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Page 54
Volume 4
December 10-12, 2018
Rome, Italy
Nano Research & Applications
ISSN: 2471-9838
Advanced Materials 2018
Nano Engineering 2018
JOINT EVENT
22
nd
International Conference on
Advanced Materials
and Simulation
&
22
nd
Edition of International Conference on
Nano Engineering &
Technology
S
imultaneous synthesis of cobalt nanoparticles and carbon
nanotubes directly on conductive substrates are of special
interest since it allows the fabrication of quasi one-dimensional
hybrid systems with tunable properties and a wide range of
applications in nano and microelectronics, spintronic and
magnetic information storage. Since metals are high-surface
energy materials, it is dif cult to stabilize metal nanoparticles
for nanotube growth directly on metal surfaces. In this work we
present a simple and reliable fabrication approach to produce
controlled Co magnetic nanoparticles by solid state dewetting
of metal films deposited on a conductive substrates acting as
barriers. Indeed, refractory conductive lms such as titanium
silicon nitride TiSiN were proposed as barriers to limit catalyst
diffusion into the bulk of the substrate. In addition, the low
surface energy of TiSiN favors catalyst de-wetting, thereby
improving nanotube forest density and verticality. Titaniumsilicon
nitride films were first deposited on silicon wafers by thermionic
vacuum arc. Then, ultra-thin cobalt films with thickness up to 3
nm were deposited on the top of TiSiN; the dewetting process
of the cobalt films was achieved by thermal heating followed by
plasma treatment. After these steps, the initial continuous layer
breaks up into isolated nanoparticles. Finally, carbon nanotube
grow by methane decomposition on the cobalt nanoparticles
by using plasma enhanced chemical vapor deposition (PECVD)
reactor. In particular, the microscopic analysis showed that the
density and the size of the generated nanoparticles depend on
the thickness of the deposited cobalt films as well as the control
of thermally activated processes mainly bulk diffusion. On the
other hand, the magnetic properties measurements confirmed
that the design of nanoparticles and their size distribution control
their coercitive field. In this direction, high-ordered self-organized
cobalt/nanotube hybrid systems could be proposed as functional
nanostructured elements in magnetic information storage
devices.
Recent Publications
1. Rousseau O, et al., (2017) Elaboration and magnetic
properties of cobalt-palladium magnetic nanowires
encapsulated in carbon nanotubes. Journal of Surface
Engineered Materials and Advanced Technology 7(1):1-
12.
2. Chen G, et al., (2016) A sweet spot for highly efficient
growth of vertically aligned single-walled carbon
nanotube forests enabling their unique structures and
properties. Nanoscale 8(1):162-71.
3. Marco Altomare N T N and Patrik Schmuki (2016)
Templated dewetting designing entirely selforganized
platforms for photocatalysis. Chemical Science 7:6865-
6886.
Biography
A Andalouci studied Petrochemical Engineering at the Faculty of the Chem-
istry and Hydrocarbons, Algeria, in 2015, and he also obtained his Master
degree in Physics of Material fromUniversity of Paris 13, France , in 2017. He
is currently a PhD student in the PPANAM axe at the LSPM laboratory of the
University Paris 13. His research interests include the synthesis and func-
tionalization of carbon nanotubes and nanomaterials for microelectronic
and magnetic applications.
andalouciahmed@gmail.comA Andalouci, M Chérif
and
S Farhat
LSPM, CNRS – UPR 3407, Université Paris 13, France
A Andalouci et al., Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C7-028
Carbon nanotube growth on TiSiN supports by
solid-state dewetting of ultra-thin cobalt films