Nanomechanical Imaging Of Multi-Walled Carbon Nanotubes

2003 ◽  
Vol 778 ◽  
Author(s):  
Lata Muthuswami ◽  
P. M. Ajayan ◽  
R. E. Geer
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Response ◽  
Defect Density ◽  
Arc Discharge ◽  
Contact Stiffness ◽  
Chemical Vapor ◽  
Recent Experimental Data ◽  
Multi Walled Carbon Nanotubes ◽  
Axial Variation ◽  
Walled Carbon Nanotubes

AbstractNanomechanical mapping of individual multi-walled carbon nanotubes (MWNTs) has been undertaken to investigate intra-tube variations of mechanical response. Ultrasonic force microscopy has been used to measure the relative axial and radial variations of contact stiffness of individual MWNTs synthesized using chemical vapor deposition (CVD) and arc-discharge (AD) techniques. For CVD-based MWNTs the contact stiffness of the tube was seen to vary strongly across volume defects (axial variation of the tube radius) and is assumed to result from the high crystalline defect density associated with such radial variations. These observations support recent experimental data of effective Young's modulus inferred from electrostatically-induced nanotube vibration amplitudes.

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.

Cure and Dynamic-Mechanical Behaviors of Vinyl Ester Resinfilled with Multi-Walled Carbon Nanotubes

2010 ◽  
Vol 150-151 ◽  
pp. 1413-1416 ◽  
Author(s):  
Hong Yan Chen ◽  
Zhen Xing Kong ◽  
Ji Hui Wang
Keyword(s):  
Carbon Nanotubes ◽  
Vinyl Ester ◽  
Mechanical Response ◽  
Cure Kinetics ◽  
Crosslinking Density ◽  
Vinyl Ester Resin ◽  
Scanning Calorimetry ◽  
Dynamic Mechanical ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The cure kinetics of Derakane 411-350, a kind of vinyl ester resin, and its suspensions containing multi-walled carbon nanotubes( MWCNTs) were investigated via non-isothermal dynamic scanning calorimetry (DSC) measurements. The results showed that incorporation of MWCNTs into vinyl ester resin excessively reduces polymerization degree and crosslinking density of vinyl ester resin. For suppressing the negative effect caused by nanotubes, the higher temperature initiator combined with the initiator MEKP was used. Dynamic-mechanical Behavior testing was then carried out on the cured sample in order to relate the curing behavior of MWCNTs modified resin suspensions to mechanical response of their resulting nanocomposites. It was revealed that nanocomposites containing MWCNTs possessed larger storage modulus values as well as higher glass transition temperatures (Tg) as compared to those without MWCNTs after using mixed intiators system to improve the degree of cure.

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.

Catalytic metal-free formation of multi-walled carbon nanotubes in atmospheric arc discharge

Carbon ◽  
2012 ◽  
Vol 50 (12) ◽  
pp. 4588-4595 ◽  
Author(s):  
Yoong Ahm Kim ◽  
Hiroyuki Muramatsu ◽  
Takuya Hayashi ◽  
Morinobu Endo
Keyword(s):  
Carbon Nanotubes ◽  
Arc Discharge ◽  
Metal Free ◽  
Multi Walled Carbon Nanotubes ◽  
Catalytic Metal ◽  
Walled Carbon Nanotubes

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).

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