scholarly journals Synthesis of Carbon Nanofibers on Copper Nanopowders by Low-Temperature CVD

2017 ◽  
Vol 18 (4) ◽  
pp. 283 ◽  
Author(s):  
G. Partizan ◽  
B.Z. Mansurov ◽  
B.S. Medyanova ◽  
А.B. Koshanova ◽  
M.E. Mansurova ◽  
...  
Keyword(s):  
Low Temperature ◽  
Carbon Nanofibers ◽  
Chemical Vapor ◽  
Temperature Growth ◽  
Copper Clusters ◽  
Transmission Electron ◽  
Diffraction Patterns ◽  
Stable Growth ◽  
Different Diameters ◽  
Copper Nanopowders

The article presents the results of experiments on the synthesis of carbon nanofibers by thermal chemical vapor deposition using copper nanopowders obtained by electric explosion of wire as catalysts. Stable growth of carbon nanofibers was carried out at temperatures significantly lower than normally used. The process parameters that are optimal for low-temperature growth of carbon nanofibers have been identified during the performed experiments. The synthesized samples have different diameters and morphology (from spiral to direct). Copper clusters are both at the ends and inside the fibers. The results of IR spectroscopy indicate that the structure of the obtained carbon nanofibers is polymeric. X-ray analysis revealed the presence of a halo on the diffraction patterns at small values of the angle 2θ, which proves that the grown<br />structures have an amorphous nature. There are no groups that are responsible for long-range order in all Raman spectra. Studies by transmission electron microscopy showed that nanostructures do not have an internal channel and nanofibers are solid.

Structure And Morphology Of Carbon Nanofibers Synthesized On Cu Nanopowders

2016 ◽  
Vol 11 (3) ◽  
pp. 62-71
Author(s):  
Gulmira Partizan ◽  
Batyr Mansurov ◽  
Botagoz Medyanova ◽  
Аizhan Koshanova ◽  
Madina Mansurova ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Chemical Vapor ◽  
Temperature Growth ◽  
Copper Clusters ◽  
Transmission Electron ◽  
Amorphous Nature ◽  
Diffraction Patterns ◽  
Stable Growth ◽  
Different Diameters ◽  
Copper Nanopowders

This article presents the results of experiments on the synthesis of carbon nanofibers by thermal chemical vapor deposition using copper nanopowders obtained by electric explosion of wire as catalysts. Stable growth of carbon nanofibers was carried out at temperatures significantly lower than normally used. The process parameters that are optimal for low-temperature growth of carbon nanofibers have been identified during the performed experiments. The synthesized samples have different diameters and morphology (from spiral to direct). Copper clusters are both at the ends and inside the fibers. The results of IR spectroscopy indicate that the structure of the obtained carbon nanofibers is polymeric. X-ray analysis revealed the presence of a halo on the diffraction patterns at small values of the angle 2θ, which proves that the grown structures have an amorphous nature. There are no groups that are responsible for long-range order in all Raman spectra. Studies by transmission electron microscopy showed that nanostructures do not have an internal channel and nanofibers are solid.

A Novel TEM Technique for Characterizing As-Grown CVD Diamond Films

1991 ◽  
Vol 49 ◽  
pp. 956-957 ◽  
Author(s):  
Z.L. Wang ◽  
J. Bentley ◽  
R.E. Clausing ◽  
L. Heatherly ◽  
L.L. Horton
Keyword(s):  
Diamond Films ◽  
Chemical Vapor ◽  
Growth Direction ◽  
Dark Field ◽  
Growth Surface ◽  
Specimen Preparation ◽  
Transmission Electron ◽  
Diffraction Patterns ◽  
First Time ◽  
Microstructural Studies

Microstructural studies by transmission electron microscopy (TEM) of diamond films grown by chemical vapor deposition (CVD) usually involve tedious specimen preparation. This process has been avoided with a technique that is described in this paper. For the first time, thick as-grown diamond films have been examined directly in a conventional TEM without thinning. With this technique, the important microstructures near the growth surface have been characterized. An as-grown diamond film was fractured on a plane containing the growth direction. It took about 5 min to prepare a sample. For TEM examination, the film was tilted about 30-45° (see Fig. 1). Microstructures of the diamond grains on the top edge of the growth face can be characterized directly by transmitted electron bright-field (BF) and dark-field (DF) images and diffraction patterns.

scholarly journals Practical Route for the Low-Temperature Growth of Large-Area Bilayer Graphene on Polycrystalline Nickel by Cold-Wall Chemical Vapor Deposition

ACS Omega ◽  
2021 ◽  
Author(s):  
Muhammad Aniq Shazni Mohammad Haniff ◽  
Nur Hamizah Zainal Ariffin ◽  
Poh Choon Ooi ◽  
Mohd Farhanulhakim Mohd Razip Wee ◽  
Mohd Ambri Mohamed ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Low Temperature ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Bilayer Graphene ◽  
Cold Wall ◽  
Polycrystalline Nickel ◽  
Large Area ◽  
Temperature Growth ◽  
Low Temperature Growth

Low Temperature Large Scale CVD Synthesis of Nano Onion-Like Fullerenes

2012 ◽  
Vol 490-495 ◽  
pp. 3211-3214 ◽  
Author(s):  
Lei Shan Chen ◽  
Cun Jing Wang
Keyword(s):  
Electron Microscopy ◽  
Low Temperature ◽  
Aluminum Hydroxide ◽  
Large Scale ◽  
Iron Catalyst ◽  
Chemical Vapor ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Naoh Solution ◽  
Synthesis Reactions

Synthesis reactions were carried out by chemical vapor deposition using iron catalyst supported on aluminum hydroxide at 400 °C and 420 °C, in the presence of argon as carrier gas and acetylene as carbon source. The aluminum hydroxide support was separated by refluxing the samples in 40% NaOH solution for 2 h and 36% HCl solution for 24 h, respectively. The samples were characterized by field-emission scanning electron microscopy, energy dispersive spectroscopy, high-resolution transmission electron microscopy and X-ray diffraction. The results show that carbon nanotubes were the main products at 420 °C, while large scale high purity nano onion-like fullerenes encapsulating Fe3C, with almost uniform sizes ranging from 10-50 nm, were obtained at the low temperature of 400 °C.

Low-Temperature Growth of Carbon Nanofiber by Thermal Chemical Vapor Deposition Using CuNi Catalyst

2006 ◽  
Vol 45 (6A) ◽  
pp. 5329-5331 ◽  
Author(s):  
Katsunori Aoki ◽  
Tetsurou Yamamoto ◽  
Hiroshi Furuta ◽  
Takashi Ikuno ◽  
Shinichi Honda ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Low Temperature ◽  
Vapor Deposition ◽  
Carbon Nanofiber ◽  
Chemical Vapor ◽  
Temperature Growth ◽  
Low Temperature Growth ◽  
Thermal Chemical Vapor Deposition

scholarly journals Low-temperature growth of highly crystalline β-Ga2O3 nanowires by solid-source chemical vapor deposition

2014 ◽  
Vol 9 (1) ◽  
pp. 347 ◽  
Author(s):  
Ning Han ◽  
Fengyun Wang ◽  
Zaixing Yang ◽  
SenPo Yip ◽  
Guofa Dong ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Low Temperature ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Temperature Growth ◽  
Low Temperature Growth
Sign in / Sign up

Export Citation Format

Share Document