Dynamic separation of mobile species transfer processes at polymer modified electrodes using the electrochemical quartz crystal microbalance

Galvanostatically controlled electrochemical quartz crystal microbalance measurements on poly(vinylferrocene) modified electrodes demonstrate temporal separation of mobile species transfers. This approach may provide selectivity in analytical applications involving target species preconcentration in a surface-immobilized film. Dynamic separation of ion, salt and neutral molecule (e.g., solvent) transfer processes is optimized via the appliced current. Mechanistic issues relating to mobile species transfers and polymer relaxation processes are rationalized in terms of a generalized multi-dimensional version of the scheme-of-squares.