Original title:
Excimer Laser-Induced CVD of Carbon Encapsulated Cobalt Nanoparticles
Authors:
Fajgar, Radek ; Maryško, Miroslav ; Dřínek, Vladislav ; Kupčík, Jaroslav ; Šubrt, Jan Document type: Papers Conference/Event: ročník mezinárodní konference Nanocon 2011 /3./, Brno (CZ), 2011-09-21 / 2011-09-23
Year:
2011
Language:
eng Abstract:
Decomposition of acetylene / Co(CO)(3)(NO)mixtures induced by excimer ArF laser pulses is an efficient technique for preparation of amorphous cobalt nanoparticles encapsulated in carbon. Vacuum heating up to 900 degrees C leads to crystallization the metal core. The cobalt core crystallizes in a face-centered cubic (beta) form as revealed by X-ray and electron diffraction techniques and carbon affords graphite outer part. Properties of the Co(core) - carbon(shell)nanocomposites were examined by spectroscopy and microscopy techniques. Magnetization studies revealed paramagnetic behavior of the as-prepared amorphous deposit and superparamagnetic behavior of the annealed samples.
Keywords:
amorphous cobalt nanoparticles; carbon encapsulation; magnetic properties Project no.: CEZ:AV0Z4072921 (CEP), CEZ:AV0Z4032918 (CEP), CEZ:AV0Z10100521 (CEP) Host item entry: Sborník příspěvků, pp. 126-141, ISBN 978-80-87294-27-7
Institution: Institute of Chemical Process Fundamentals AS ČR
(web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences. Original record: http://hdl.handle.net/11104/0226266