Controlled growth of ZnO nanowires by nanoparticle-assisted laser ablation deposition

T. Okada; R. Guo; J. Nishimura; M. Matsumoto; M. Higashihata; D. Nakamura

doi:10.1117/12.760922

15 February 2008 Controlled growth of ZnO nanowires by nanoparticle-assisted laser ablation deposition

T. Okada, R. Guo, J. Nishimura, M. Matsumoto, M. Higashihata, D. Nakamura

Proceedings Volume 6895, Zinc Oxide Materials and Devices III; 68950S (2008) https://doi.org/10.1117/12.760922
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Vertically aligned ZnO nanowires have been successfully synthesized on c-cut sapphire substrates by a catalyst-free nanoparticle-assisted pulsed-laser ablation deposition (NAPLD) in Ar and N₂ background gases. In NAPLD, the nanoparticles formed in a background gas by laser ablation are used as a starting material for the growth of the nanowires. The surface density of the nanowires can be controlled by varying the density of nanoparticles, which are accomplished by changing the energy of the ablation laser, the repetition rate of the laser and so on. When single ZnO nanowire synthesized in a N₂ background gas was excited by 355 nm laser-pulse with a pulse-width of 8 ns, stimulated emission was clearly observed, indicating high quality of the nanowire. These nanowires were used as building blocks for an ultraviolet light emitting diode with a structure of n-ZnO/ZnO nanowire/p-GaN.

Citation Download Citation

T. Okada, R. Guo, J. Nishimura, M. Matsumoto, M. Higashihata, and D. Nakamura "Controlled growth of ZnO nanowires by nanoparticle-assisted laser ablation deposition", Proc. SPIE 6895, Zinc Oxide Materials and Devices III, 68950S (15 February 2008); https://doi.org/10.1117/12.760922

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