Abstract
This review concerns recent methodological advances of square-wave voltammetry as one of the most sophisticatedmembers of the pulse voltammetric techniques. Besides addressing recent theoretical works and representatives ofadvanced analytical studies, an emphasis is given to a few novel methodological concepts such as kinetic analysis atconstant scan rate, cyclic square-wave voltammetry, multisampling square-wave voltammetry, and electrochemical faradaicspectroscopy. For the purpose of improving analytical performances of the technique two new methods are proposedfor the first time.
Highlights
Square-wave voltammetry (SWV) is a wellknown and versatile voltammetric technique for analytical application, mechanistic studies and kinetic measurements of electrode processes [1,2,3]. It is a member of the large family of pulse voltammetric techniques, and it can be considered as a special form of the popular differential pulse voltammetry [4]
In the contemporary SWV, the potential modulation comprises of a staircase potential combined with square-shaped potential pulses (Figure 1A), which was first introduced by Ramaley and Krause [38, 39]
In the mechanistically oriented study, where SWV was used as an electroanalytical tool for detection of a redox label, they have found a complex interplay between the position of the redox label, variations in strand displacement kinetics, and alterations in the melting temperature of DNA duplexes tethered on the gold surface
Summary
Square-wave voltammetry (SWV) is a wellknown and versatile voltammetric technique for analytical application, mechanistic studies and kinetic measurements of electrode processes [1,2,3]. An important feature of the SW voltammetric response is that both forward and backward components are plotted versus the potential of the staircase modulation, i.e. the mid potential of the two adjoining pulses (cf Figure 1B). For these reasons two current values are assigned to each potential value of the staircase modulation. For the purpose of improving analytical performances of the technique two new methodological concepts are elaborate briefly for the first time
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