Polymer brush modified electrode with switchable selectivity triggered by pH changes enhanced by gold nanoparticles

Author(s)

Juliane R. Sempionatto ^[1] ; Lucas C. Recco ^[1] ; Valber A. Pedrosa ^[1]

Affiliation

^[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Quim & Bioquim, BR-18618970 Botucatu, SP - Brazil

• Document type: Journal article
• Source: Journal of the Brazilian Chemical Society; v. 25, n. 3, p. 453-459, 2014-03-00.

Abstract

In this work, a sensor was built up with smart material based on polymer brush and gold nanoparticles. The modified electrode functionalized with polyacrylic acid (PAA) tethered to indium tin oxide (ITO) and covered with gold nanoparticle (ITO/PAA/Au) demonstrated switchable interfacial properties discriminating different pHs. The switchable electrochemical and plasmonic process was characterized by cyclic voltammetry (CV), electrochemistry impedance spectroscopy (EIS), and localized surface plasmon resonance (LSPR). (AU)

• FAPESP's process: 10/07478-5 - Chain reaction amplified biocatalytic responses in nanostructured plasmonic sensors
• Grantee: Valber de Albuquerque Pedrosa
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 13/12623-2 - Study of stimulus-responsive properties of polymer brush modified with gold nanoparticle
• Grantee: Juliane Renata Sempionatto Moreto
• Support Opportunities: Scholarships in Brazil - Master