Electrochemical (EC) SPR allows seamless integration of SPR with electrochemical measurements.

When combined with voltammetric techniques, SPR measures changes in the physical properties of an electrode surface or molecules adsorbed on the electrode. In EC-SPR, the thin metal film not only serves to excite surface plasmons, but also acts as a working electrode for electrochemical detection.

Electrochemical SPR not only produces standard CV curves (Figure 2a), but also yields information about the SPR signal change in response to oxidation and reduction processes (Figure 2b).