Amorphous fluorocarbon polymer (a-C:F) films obtained by plasma enhanced chemical vapor deposition from perfluoro-octane (C8F18) vapor I: Deposition, morphology, structural and chemical properties

2004 ◽  
Vol 22 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Costel Biloiu ◽  
Ioana Arabela Biloiu ◽  
Yosuke Sakai ◽  
Yoshiyuki Suda ◽  
Akitsugu Ohta
RSC Advances ◽  
2017 ◽  
Vol 7 (66) ◽  
pp. 41452-41459 ◽  
Author(s):  
Devika Mudusu ◽  
Koteeswara Reddy Nandanapalli ◽  
Sreekantha Reddy Dugasani ◽  
Jang Won Kang ◽  
Sung Ha Park ◽  
...  

SnS nanowires with high aspect-ratio were developed by chemical vapor deposition and their physical and chemical properties were explored, along with their field effect transistor characteristics.


2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Munir Mohammad ◽  
Mohammad Bilal Khan ◽  
Tauqir A. Sherazi ◽  
Jose Anguita ◽  
Damitha Adikaari

We report the fabrication of vertically aligned carbon nanotubes (CNT) composite using thermal chemical vapor deposition (CVD). A forest of vertically aligned CNTs was grown using catalytic CVD. Fluorocarbon polymer, films were deposited in the spaces between vertically aligned MWCNTs using thermal CVD apparatus developed in-house. The excessive polymer top layer was etched by exposing the sample to water plasma. Infrared spectroscopy confirmed the attachment of functional groups to CNTs. Alignment of CNTs, deposition of polymer and postetched specimens were analyzed by field emission scanning electron microscope (FE-SEM). Uniform distribution of monomodel vertically aligned CNTs embedded in the deposited polymer matrix was observed in the micrograph. Observed uniform distribution otherwise is not possible using conventional techniques such as spin coating.


2013 ◽  
Vol 24 ◽  
pp. 46-57 ◽  
Author(s):  
C. Santhosh ◽  
M. Saranya ◽  
S. Felix ◽  
R. Ramachandran ◽  
N. Pradeep ◽  
...  

A simple method is developed for the synthesis of carbon nanotubes (CNTs) using Mo-Co/MgO catalyst by a thermal chemical vapor deposition (CVD) technique. Acetylene was used as the source of carbon and nitrogen as carrier gas. A series of MgO supported Mo-Co catalysts were prepared by the combustion route using urea as the fuel at different stoichiometric ratios. It was found that a higher yield of carbon nanotubes was obtained by the developed catalysts. Also, the addition of molybdenum to Co/MgO catalysts could remarkably increase the yield and also improve the quality of CNTs from thermal CVD with acetylene as precursor gas. The morphology of the catalysts and CNTs obtained was studied by field emission scanning electron microscope (FE-SEM). Other techniques like Raman spectroscopy and XRD were also employed to know the physico-chemical properties of the samples.


2008 ◽  
Vol 368-372 ◽  
pp. 1016-1018
Author(s):  
Xian Feng Xu ◽  
Peng Xiao ◽  
Xiang Xiong

After removal of the resin from PAN-carbon fibers, the fibers were coated with C or SiC by chemical vapor deposition (CVD) and the effects of these CVD coatings on the mechanical and chemical properties of carbon fibers were investigated. DTG analysis was conducted at different temperatures (993K, 1053K and 1113K) to establish the oxidation reaction models of the C/C or C/SiC coated fibers. The results showed that the CVD coatings enhance the oxidation resistance of the carbon fibers. The surface morphology of the CVD C or SiC fibers was investigated by SEM. The tensile strength of the fibers was found to decrease rapidly after CVD, while the Young’s modulus remained almost constant. These changes can be explained by the interface performance of the carbon fibers and the mechanism of CVD C or SiC deposition. The difference in dilatability between the CVD C or SiC layers and the carbon fibers was the main reason for the tensile failure.


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