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C-AFM height and current images of unimprinted and nanograting film. Left column C-AFM height image (a), current image (b), and cross-sectional current graph (c) of unimprinted P3HT thin film. Right column: C-AFM height image (d), current image (e), and cross-sectional graph (f) of P3HT nanograting film. The black lines in graphs (b) and (e) show the directions of cross-sectional images (c) and (f), respectively
