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AFM height images of carboxylic acid spin coated from m-cresol (a) C20A. b Selected area in (a). The periodicity was determined by the corresponding 2-D FFT images. The z range is 5 nm for both images.
Wan et al. Nanoscale Res Lett 2011 6:49 doi:10.1007/s11671-010-9793-9