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Synthesis and (some) applications of carbon-nanotube-supported pyrolytic carbon nanocones

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Title Statement Synthesis and (some) applications of carbon-nanotube-supported pyrolytic carbon nanocones
 
Added Entry - Uncontrolled Name Paredes, Germercy ; Center of Elaboration of Materials and Structural Studies (CEMES), UPR-8011 CNRS, Toulouse University, Toulouse 31055, France
Seinea, Grégory ; Center of Elaboration of Materials and Structural Studies (CEMES), UPR-8011 CNRS, Toulouse University, Toulouse 31055, France
Coursa, Robin ; Center of Elaboration of Materials and Structural Studies (CEMES), UPR-8011 CNRS, Toulouse University, Toulouse 31055, France
Houdelliera, Florent ; Center of Elaboration of Materials and Structural Studies (CEMES), UPR-8011 CNRS, Toulouse University, Toulouse 31055, France
Allouchea, Hatem ; Center of Elaboration of Materials and Structural Studies (CEMES), UPR-8011 CNRS, Toulouse University, Toulouse 31055, France
Ondarçuhuc, Thierry ; Institute of Fluid Mechanics of Toulouse (IMFT), UMR 5502 CNRS, Toulouse 31055, France
Piazzab, Fabrice ; Nanoscience Research Laboratory, Pontifical Catholic University Madre y Maestra (PUCMM), Apartado Postal 822, Santiago De Los Caballeros 51000, Dominican Republic
Monthiouxa, Marc ; Center of Elaboration of Materials and Structural Studies (CEMES), UPR-8011 CNRS, Toulouse University, Toulouse 31055, France
 
Uncontrolled Index Term Micro-/nano-cones, Growth mechanisms, Pyrolytic carbon, Near-field microscopies, Electron emitters
 
Summary, etc. Graphene-based cones with nanosized apex can be obtained by means of a high temperature pyrolytic carbon depositionprocess using methane and hydrogen as gaseous feedstock and single carbon nanotubes as deposition substrates. Aside thecones, micrometer-sized carbon beads or fibre segments are deposited meanwhile which are a key morphological componentfor allowing handling and mounting the carbon cones and then using them for various applications. Based on both theliterature dealing with pyrolytic carbon deposition processes and experimental observations, a peculiar depositionmechanism is proposed, involving the transient formation of pitch-like liquid phase droplets which deposit onto theindividual carbon nanotubes. In this picture, it is believed that a key parameter is the diameter ratio for the droplets and thenanotubes, respectively. The cone concentric texture and perfect nanotexture are shown by high resolution transmissionelectron microscopy, which allows interesting mechanical and conducting properties to be predicted. Correspondingly,applications of the carbon nanocones as electron emitters for cold-field electron sources on the one hand, and as probes forvarious modes of near-field microscopy on the other hand, have been tested.
 
Publication, Distribution, Etc. Indian Journal of Engineering and Materials Sciences (IJEMS)
2021-03-24 10:24:59
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJEMS/article/view/47547
 
Data Source Entry Indian Journal of Engineering and Materials Sciences (IJEMS); ##issue.vol## 27, ##issue.no## 6 (2020): IJEMS- DECEMBER 2020
 
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