Evolution
of Magnetic and Structural Properties during Iron Plating of Carbon
Nanotubes
Narelle Brack
Peter Kappen
Andy I. R. Herries
Antony Trueman
Andrew N. Rider
10.1021/jp502078t.s001
https://acs.figshare.com/articles/journal_contribution/Evolution_of_Magnetic_and_Structural_Properties_during_Iron_Plating_of_Carbon_Nanotubes/2281417
Iron nanoparticles have been electrochemically
deposited onto carbon nanotube (CNT) films. The CNT films were prepared
by electrophoretic deposition using CNTs that were functionalized
using a novel ozone-based process. Chemical characterization of the
iron films was undertaken as a function of deposition time and related
to their magnetic properties. In the initial stage of film growth,
20 nm cubic iron-rich crystals nucleate on individual CNTs. As the
film grows, the iron crystals coalesce into a more continuous film
and the elemental iron concentrations increase above 70 atomic percent.
Changes in the chemical composition of the films during growth are
reflected in the ferromagnetic properties, which show much higher
coercivity values for thicker films relative to bulk iron. The film
coercivity is related to the nanosized-cubic iron particles which
form on the CNTs and is significantly enhanced when compared to that
of iron films that form on planar graphite substrates, where the cubic
crystal structure is not observed.
2014-06-19 00:00:00
Carbon NanotubesIron nanoparticles
iron concentrations increase
iron films
CNT