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SEM images. (a) The arrays of Au nanodots on the Si substrate after the Au thermal evaporation followed by removing part of the UTAM on the Si substrate. ZnO nanowires grown by CVD after Au deposition (b) on the UTAM itself, (c) on the Au nanodot area, and (d) on the Au film area of the Si substrate.
(a) SEM image of the ZnO nanopores film grown on the bare UTAM. (b) EDS spectrum of the ZnO nanopores film on the UTAM in the square area of (a).
Schematic diagram in four steps (a)–(d) of the growth process of the vertical highly ordered ZnO nanowires arrays.
(a) Schematic diagram of the measurement setup of the piezoelectric properties of the ZnO nanowire arrays using the CAFM. (b) AFM topographic image and the (c) corresponding 3D electric image of the current output peaks of the ZnO nanowire arrays in the scan area of . (d) Typical topographic line scan profile of an individual ZnO nanowire (red curve) and the corresponding output current (purple curve) of the same nanowire.
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