✦ LIBER ✦

Catalyst-free synthesis and luminescence of aligned ZnO nanorods

✍ Scribed by Aurangzeb Khan; Wojciech. M. Jadwisienczak; Henryk. J. Lozykowski; Martin E. Kordesch

Publisher: Elsevier Science
Year: 2007
Tongue: English
Weight: 626 KB
Volume: 39
Category: Article
ISSN: 1386-9477
DOI: 10.1016/j.physe.2007.05.025

No coin nor oath required. For personal study only.

✦ Synopsis

Quasi-aligned undoped ZnO nanorods with diameter in the range 100-300 nm and length of several micrometers have been grown catalyst-free on Si(1 0 0) wafer in a one-step process by direct heating of Zn powders. All nanowires are single crystals and are aligned vertically to the substrate surface with c-axis preferred orientation. XRD, HRTEM and Raman studies revealed that the ZnO nanorods have wurtzite phase, are highly crystalline and well aligned with the lattice parameters a ¼ 0.32 nm and c ¼ 0.52 nm. The PL spectra measured at different temperatures are dominated by excitonic emission at $380 nm and less intense below band gap emission band centered at 520 nm.

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