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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
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Sensors and Materials, Volume 32, Number 3(3) (2020)
Copyright(C) MYU K.K.
pp. 1101-1109
S&M2163 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2020.2738
Published: March 31, 2020

Development of Formaldehyde Gas Sensor that Exhibits Distinct Color Changes [PDF]

Yasumasa Kanekiyo, You Mitani, Miho Suda, Hiroshi Aoki, and Hironobu Minai

(Received December 15, 2019; Accepted February 21, 2020)

Keywords: formaldehyde, sensor, colorimetric, film, dye

A new type of colorimetric sensor that detects formaldehyde in air was developed. The sensor consists of a thin film containing primary amino groups on a glass substrate. After exposure to gaseous formaldehyde, the thin film was immersed in an aqueous solution containing an anionic dye. The color of the thin film distinctly changed in accordance with the formaldehyde concentration in air. It was found that the sensitivity of this sensor is significantly affected by factors such as the exposure time, the humidity of air, and the monomer composition of the thin film.

Corresponding author: Yasumasa Kanekiyo


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Cite this article
Yasumasa Kanekiyo, You Mitani, Miho Suda, Hiroshi Aoki, and Hironobu Minai, Development of Formaldehyde Gas Sensor that Exhibits Distinct Color Changes, Sens. Mater., Vol. 32, No. 3, 2020, p. 1101-1109.



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