Chemical-to-Electrical-Signal Transduction Synchronized with Smart Gel Volume Phase Transition.

Matsumoto, Akira; Sato, Naoko; Sakata, Toshiya; Yoshida, Ryo; Kataoka, Kazunori; Miyahara, Yuji · Adv Mater · 2009

basic_science · Level V

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Abstract

A stimulus-responsive polymer gel designed on a field-effect transistor gate undergoes a reversible volume phase transition in response to a specific biomolecule. An abrupt permittivity change at the gel/gate interface during the transition gives rise to a chemical to electrical signal conversion; the signal is thus detectable via a transistor without the limit of the Debye length.