A bio-inspired sensor based on surfactant film and Pd nanoparticles

作者：Zapp Eduardo; Souza Franciane D; Souza Bruno S; Nome Faruk; Neves Ademir; Vieira Iolanda C^*

来源：Analyst, 2013, 138(2): 509-517.

DOI：10.1039/c2an36264c

A bio-inspired complex, [(bpbpmp)Fe-III(m-OAc)(2)Cu-II](ClO4), was combined with a zwitterionic surfactant (ImS3-14) stabilizing pre-formed palladium nanoparticles and coated on a glassy carbon electrode (GCE). This bio-inspired surfactant film was capable of catalyzing redox reactions of dihydroxybenzenes, thus allowing the simultaneous electrochemical quantification of CC and HQ in cigarette residue samples by square-wave voltammetry (SWV). The best experimental conditions were obtained using phosphate buffer solution (0.1 mol L-1, pH 7.0), with 1.3 nmol of the bio-inspired complex, 0.15 mu mol of the surfactant and 1.08 nmol of Pd. The best voltammetric parameters were: frequency 100 Hz, pulse amplitude 40 mV and step potential 8 mV. The limits of detection calculated from simultaneous curves were found to be 2.2 x 10(-7) and 2.1 x 10(-7) mol L-1 for HQ and CC respectively.

• 出版日期2013