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Type: Artigo
Title: Water-gated Phthalocyanine Transistors: Operation And Transduction Of The Peptide-enzyme Interaction
Author: de Oliveira
Rafael Furlan; Merces
Leandro; Vello
Tatiana Parra; Bof Bufon
Carlos Cesar
Abstract: The use of aqueous solutions as the gate medium is an attractive strategy to obtain high charge carrier density (10(12) cm(-2)) and low operational voltages (<1 V) in organic transistors. Additionally, it provides a simple and favorable architecture to couple both ionic and electronic domains in a single device, which is crucial for the development of novel technologies in bioelectronics. Here, we demonstrate the operation of transistors containing copper phthalocyanine (CuPc) thin-films gated with water and discuss the charge dynamics at the CuPc/water interface. Without the need for complex multilayer patterning, or the use of surface treatments, water-gated CuPc transistors exhibited low threshold (100 +/- 20 mV) and working voltages (<1 V) compared to conventional CuPc transistors, along with similar charge carrier mobilities (1.2 +/- 0.2) x 10(-3) cm(2) V-1 s(-1). Several device characteristics such as moderate switching speeds and hysteresis, associated with high capacitances at low frequencies upon bias application (3.4 -12 mu F cm(-2)), indicate the occurrence of interfacial ion doping. Finally, water-gated CuPc OTFTs were employed in the transduction of the biospecific interaction between tripeptide reduced glutathione (GSH) and glutathione S-transferase (GST) enzyme, taking advantage of the device sensitivity and multiparametricity. (C) 2016 Elsevier B.V. All rights reserved.
Subject: Copper Phthalocyanine
Water-gated Organic Transistor
Reduced Glutathione
Glutathione S-transferase
Editor: Elsevier Science BV
Citation: Organic Eletronics. Elsevier Science Bv, v. 31, p. 217 - 226, 2016.
Rights: fechado
Identifier DOI: 10.1016/j.orgel.2016.01.041
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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