Formation of ZnO nanostructures in energy-controlled hollow-type magnetron RF plasma

Keisuke Kumeta, Hideki Ono, Satoru Iizuka

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In this study, we investigated how zinc, sputtered from a zinc target, reacts with oxygen on the substrate to form ZnO nanostructures when the discharge parameters, such as gas flow ratio and target bias voltage, are controlled in O2/Ar plasma. The deposits were estimated by SEM and Raman spectroscopy. Under conditions of a Zn to Ar optical emission intensity ratio of 2/1, a target voltage of - 550 V, a total pressure of 40 Pa, a substrate temperature of 150 °C, an RF power of 50 W, and a deposition time of 30 min, many vertically aligned ZnO nanorods were observed to be deposited on the substrate. The diameter of the rods was typically 50 nm. It was found that the film morphology can be controlled by the sputtering rate of zinc varied by the target bias voltage and gas flow rate.

Original languageEnglish
Pages (from-to)3522-3525
Number of pages4
JournalThin Solid Films
Volume518
Issue number13
DOIs
Publication statusPublished - 2010 Apr 30

Keywords

  • Magnetron plasma
  • RF plasma sputtering
  • Vertically aligned nanorods
  • Zinc oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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