Synthesis of Coil-Like Shape CNTs by Thermal CVD Method

The coil-like shape carbon nanotubes (CNTs) were synthesized on stainless steel substrates using acetylene gas (C2H2) at 750oC under pressure of 4110−× bar by thermal chemical vapor deposition (CVD) method. The formation of catalytic nanoparticles used hydrogen (H2) as the environment gas. The scanning electron microscope (SEM) image shown the average coil diameter of CNTs is 0.8µm and 0.1 nm for the average coil pitch of CNTs. The Raman spectrum shown the defect of CNTs and indicate that the carbon samples were tubes.

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ZnO nanostructures epitaxially grown on ZnO seeded Si (100) substrates by chemical vapor deposition

MRS Proceedings ◽

10.1557/proc-1178-aa06-21 ◽

2009 ◽

Vol 1178 ◽

Author(s):

Zhuo Chen ◽

Tom Salagaj ◽

Christopher Jensen ◽

Kai Shum

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Chemical Vapor ◽

Excitation Power ◽

Zno Thin Films ◽

Excitation Power Density ◽

Zno Nanostructures ◽

Cvd Method ◽

Nanowire Networks ◽

Scanning Electron

AbstractZnO nanostructures such as nanowire-networks and vertical nanorods were epitaxially grown on pre-seeded Si (100) substrates by chemical vapor deposition (CVD) method with a solid source. Crystalline ZnO seeds were prepared and controlled by the rapid thermal annealing (RTA) treatment of e-beam deposited amorphous ZnO thin films. Both epitaxially grown ZnO nanostructures and pre-deposited ZnO seeds were characterized by scanning electron microscopy (SEM), and photoluminescence (PL) spectroscopy. Excellent optical characteristics of these nanostructures such as PL line width, linearity of PL intensity as a function of excitation power density were obtained.

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EFFECT OF SYNTHESIZING PARAMETERS ON MORPHOLOGY AND DIAMETER OF CARBON NANOTUBES GROWN BY THERMAL CVD METHOD

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/54/5a/12065 ◽

2018 ◽

Vol 54 (5A) ◽

pp. 91

Author(s):

Nguyen Cong Tu

Keyword(s):

Carbon Nanotubes ◽

Vapor Deposition ◽

Reduction Process ◽

Chemical Vapor ◽

Substrate Material ◽

Chemical Vapor Deposition Method ◽

Deposition Method ◽

Thermal Chemical Vapor Deposition ◽

Cvd Method

Carbon nanotubes were synthesized by thermal chemical vapor deposition method. There were parameters of the synthesizing process which influence the morphology and quality of nanotubes such as substrate material, the topology of substrates, the reduction process, and growing temperature. The topology of substrate affected the uniform of nanotubes. The reduction process using NH3 reductant helped reducing diameter of carbon nanotubes. Growing temperature complexly modified the quality of carbon nanotubes.

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Synthesis and Investigation of MoO3 Microfilms and Nanorods by Thermal Chemical Vapor Deposition

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.690.23 ◽

2016 ◽

Vol 690 ◽

pp. 23-27

Author(s):

Pitchanunt Chaiyo ◽

Ladarat Kanlayavisut ◽

Rinnatha Vongwatthaporn ◽

Bok Ki Min ◽

Seong Jun Kim ◽

...

Keyword(s):

Raman Spectroscopy ◽

Chemical Vapor Deposition ◽

Electron Microscope ◽

Scanning Electron Microscope ◽

Vapor Deposition ◽

Chemical Vapor ◽

Photoemission Spectroscopy ◽

X Ray ◽

Thermal Chemical Vapor Deposition ◽

Scanning Electron

MoO3 microfilms and nanorods can be synthesized by using the powder of MoS2 as starting materials by thermal chemical vapor deposition. The prepared products on substrates were investigated by field emission scanning electron microscope (FESEM), X-ray photoemission spectroscopy (XPS) and Raman spectroscopy. FESEM images showed the uniformly microfilms and nanorods-like with diameter around 50-100 nm and length of about through 5 μm, respectively. XPS patterns and Raman shifts revealed the prepared products consisting of MoO3 structure phases.

