TY - JOUR
T1 - Detection of molecular adsorbate in aqueous solution based on electroosmosis
AU - Naito, Toyohiro
AU - Inoue, Hiroki
AU - Futagami, Shunta
AU - Kunisawa, Akihiro
AU - Kubo, Takuya
AU - Otsuka, Koji
N1 - Funding Information:
This work was partly supported by the Micro/Nano Fabrication Hub in Kyoto University founded by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. We would also like to express our gratitude to the Asahi Glass Foundation, Shimadzu Foundation, and the Murata Science Foundation for their financial support.
Publisher Copyright:
© MYU K.K.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
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U2 - 10.18494/SAM.2019.2042
DO - 10.18494/SAM.2019.2042
M3 - Article
AN - SCOPUS:85060979922
VL - 31
SP - 45
EP - 52
JO - Sensors and Materials
JF - Sensors and Materials
SN - 0914-4935
IS - 1
ER -