Abstract
The influence of electrode roughness on formation of metallic nanostructures made via block copolymer nanotemplates was studied. Metallic nanostructures fabricated on electrodes with various roughnesses were prepared by sputtering the metals onto polystyrene-block-poly(4-vinylpyridine) nanotemplates. Their structure was characterized by atomic force microscopy and x-ray reflectivity. If the electrode roughness exceeds a critical value of about 1nm per 1×1μm2, an adhesion insulating thin film is formed between the electrode (substrate) and block copolymer nanotemplate. This insulating film strongly influences electrical contact with the substrate electrode. Steady-state current-voltage characteristics were studied for various configurations of the electrodes. They were analyzed and discussed in the frame of several injection and transport mechanism models.
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