Integration of smart nanomaterials for highly selective disposable sensors and their forensic applications in amphetamine determination

Freestanding Films of Reduced Graphene Oxide Fully Decorated with Prussian Blue Nanoparticles for Hydrogen Peroxide Sensing

“…Many features are required from the materials used in wearable sensors, but flexibility and (electrical or thermal) conductivity are often essential ones. Graphene-based composites have been extensively explored for this purpose owing to the outstanding properties of graphene (e.g., tunable conductivity, high surface area, and controllable thickness) to prepare composites with different classes of compounds aiming for further application in sensor devices, such as nanoparticles or molecularly imprinted polymers. − In addition, graphene-based composites may be processed as paper-like electrodes, , thin and freestanding materials that can work as a current collector and chemical detector. Such paper-like graphene-based electrodes are easily fabricated through different techniques, ranging from vacuum filtration [in which graphene-based films are assembled onto a membrane surface during the vacuum drying process of graphene oxide (GO) or reduced graphene oxide (rGO) dispersion] to evaporation, electrochemical methods, electrospraying, or roll-to-roll processing .…”