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

Sukjoon Hong; Junyeob Yeo; Wanit Manorotkul; Hyun Wook Kang; Jinhwan Lee; Seungyong Han; Yoonsoo Rho; Young Duk Suh; Hyung Jin Sung; Seung Hwan Ko

doi:10.1039/C3NR34346D

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

Sukjoon Hong,‡^a Junyeob Yeo,‡^a Wanit Manorotkul,^a Hyun Wook Kang,^c Jinhwan Lee,^a Seungyong Han,^a Yoonsoo Rho,^a Young Duk Suh,^a Hyung Jin Sung^c and Seung Hwan Ko*^ab

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* Corresponding authors

^a Applied Nano Technology and Science (ANTS) lab, Mechanical Engineering Department, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea
E-mail: maxko@kaist.ac.kr

^b KI for the Nano Century, KI for the optical science and technology, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea

^c Mechanical Engineering Department, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, Korea

Abstract

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.

Nanoscale

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

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

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