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Journal Article
Disordered-nanoparticle?based Etalon for Ultrafast Humidity-responsive Colorimetric Sensors and Anti-counterfeiting Displays
- Authors
- Chunghwan Jung, Soo-Jung Kim, Jaehyuck Jang, Joo Hwan Ko, Doa Kim, Byoungsu Ko, Young Min Song, Sung-Hoon Hong, Junsuk Rho
- Issue Date
- 2022-03
- Citation
- Science Advances, v.8, no.10, pp.1-8
- ISSN
- 2375-2548
- Publisher
- American Association for the Advancement of Science
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- 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
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC)
(CC BY NC)
