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ACS Nano. 2017 Dec 26;11(12):12311-12317. doi: 10.1021/acsnano.7b06098. Epub 2017 Nov 1.

Nanowire-on-Nanowire: All-Nanowire Electronics by On-Demand Selective Integration of Hierarchical Heterogeneous Nanowires.

Author information

1
Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
2
Department of Electrical Engineering and Computer Science, University of Michigan , Ann Arbor, Michigan 48109, United States.
3
Laser Thermal Lab, Department of Mechanical Engineering, University of California , Berkeley, California 94720, United States.
4
Department of Mechanical Engineering, Ajou University , San 5, Woncheon-Dong, Yeongtong-Gu, Suwon 16499, Korea.
5
Department of Mechanical Engineering, Hanyang University , 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 15588, Korea.
6
Novel Applied Nano Optics Lab, Department of Physics, Kyungpook National University , 80 Daehak-ro, Pook-gu, Daegu 41566, Korea.
7
Institute of Advanced Machinery and Design (SNU-IAMD), Seoul National University , Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.

Abstract

Exploration of the electronics solely composed of bottom-up synthesized nanowires has been largely limited due to the complex multistep integration of diverse nanowires. We report a single-step, selective, direct, and on-demand laser synthesis of a hierarchical heterogeneous nanowire-on-nanowire structure (secondary nanowire on the primary backbone nanowire) without using any conventional photolithography or vacuum deposition. The highly confined temperature rise by laser irradiation on the primary backbone metallic nanowire generates a highly localized nanoscale temperature field and photothermal reaction to selectively grow secondary branch nanowires along the backbone nanowire. As a proof-of-concept for an all-nanowire electronics demonstration, an all-nanowire UV sensor was successfully fabricated without using conventional fabrication processes.

KEYWORDS:

ZnO nanowire; heterogeneous nanowires; hierarchical nanostructures; laser-induced hydrothermal growth; localized heating; silver nanowire

PMID:
29077403
DOI:
10.1021/acsnano.7b06098

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