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. 2021 Jan 4;12:21. doi: 10.1038/s41467-020-20209-w

Fig. 4. The topography and surface potential characteristics of DNTT polycrystalline films measured by Kelvin probe force microscopy (KPFM).

Fig. 4

ac Topography images of DNTT polycrystalline films with grain sizes of 200 nm, 350 nm and 520 nm, respectively. df Surface potential images of DNTT polycrystalline films. gi Line section profile of topography and surface potential.