fulltext.study @t Gmail

IR laser-induced formation of amorphous Co–C films with crystalline Co, Co2C and Co3C nanograins in a graphitic shell

Paper ID Volume ID Publish Year Pages File Format Full-Text
27039 43996 2010 9 PDF Available
Title
IR laser-induced formation of amorphous Co–C films with crystalline Co, Co2C and Co3C nanograins in a graphitic shell
Abstract

IR laser irradiation of Co in vacuum leads to deposition of Co films and when carried out in gaseous benzene or ethyne (0.5–50 Torr) it results in deposition of Co–C films, which was accounted for by concurrent laser-induced ablation of Co and dielectric breakdown in gaseous hydrocarbons. The laser-induced decomposition of the hydrocarbons was studied by FTIR spectroscopy and GC and GC/MS techniques and shown to yield a number of volatile unsaturated hydrocarbons and a solid carbonaceous material that resulted from dehydrogenation and carbonization reactions in the gas phase. The detailed analysis of the Co–C films by X-ray diffraction, FTIR, X-ray photoelectron, Auger and Raman spectroscopy and electron microscopy revealed that the Co–C films are amorphous and contain crystalline Co, Co2C and Co3C nanograins embedded in a shell of hexagonal graphite and amorphous sp3-hybridized carbonaceous matrix. The Co, Co2C and Co3C nanograins were identified by transmission electron microscopy as separate entities preferring, in the given order, a face-centered cubic, orthorhombic and hexagonal phase. The laser-induced process represents a novel approach to deposition of Co–C phases containing fcc-Co constituent.

Keywords
IR laser; Hydrocarbon decomposition; Cobalt ablation; Nanostructured cobalt–carbon films
First Page Preview
IR laser-induced formation of amorphous Co–C films with crystalline Co, Co2C and Co3C nanograins in a graphitic shell
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 210, Issues 2–3, 25 February 2010, Pages 153–161
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us