Directed assembly of multilayers: the case of Prussian Blue MillwardRoy C. MaddenClaire E. SutherlandIan MortimerRoger J. FletcherStephen MarkenFrank 2013 We introduce the concept of ‘directed assembly’ of multilayers on surfaces: the overall process involves the exposure of a surface to a series of solutions containing, alternately, adsorbable cations and adsorbable anions, and these are gradually built up into well-defined multilayer structures.