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Electrical processes, image formation

Figure 14.12 Process to form hierarchical bilayer structure, (a) Polymer bilayer of PMMA and PS. The polymer-air surface is first destabilized by an electric field generated between the two Si electrodes. The initial instability results in the formation of columns spanning from the surface of the lower layer to the top electrode, (b) During the column formation process, the bottom polymer layer is deformed at the polymer-polymer-air contact line, (c) In the second instability, the deformation of the lower layer is enhanced by the electric field. The polymer moves upward, surrounding the columns and finally leading to form a mantle-like structure. (Images taken from Ref. 65.)... Figure 14.12 Process to form hierarchical bilayer structure, (a) Polymer bilayer of PMMA and PS. The polymer-air surface is first destabilized by an electric field generated between the two Si electrodes. The initial instability results in the formation of columns spanning from the surface of the lower layer to the top electrode, (b) During the column formation process, the bottom polymer layer is deformed at the polymer-polymer-air contact line, (c) In the second instability, the deformation of the lower layer is enhanced by the electric field. The polymer moves upward, surrounding the columns and finally leading to form a mantle-like structure. (Images taken from Ref. 65.)...
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