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Materials-Metals 2017
Page 34
November 16-17, 2017 Paris, France
13th Annual Conference on
Materials Science, Metal and Manufacturing
Journal of Materials Science and Nanotechnology
Volume 1 Issue 2
Cecile Reynaud et al., Mater Sci Nanotechnol 2017, 1:2
Growth of vertically aligned carbon nanotubes on
metallic surfaces
Cecile Reynaud1, F Nassoy1,2 , M Pinault1, J Descarpentries2, P E Coulon3 and
M Mayne L’Hermite1
1NIMBE-CEA, CNRS, Université Paris-Saclay, France
2NawaTechnologies, France
3LSI-Ecole Polytechnique, Université Paris-Saclay, France
Forests of vertically aligned carbon nanotubes (VACNTs) are
attractive nanomaterials because of their unique structural,
electrical and thermal properties. However, many applications
require their growth on metallic substrates. Catalytic chemical
vapor deposition (CCVD) is the best method to grow them
but the catalytic particles can diffuse rapidly into the metal
subsurface and thus become inactive. In this communication,
I will address this issue through the recent results obtained in
our laboratory. I will show how it is possible to grow VACNT on
carbon fibers, stainless steel and aluminum surfaces by a single-
step process, namely the aerosol assisted CCVD method, where
the catalyst and carbon precursors are injected simultaneously.
In the case of aluminum, due to its low melting temperature,
the synthesis of VACNT requires a significant reduction in the
growth temperature as compared to conventional substrates. Our
results show that, with our single-step process, it is possible to
obtain clean, long and dense VACNTs, with a growth rate at the
best level compared to the state of the art at such low temperature.
A particular attention has been paid to the study of the CNT/
Al interface with various analysis technics: SEM, TEM, EDX,
XPS, GDOES. The results suggest the crucial role of the interface
for an efficient and reproducible VACNT growth. Finally, I will
show that the aerosol-assisted CCVD process can be scaled-up
to enable the fabrication of innovative ultracapacitors based on
VACNTs grown on aluminum foils.
Figure: SEM (A, B) and TEM (C) images of VACNT on
aluminum substrate. STEM/EDX (D) image of CNT/Al interface
(blue: aluminum, red: oxygen, purple: iron).
Recent Publications
• M Delmas, M Pinault, S Patel, D Porterat, C Reynaud, M
Mayne L’Hermite (2012) Growth of long and aligned multi-
walled carbon nanotubes on carbon and metal substrates.
Nanotechnology. 23(10):105604.
• P Landois, M Pinault, S Rouzière, D Porterat, C Mocuta,
E Elkaim, M Mayne L’Hermite, P Launois, In situ time
resolved wide angle X-Ray diffraction study of nanotube
carpet growth: nature of catalyst particles and progressive
nanotube alignment. Carbon. 7:0-10.
• C Castro, M Pinault, D Porterat, C Reynaud, M Mayne
L Hermite. The role of hydrogen in the aerosol-assisted
chemical vapor deposition process in producing thin
and densely packed vertically aligned carbon nanotubes.
Carbon. 61:585-594.
• P Boulanger, L Belkadi, J Descarpentries, D Porterat, E
Hibert et. al. (2013) Towards large scale aligned carbon
nanotube composites: an industrial safe-by-design and
sustainable approach. J. Phys. Conf. Ser. 429:(1):1-12.
• S Lagoutte, P H Aubert, M Pinault, F O Tran Van,
M Mayne-L ’Hermite, C Chevrot (2014) Poly(3-
methylthiophene)/vertically aligned multi-walled carbon
nanotubes: electrochemical synthesis, characterizations
and electrochemical storage properties in ionic liquids.
Electrochim. Acta. 130:754-765.
Biography
Cecile Reynaud has her expertise in the synthesis and chemical physics of
nanomaterials. Her work has mainly dealt with silicon nanocrystals and
aligned carbon nanotubes. She was the head of the Laboratory of Nanometric
Assemblies (LEDNA) in the fundamental research division of the Saclay CEA
center for 15 years. The LEDNA group follows the "bottom-up" approach of
nanosciences. It develops its own synthesis methods for the elaboration of
nano-objects and nanostructured materials with well-controlled characteristics.
The processes of their formation and the characterization of their properties,
especially those induced by size effects, are studied. The applications derived
from these activities are relevant for energy, health, environmental issues and
the development of composite materials. Another strong feature of the group is
the up-scaling of synthesis processes in order to favor industrial transfer.