Preparation and characterization of ZnO nanorods, nanowalls, and nanochains

T. Premkumar, Y. F. Lu, K. Baskar

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Abstract

The vertically aligned zinc oxide (ZnO) nanorods were synthesized on silicon (Si) substrate using high-pressure pulsed laser deposition (HPPLD). The aligned ZnO nanorods were obtained at the substrate temperature of 650 °C, oxygen partial pressure of 7 Torr, and the target-substrate distance of 25 mm. The influence of substrate lattice mismatch including gallium nitride (GaN-2%), sapphire (Al2O3-18%), and Si (40%) on the growth of ZnO nanowalls was examined. The interlinked ZnO nanowalls were obtained on GaN substrate, whereas ZnO nanorods were obtained on Al2O3 and Si substrates. The magnesium (Mg) doping has influenced the morphological transition of ZnO from nanorods to nanochains. The chain-like structures were obtained for Mg-doped ZnO target. The growth mechanism has been proposed for the formation of ZnO nanorods, nanowalls, and nanochains. The strong (0002) peak and E2H mode confirmed that the ZnO nanorods, nanowalls, and nanochains are preferentially oriented along c-axis and have good crystalline quality. The near band edge emission (NBE) at 3.27 eV revealed the good optical properties of ZnO nanorods, nanowalls, and nanochains.

Original languageEnglish (US)
Title of host publicationZnO Nanocrystals and Allied Materials
EditorsM.S. Ramachandra Rao, Tatsuo Okada
Pages233-246
Number of pages14
DOIs
Publication statusPublished - Jan 1 2014

Publication series

NameSpringer Series in Materials Science
Volume180
ISSN (Print)0933-033X

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ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Premkumar, T., Lu, Y. F., & Baskar, K. (2014). Preparation and characterization of ZnO nanorods, nanowalls, and nanochains. In M. S. Ramachandra Rao, & T. Okada (Eds.), ZnO Nanocrystals and Allied Materials (pp. 233-246). (Springer Series in Materials Science; Vol. 180). https://doi.org/10.1007/978-81-322-1160-0_11