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SEM images of ITO surfaces with and without CNTs in structures of (a) PET/ITO, (b) PET/CNT (deposited from solution)/ITO, (c) PET/ CNT /ITO, and (d) CNT /ITO.
AFM cross section showing height variations of CNT ( solution)-reinforced ITO film surfaces. The inset shows transmission spectra of PET/ITO and PET/CNT /ITO.
Dependence of the surface resistance of PET/ITO and PET/CNT/ITO films on bending curvature radius. The inset shows resistance variation vs reciprocal radii of curvature for PET/ITO. The mark indicates the critical radius for onset of percolating clusters, which lead to fracture of the ITO film.
SEM images of ITO surfaces of (a) PET/ITO and (b) PET/CNT/ITO after bending at radius. Some dark lines and many dark spots are observed in (a). The mark A indicates cracks. Marks and B indicate fragmented delamination of approximately and sizes, respectively. Mark C in (b) indicates CNT-reinforced ITO surfaces. Neither cracks nor fragmentation are observed for CNT-reinforced ITO films.
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