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학술지 Disordered-nanoparticle?based Etalon for Ultrafast Humidity-responsive Colorimetric Sensors and Anti-counterfeiting Displays
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저자
정충환, 김수정, 장재혁, 고주환, 김도아, 고병수, 송영민, 홍성훈, 노준석
발행일
202203
출처
Science Advances, v.8 no.10, pp.1-8
ISSN
2375-2548
출판사
American Association for the Advancement of Science
DOI
https://dx.doi.org/10.1126/sciadv.abm8598
초록
The development of real-time and sensitive humidity sensors is in great demand from smart home automation and modern public health. We hereby proposed an ultrafast and full-color colorimetric humidity sensor that consists of chitosan hydrogel sandwiched by a disordered metal nanoparticle layer and reflecting substrate. This hydrogel-based resonator changes its resonant frequency to external humidity conditions because the chitosan hydrogels are swollen under wet state and contracted under dry state. The response time of the sensor is ~104 faster than that of the conventional Fabry-P챕rot design. The origins of fast gas permeation are membrane pores created by gaps between the metal nanoparticles. Such instantaneous and tunable response of a new hydrogel resonator is then exploited for colorimetric sensors, anti-counterfeiting applications, and high-resolution displays.
KSP 제안 키워드
Gas permeation, High-resolution displays, Humidity Sensor, Nanoparticle layer, Real-Time, Resonant frequency(Fr), Smart Home Automation, Smart Homes(SH), anti-counterfeiting, chitosan hydrogel, colorimetric sensors
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