61229401, 41401257, 1157436]
- PAPD
- Alfred P. Sloan Research Fellowship
- Camille Dreyfus Teacher-Scholar Award
Near-field communication (NFC) labeling technology has been recently used to endow smartphones with nonline-of-sight sensing functions to improve the environment, human health, and quality of life. For applications in detecting food spoilage, the development of a sensor with high enough sensitivity to act as a switch for an NFC tag remains a challenge. In this Letter, we developed a nanostructured conductive polymer-based gas sensor with high sensitivity of Delta R/R-0 = 225% toward 5 ppm ammonia NH3 and unprecedented sensitivities of 46% and 17% toward 5 ppm putrescine and cadaverine, respectively. The gas sensor plays a critical role as a sensitive switch in the circuit of the NFC tag and enables a smartphone to readout meat spoilage when the concentration of biogenic amines is over a preset threshold. We envision the broad potential use of such intelligent sensing for food status monitoring applications in daily life, storage and supply chains.
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