Laser-assisted growth of molybdenum rods

K. L. Björklund, P. Heszler, M. Boman

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this paper, we report for the first time the laser-assisted growth of molybdenum rods via the H2 reduction of MoF6 with a focused Ar+ laser beam as the heat source. By varying the gas composition, total pressure, and laser power rods with different morphologies were deposited on a tungsten wire. At low H2/MoF6 molar ratios crystal-like rods were obtained and at higher molar ratios the rods became dendrite-like. The activation energy for the process was determined to be 77 ±7 kJmol-1 in the temperature range 705-840 K. The reaction order showed to be nearly 3 with respect to the hydrogen partial pressure and zero order with respect to the molybdenum hexafluoride partial pressure. Compositional and morphological characterisation were performed with scanning electron microscopy, energy dispersed X-ray spectroscopy and Auger electron spectroscopy.

Original languageEnglish
Pages (from-to)179-183
Number of pages5
JournalApplied Surface Science
Volume186
Issue number1-4
DOIs
Publication statusPublished - Jan 28 2002

Fingerprint

Molybdenum
Partial pressure
molybdenum
rods
Tungsten
Lasers
Auger electron spectroscopy
X ray spectroscopy
lasers
Laser beams
partial pressure
Hydrogen
Activation energy
Gases
Wire
Crystals
Scanning electron microscopy
gas composition
dendrites
heat sources

Keywords

  • Laser-assisted CVD
  • MEMS
  • Molybdenum rods

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Laser-assisted growth of molybdenum rods. / Björklund, K. L.; Heszler, P.; Boman, M.

In: Applied Surface Science, Vol. 186, No. 1-4, 28.01.2002, p. 179-183.

Research output: Contribution to journalArticle

Björklund, K. L. ; Heszler, P. ; Boman, M. / Laser-assisted growth of molybdenum rods. In: Applied Surface Science. 2002 ; Vol. 186, No. 1-4. pp. 179-183.
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