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We report a novel method for large scale catalyst-free zinc oxide nanowires (ZnO NWs) network growth on Si substrate using chemical vapor deposition (CVD). The SiO2 layer of the Si substrate is photoetched to SiO2 square pillar array which works as the growth core of urchin-like ZnO NW lump, and the NWs cross over each other forming an integrated network. This method achieves controlled growth of...
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