Carbon Nanotube Synthesis From Metal Nanoparticles Size-Classified by a Differential Mobility Analyzer

2011 ◽  
Author(s):  
Masahiro Tomoda ◽  
Teppei Kawahara ◽  
Yohei Tasaki ◽  
Yasuyuki Takata ◽  
Makoto Hirasawa ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Nanoparticles ◽  
Chemical Vapor ◽  
Laser Vaporization ◽  
Electrical Mobility ◽  
Differential Mobility Analyzer ◽  
Differential Mobility ◽  
Catalyst Metal ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this study, carbon nanotubes (CNTs) were synthesized from size-classified catalyst metal nanoparticles to observe the effect of the nanoparticles’ diameter on the diameter of the CNTs. The nanoparticles were generated by laser vaporization and classified by a differential mobility analyzer, which sorts them by diameter according to differences in electrical mobility. After classification, the nanoparticles were collected on a Si substrate. CNTs were synthesized from these catalyst metal nanoparticles by using chemical vapor deposition. This experiment synthesized mainly multi-walled carbon nanotubes (MWNTs), with a small amount of single-walled carbon nanotubes (SWNTs). The reason is thought to be that the particles’ diameters were appropriate for MWNT synthesis.

scholarly journals Synthesis and Purification of Carbon Nanotubes

2021 ◽  
Author(s):  
Syed Awais Rouf ◽  
Zahid Usman ◽  
Hafiz Tariq Masood ◽  
Abdul Mannan Majeed ◽  
Mudassira Sarwar ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Arc Discharge ◽  
Synthesis Method ◽  
Single Layer ◽  
Chemical Vapor ◽  
Laser Vaporization ◽  
Advantages And Disadvantages ◽  
Synthesis Techniques ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this chapter, we will evaluate the synthesis and purification of carbon nanotubes. Carbon nanotubes are cylindrical molecules that consists of graphene (rolled up of a single-layer carbon atom). A wide variety of synthesis techniques such as arc discharge synthesis, laser ablation of graphite/laser vaporization synthesis method, chemical vapor deposition (CVD), high pressure carbon monoxide synthesis and flame synthesis techniques, have been implemented to grow single and multi-walled carbon nanotubes for technological applications. All of the above methods exploit transition metals, like iron, cobalt, and nickel, as a catalyst. There are number of methods (filtering, chromatography and centrifugation) used to purify the carbon nanotubes, but the degree of purity remained questionable in these methods. In order to enhance the purification extent, alternate techniques such as Gas phase purification, Liquid phase purification and Purification by Intercalation are introduced. Here we will discuss the advantages and disadvantages of these purification routes. It will help researchers in selecting appropriate and effective method for synthesis and purification of carbon nanotubes.

Electron Microscopy and Raman Characterization of Multi-Walled Carbon Nanotubes Grown by Chemical Vapor Deposition

2008 ◽  
Vol 14 (S2) ◽  
pp. 304-305
Author(s):  
M Ellis ◽  
T Jutarosaga ◽  
S Smith ◽  
Y Wei ◽  
S Seraphin
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
New Mexico ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Raman Characterization

Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008

The Effect of Inoculum in the Preparation of Fermented Tapioca for Nanotechnology Applications Based on FT-IR Studies

2013 ◽  
Vol 667 ◽  
pp. 534-537
Author(s):  
M.Z. Nuraini ◽  
S. Aishah ◽  
S.F. Nik ◽  
Mohamad Rusop
Keyword(s):  
Carbon Nanotubes ◽  
Gas Flow ◽  
Deposition Time ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Ir Studies ◽  
Multi Walled Carbon Nanotubes ◽  
Ft Ir ◽  
Walled Carbon Nanotubes ◽  
Ft Ir Spectroscopy

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. Chemical functional groups of carbon nanotubes were characterized using FT-IR Spectroscopy. The FT-IR result shows peaks attributed to multi–walled carbon nanotubes (MWCNT) vibration modes.

Synthesis of Carbon Nanotubes from Polycyclic Compounds by CVD Method

2006 ◽  
Vol 320 ◽  
pp. 163-166 ◽  
Author(s):  
Koji Yamada ◽  
Kentaro Abe ◽  
Masafumi Mikami ◽  
Morihiro Saito ◽  
Jun Kuwano
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Quartz Substrate ◽  
Chemical Vapor ◽  
Polycyclic Compounds ◽  
Cvd Method ◽  
Multi Walled Carbon Nanotubes ◽  
Synthesis Of Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes (MWCNTs) were synthesized from camphor by a chemical vapor deposition (CVD) method in a range of 750-900. The catalyst was fed in three ways: (a) a sputtered Fe-film on a quartz substrate (b) vaporized ferrocene in an Ar flow; (c) both of (a) and (b). In the case (c), highly pure, dense and aligned MWCNT arrays formed on the quartz substrate at 850, whereas nonaligned MWCNTs formed in the cases (a) and (b).

scholarly journals Co metal nanoparticles deposition inside or outside multi-walled carbon nanotubes via facile support pretreatment

2018 ◽  
Vol 456 ◽  
pp. 657-665 ◽  
Author(s):  
Mariya A. Kazakova ◽  
Andrey S. Andreev ◽  
Alexander G. Selyutin ◽  
Arcady V. Ishchenko ◽  
Alexander V. Shuvaev ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Nanoparticles ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A Welding Method for Carbon Nanotubes

2010 ◽  
Vol 160-162 ◽  
pp. 737-742 ◽  
Author(s):  
J.W. Zhang ◽  
Zhen Luo ◽  
Y.L. Li ◽  
J.D. Zhu ◽  
J. Hao
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Chemical Vapor ◽  
Optical Microscope ◽  
Weld Strength ◽  
Chemical Vapor Deposition Method ◽  
Welding Method ◽  
Close Proximity ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A simple and reliable welding method was developed to weld carbon nanotubes with the power supply here. The carbon nanotubes were synthesized chemical vapor deposition method and Multi-walled carbon nanotubes was uesd here. Firstly, apply less than 5 V voltages between carbon nanotubes when they were in close proximity under direct view of optical microscope. Then, let carbon nanotube contact with each other and increase the external voltage to 7–8V until carbon nanotube was attached to the end of the other, the two carbon nanotube join into a carbon nanotube. Furthermore, some experiments were implemented to analyze the reliability, the images of the weld joint and the weld strength all indicted this method were reliable.

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