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Demonstration of Molecular Sensing Using QCM Device Coated with Stimuli-sensitive Hydrogel

Published online by Cambridge University Press:  29 November 2012

Yoshimi. Seida ,
Yuri Nakano  and
Yoshio Nakano
Yoshimi. Seida
Affiliation:
Natural Science Laboratory, Toyo University, Tokyo, 112-8606 Japan Interdisciplinary Graduate School of Science and Technology, Tokyo Institute of Technology, Yokohama, 226-8504 Japan
Yuri Nakano
Affiliation:
Interdisciplinary Graduate School of Science and Technology, Tokyo Institute of Technology, Yokohama, 226-8504 Japan
Yoshio Nakano
Affiliation:
Interdisciplinary Graduate School of Science and Technology, Tokyo Institute of Technology, Yokohama, 226-8504 Japan
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Abstract

Molecular sensing using stimuli-responsive viscoelastic property of amphiphilic polymer hydrogel was demonstrated. Thermo-responsive poly(N-isopropylacrylamide); NIPA, hydrogel immobilizing bovine serum albumin (BSA) in its polymer chain was synthesized on the AT-cut QCM (Quartz crystal microbalance). The device was provided to the sensing of anti-BSA antibody. The resonance behavior of QCM in response to the adsorption of anti-BSA antibody on the hydrogel was observed based on both the resonance frequency and resistance of QCM with impedance analysis. The QCM device coated with the LCST polymer hydrogel revealed a characteristic resonance behavior in response to the adsorption of anti-BSA antibody in the collapse phase of gel at which the gel lost most of its hydrated water. The resonance frequency and resistance in the collapsed gel were highly sensitive and their changes in response to the target adsorption were much larger than in the swelling state of gel. The use of the device at the LCST of NIPA gel is ideal because the largest amplification of the adsorption signal is available along with the largest phase change of NIPA gel.

Keywords

adsorptionsensormicrostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1498: Symposium L – Biomimetic, Bio-inspired and Self-Assembled Materials for Engineered Surfaces and Applications , 2013 , pp. 151 - 156
Copyright
Copyright © Materials Research Society 2012 

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References

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