Cover picture provided by Dr. Elena Benito-Peña and Dr. Susana Campuzano. Electroanalysis covers all branches of electroanalytical chemistry, including both fundamental and application papers as well as reviews dealing with analytical voltammetry, potentiometry, new electrochemical sensors and detection schemes, nanoscale electrochemistry, advanced electromaterials, nanobioelectronics, point-of-care diagnostics, wearable sensors, and practical applications.

Schematic illustration of the construction of a AuNPs/Cu/C/GCE.

Pt/C synthesized without surfactants showed minimal particle aggregation, while citrate-containing catalysts exhibited significant Pt particle growth. These results highlight the critical role of surfactants in nanoparticle aggregation and catalyst durability under nonaqueous conditions.

A paper-based microfluidic device to sample solutions continuously at a constant flow for a long time was fabricated. The device featured a fan-shaped paper structure. The flow rate was effectively elongated and adjusted by impregnating the entire paper area with poly(2-hydroxyethyl methacrylate).

With the developed biosensor, the current differences obtained regarding the reaction of phenylalanine hydroxylase enzyme with different concentrations of phenylalanine in the presence of biopterin were determined voltammetrically by the differential pulse method and phenylalanine determination was made in unknown samples with the help of the standard graph drawn between the current difference obtained and the concentration.