Electrochemical Sensing of Caffeic Acid Using Gold Nanoparticles Embedded in Poly(3,4-ethylenedioxythiophene) Layer by Sinusoidal Voltage Procedure
作者： Davide Bottari , Laura Pigani , Chiara Zanardi , Fabio Terzi , Sanda Victorinne Paţurcă
DOI: 10.3390/CHEMOSENSORS7040065
关键词:
摘要: The increasing demand for sensitive electrochemical sensors in various medical and industrial applications promotes the fabrication of novel sensing materials with improved electrocatalytic analytical performances. This work deals development a composite material based on gold nanoparticles (AuNPs) embedded poly(3,4-ethylenedioxythiophene) (PEDOT) layer determination caffeic acid (CA). CA is phenolic compound excellent antioxidant properties that present vegetables, fruits, alcoholic non-alcoholic beverages. Its quantification great interest food production monitoring healthcare applications. Therefore, devices required. AuNPs have been prepared situ onto PEDOT coated glassy carbon electrode (GC) by means an innovative procedure consisting use sinusoidal voltage (SV) superimposed constant potential. physico-chemical PEDOT-AuNPs were investigated range techniques including cyclic voltammetry, quartz crystal microbalance, scanning electron microscopy. electrode/poly(3,4-ethylenedioxythiophene)-gold nanoparticles-sinusoidal (GC/PEDOT-AuNPs-SV) sensor exhibited good performance toward linear response over wide concentration from 10 µM to 1 mM. In addition, proposed GC/PEDOT-AuNPs-SV was successfully applied total polyphenols content expressed as equivalents juice samples.
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