Advanced Electrochemical Methods in Molecular Detection

Dear Colleagues,

Electrochemical techniques have been extensively employed in the electroanalysis of organic and inorganic compounds. They are precise, exact, sensitive, low-cost and require short analysis times. The success of these techniques mainly results from innovations in electrochemical instrumentation, which arose from the development of modern electronic components that enable the use of techniques that involve potential pulses. Techniques such as square wave voltammetry, differential pulse voltammetry and amperometry lead to results with high sensitivity, enabling analyses of water, soil, food and even compounds of biological interest in blood, plasma and urine samples. Furthermore, potentiostats/galvanostats make “in loco” analyses possible. When optimizing an electroanalytical method to determine a particular molecule, it is necessary to consider not only the electrochemical technique but also the materials used in the working electrode. The combination of specially designed sensing interfaces with electrochemical techniques has great potential in enabling more sensitive and selective analytical detection of molecules. In this sense, the advances in biosensors and chemically modified electrodes have increasingly contributed to the development of novel electroanalytical methods. Biosensors based on enzymes, antibodies, aptamers and microbes have been widely used in the development of electroanalytical methods with highly improved performance. For sensor modification, a wide variety of materials can be used, including carbon-based nanomaterials such as carbon nanotubes, black carbon and graphene; chemically imprinted polymers; metallic nanoparticles; hybrid materials; metallic quantum dots; carbon quantum dots; magnetic particles; and metal–organic frameworks.

Given the importance of this topic in electroanalysis, this Special Issue aims to collect original research articles, reviews and technical notes on new advanced electroanalytical methodologies for the determination of organic and inorganic molecules in different samples using different electrochemical sensors. We also welcome papers on the use of new methodologies based on biosensors; chemically modified electrodes; bare electrodes with outstanding performance, such as boron-doped diamond electrodes; and miniaturized, microfluidic and flow systems.

Prof. Dr. Roberta Antigo Medeiros
Prof. Dr. César Ricardo Teixeira Tarley
Guest Editors

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