Logo UHasselt

menu

IMO - IMOMEC


Services

IMO - IMOMEC

Logo UHasselt Universiteit Hasselt - Knowledge in action

CYCLIC VOLTAMETRY

 

Cyclic voltammetry is a very versatile electrochemical technique which allows probing of the mechanics of redox reactions and transport properties of a system in solution. This is accomplished with a three electrode arrangement whereby the potential relative to a reference electrode (Ag/AgCl) is scanned at a working electrode while the resulting current flowing through a counter (or auxiliary) electrode is monitored in a quiescent solution. During a scan the voltage is swept in a certain range and the resulting current is measured. This current is caused by reduction and oxidation events of certain molecules (i.e. K3Fe(CN)6, Fe3+/4+,…) at the interface of the working electrode and the electrolyte. When well defined redox mediators are used, they can be used to characterize the conductivity/reactivity properties of materials (i.e. polymer films used in solar cells) or be part of detection technique in biosensing. The in house Cyclic voltammetry setup is a IVIUM STAT Device capable of measuring cyclic- and linear sweeps. The applicable scan rates vary between 1µV/s and  10 V/s with a standard scan range of ± 10V with 0.3mV step resolution.  Also high definition scan ranges can be measured at ±100mV, with 3µV step resolution.