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Nanoscale. 2013 May 7;5(9):3698-703. doi: 10.1039/c3nr34346d. Epub 2013 Mar 15.

Digital selective growth of a ZnO nanowire array by large scale laser decomposition of zinc acetate.

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Applied Nano Technology and Science (ANTS) lab, Mechanical Engineering Department, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea.


We develop a digital direct writing method for ZnO NW micro-patterned growth on a large scale by selective laser decomposition of zinc acetate. For ZnO NW growth, by replacing the bulk heating with the scanning focused laser as a fully digital local heat source, zinc acetate crystallites can be selectively activated as a ZnO seed pattern to grow ZnO nanowires locally on a larger area. Together with the selective laser sintering process of metal nanoparticles, more than 10,000 UV sensors have been demonstrated on a 4 cm × 4 cm glass substrate to develop all-solution processible, all-laser mask-less digital fabrication of electronic devices including active layer and metal electrodes without any conventional vacuum deposition, photolithographic process, premade mask, high temperature and vacuum environment.

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