CLAYS AS ARCHITECTURAL UNITS AT MODIFIED-ELECTRODES

Since Ghosh and Bard [80] first established the field of clay-modified electrodes some 15 years ago, great strides have been made in underst anding the nature of the clay structural units and their impact on tra nsport of a variety of electroactive probes (anions, neutrals, small c ations, large cations, and compounds with distributed charge). Great s trides have also been made in understanding the nature of the layered material in creating access of interlayer sites (size, charge, iron co ntent, pillaring, and organic tailoring). In the last five years sever al successful applications of clay-modified electrodes have been achie ved. Given the explosive growth in tailoring and construction of novel clay structures it seems reasonable to predict further significant ad vances in applications involving clay-modified electrodes.