| Popis: |
In this study, coatings with irregular nanotopography prepared by electrophoretic deposition (EPD) in electro-polished surfaces are characterized. Films are composed by Yttria Stabilized Zirconia (YSZ) particles, 5-8 nm in size and spherical morphology, synthesized under hydrothermal conditions and re-dispersed in the post reaction medium. Growth behaviour of coatings with time, including array morphology, aggregation origin and activity, are explored by means of atomic force microscopy (AFM) and its different measurement modes. Arrangement of electrically driven particles at the nanoscale can be assessed through the topographic description of films prepared with increasing deposition times. Moreover, topography can be associated to the electrokinetic behaviour of particles and agglomeration degree of the suspension. The evaluation of particle junctions and then the quality of particle cohesion within the film can also be discerned by AFM characterization. |
