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Sensors and Materials
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Sensors and Materials, Volume 31, Number 1(1) (2019)
Copyright(C) MYU K.K.
S&M1746 Research Paper of Special Issue
Published: January 15, 2019
Detection of Molecular Adsorbate in Aqueous Solution Based on Electroosmosis [PDF]
Toyohiro Naito, Hiroki Inoue, Shunta Futagami, Akihiro Kunisawa, Takuya Kubo, and Koji Otsuka
(Received June 30, 2018; Accepted August 24, 2018)
Keywords: microfluidic device, electroosmotic flow, chemical sensor
We present a novel chemical sensor based on electroosmotic flow (EOF) for the simple detection of chemical adsorption in an aqueous solution. Fundamental investigations for the optimization of a microfabricated electroosmotic pump (EOP) revealed the relationship between the applied electric condition and pumping performance of EOPs. The optimized EOP had an improved minimum driving voltage of only 9 V, which could be driven with a portable battery. The EOP after surface modification by molecular imprinting, such as a method with ionic complexes, changed the pumping performance by the adsorption of chemicals on its surface. We also investigated the relationship between the change in pumping rate and the chemical species of adsorbate using quaternary ammonium cations with different alkyl chains. The pump showed a change in pumping performance depending on the length of the alkyl chains.
Corresponding author: Toyohiro Naito
This work is licensed under a Creative Commons Attribution 4.0 International License.
Cite this article
Toyohiro Naito, Hiroki Inoue, Shunta Futagami, Akihiro Kunisawa, Takuya Kubo, and Koji Otsuka, Detection of Molecular Adsorbate in Aqueous Solution Based on Electroosmosis, Sens. Mater., Vol. 31, No. 1, 2019, p. 45-52.
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