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The Effect of Inoculum in the Preparation of Fermented Tapioca for Nanotechnology Applications Based on the Surface Morphology of CNTs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.667.363 ◽

2013 ◽

Vol 667 ◽

pp. 363-366

Author(s):

M.Z. Nuraini ◽

S. Aishah ◽

S.F. Nik ◽

Mohamad Rusop

Keyword(s):

Surface Morphology ◽

Vapor Deposition ◽

Gas Flow ◽

Deposition Time ◽

Chemical Vapor ◽

Deposition Process ◽

Carbon Precursor ◽

Thermal Chemical Vapor Deposition ◽

Thermal Cvd ◽

Spin Coater

Fermented tapioca which is a new starting material was used as a carbon precursor. Carbon nanotubes (CNTs) were deposited on silicon wafer (Si) by Thermal Chemical Vapor Deposition (TCVD). The gas flow of Argon (Ar) was constant at 70 bubbles per minute and 20 minutes of deposition time. Before the deposition process, silicon was coated with Nickel using spin coater. Various parameters such as amount of inoculums have been studied. Surface morphology and uniformity were characterized using FESEM. The surface morphology and uniformity of CNTs are dependents on parameters used. The optimum CNTs that produced using Thermal CVD was 1.5 wt% of inoculums due to the size and the uniformity of CNTs growth.

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Effects of Experimental Configuration on the Morphology of Two-Dimensional ZnO Nanostructures Synthesized by Thermal Chemical-Vapor Deposition

Crystals ◽

10.3390/cryst10060517 ◽

2020 ◽

Vol 10 (6) ◽

pp. 517

Author(s):

Seok Cheol Choi ◽

Do Kyung Lee ◽

Sang Ho Sohn

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Chemical Vapor ◽

Morphological Properties ◽

Two Dimensional ◽

Zno Nanostructures ◽

Au Catalyst ◽

Thermal Chemical Vapor Deposition ◽

Si Substrates ◽

Cvd Method

Using two experimental configurations, self-assembled zinc oxide (ZnO) nanostructures including nanoplates, nanosaws, and nanobelts were synthesized by thermal chemical-vapor deposition (CVD), and their morphological properties were investigated. ZnO nanostructures grown on Au-coated Si substrates in a parallel setup revealed highly defined ZnO nanoplates and branched nanowires. ZnO nanostructures grown in a perpendicular setup using Si substrates with and without the Au catalyst exhibited vertically oriented ZnO nanosaws and randomly aligned nanobelts, respectively. In the thermal CVD method, experiment conditions such as oxygen-flow rate, growth temperature, and catalyst, and experimental configurations (i.e., parallel and perpendicular setups) were important parameters to control the morphologies of two-dimensional ZnO nanostructures showing platelike, sawlike, and beltlike shapes.

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FTIR Studies of Carbon Nanotubes Produced from Fermented Tapioca Prepared by Thermal-CVD

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.667.538 ◽

2013 ◽

Vol 667 ◽

pp. 538-541

Author(s):

S. Aishah ◽

M.Z. Nuraini ◽

S.F. Nik ◽

Mohamad Rusop

Keyword(s):

Carbon Nanotubes ◽

Vapor Deposition ◽

Fourier Transformation ◽

Growth Process ◽

Chemical Properties ◽

Chemical Vapor ◽

Thermal Chemical Vapor Deposition ◽

Thermal Cvd ◽

Ftir Studies ◽

Fourier Transformation Infrared Spectroscopy

Fermented tapioca prepared at different temperature was prepared and used as a starting material in CNTs synthesis using 2-system thermal chemical vapor deposition (TCVD) method. The CNTs was deposited on nickel coated silicon where the nickel acts as catalyst in the growth process. The size of CNTs growth is dependent to the temperature. The prepared CNTs were analyzed using Fourier transformation infrared spectroscopy (FTIR) to determine the chemical properties in the sample. Fourier transform infrared (FTIR) spectroscopy was carried out in the range of 450-4000 cm-1 to study the attachment of the impurities on carbon nanotubes.

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