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Articles • J. Braz. Chem. Soc. 25 (3) • Mar 2014 • https://doi.org/10.5935/0103-5053.20130298 linkcopy

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

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    Abstracts

    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).

    polyacrylic acid (PAA); LSPR; polymer brush

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    Sociedade Brasileira de Química Instituto de Química - UNICAMP, Caixa Postal 6154, 13083-970 Campinas SP - Brazil, Tel./FAX.: +55 19 3521-3151 - São Paulo - SP - Brazil
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