Kulim Kht for functional nanoparticle deposition

Voltammetric sensors based on LB films

The use of quick, reliable and cheap sensors for the detection of chemical compounds represents an important need in the food industry. Antioxidants, in particular phenols, are among the analytes that must be monitored and measured in order to guarantee the quality of final products. Previous works have demonstrated that voltammetric electrodes chemically modified with electrocatalytic materials can be successfully used as sensors for the detection of antioxidants. Electrodes can be prepared using a variety of techniques from simple Carbon Paste Electrodes (CPE) or Screen printed Electrodes (SPE) to extremely sophisticated nanostructured sensors prepared using the Langmuir-Blodgett (LB) or the electrostatic Layer-by-Layer (LbL) techniques. Nanostructured sensors have the advantage of the enhanced number of active sites producing an increase in the intensity. In this webinar we will get introduced to the field of voltammetric sensors based on LB films and especially LB films with functionalized nanoparticles. The excellent sensing properties of these sensors could be attributed to the electrocatalytic properties of the nanoparticles combined with the high surface to volume ratio and homogeneity provided by the LB technique used for the immobilization. Moreover, the LB technique also provided an accurate method to immobilize the gold nanoparticles giving rise to stable and reproducible sensors. Read more