Graphene electrochemical responses sense surroundings

Graphite oxide (GO) paper, obtained by direct filtration of exfoliated GO in water over PTFE membrane filters, was reduced by using hydrazine vapours. The graphene-paper thus obtained was characterized by the combination of different techniques. The electrochemical characterization by cyclic voltammetry, chronoamperometry and chronopotentiometry presents a strong influence of the working conditions: temperature, electrolyte concentration and current on the electrochemical responses, indicating a good ability of the material to sense ambient and working conditions. Electrochemical devices based on graphene are expected to work as dual, and simultaneous, sensing-actuators.

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► Graphene-paper was obtained from graphite oxide after reduction.
► Graphene-paper was physically and electrochemically characterized.
► Sensing properties were found as in the case of conducting polymers.
► Electrochemical devices based on graphene are expected to work as sensing-actuators.