期刊
ACS SENSORS
卷 4, 期 10, 页码 2571-2587出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.9b01114
关键词
organic thin-film transistor; artificial receptor; extended-gate electrode; molecular recognition; self-assembled monolayer; chemical sensor; host-guest chemistry; supramolecular chemistry
资金
- Japan Society for the Promotion of Science (JSPS) [17H04882, 17K14489, 18J21190]
- Research Fellowship for Young Scientists (DC1) of JSPS
- Grants-in-Aid for Scientific Research [18J21190, 17K14489] Funding Source: KAKEN
Organic thin-film transistors (OTFTs) have attracted intense attention as promising electronic devices owing to their various applications such as rollable active matrix displays, flexible nonvolatile memories, and radio frequency identification (RFID) tags. To further broaden the scope of the application of OTFTs, we focus on the host guest chemistry combined with the electronic devices. Extended-gate types of OTFTs functionalized with artificial receptors were fabricated to achieve chemical sensing of targets in complete aqueous media. Organic and inorganic ions (cations and anions), neutral molecules, and proteins, which are regarded as target analytes in the field of host-guest chemistry, were electrically detected by artificial receptors. Molecular recognition phenomena on the extended-gate electrode were evaluated by several analytical methods such as photoemission yield spectroscopy in the air, contact angle goniometry, and X-ray photoelectron spectroscopy. Interestingly, the electrical responses of the OTFTs were highly sensitive to the chemical structures of the guests. Thus, the OTFTs will facilitate the selective sensing of target analytes and the understanding of chemical conversions in biological and environmental systems. Furthermore, such cross-reactive responses observed in our studies will provide some important insights into next-generation sensing systems such as OTFT arrays. We strongly believe that our approach will enable the development of new intriguing sensor platforms in the field of host-guest chemistry, analytical chemistry, and organic electronics.
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