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ELECTROCHEMICAL AND OPTICAL BIMODAL SENSING OF CAFFEIC ACID BASED ON ELECTRODES OF NANORODS AuNPs: PEDOT: PSS AND BIOHYBRID CHITOSAN: PEDOT: PSS

Abstract

Caffeic acid (CA) is one of the electro-active phenolic compounds. Electrochemical sensor and optical sensors composed of PEDOT ((poly 3,4-ethylenedioxy thiophene)): PSS, CHITOSAN: PEDOT: PSS and nano rods of AuNPs: PEDOT: PSS electrodes were developed by drop casting method on ITO (Indium tin oxide) for the determination of CA in aqueous solutions. The developed interactions between the analyte and prepared electrodes were also analyzed by XPS studies. The prepared electrodes were characterized by various spectroscopic techniques namely UV-Visible, FT-IR, XRD and the surface morphology was investigated by SEM and TEM. The quatitative detection of CA was done via electrochemical technique namely cyclic voltammetry (CV) and optical technique using UV-Visible spectroscopy. The cyclic voltammograms were recorded at the optimized parameters. CV allowed the detection of the analyte over a wide linear concentration range varied from 2 μ mol / dm3 to 10 m mol /dm3. The sensing parameters including values of limit of detection (LOD), limit of quantification (LOQ) and sensitivity of each electrode were determined through the plotted concentration calibration curves of CA for each technique. The acceptable values of recovery implied its feasibility for practical application

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Supplementary files

Publication details

The article was received on 04 May 2017, accepted on 13 Jul 2017 and first published on 14 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ01505D
Citation: New J. Chem., 2017, Accepted Manuscript
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    ELECTROCHEMICAL AND OPTICAL BIMODAL SENSING OF CAFFEIC ACID BASED ON ELECTRODES OF NANORODS AuNPs: PEDOT: PSS AND BIOHYBRID CHITOSAN: PEDOT: PSS

    S. Khan and A. K. Narula, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ01505D

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