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Nanoshell carbon (NS) have properties such as hollow shell like structure, size range of primary particle (20–50nm in diameter), high rate of electron transfer and excellent dispersivity in aqueous solutions without surface modification. Investigation of cytochrome c (cyt c) adsorption was performed against NSs prepared by varying carbonization catalysts (Co, Fe) and temperatures (800, 1000°C). Higher...
Composite carbon molecular sieve membranes (c-CMSM) were prepared from phenolic resin loaded with boehmite by a single dipping–drying–pyrolysis step. The composite membrane was analyzed by scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, mercury porosimetry, CO 2 adsorption and permeation experiments. It was produced...
Composite materials can be enhanced by grafting a secondary material to a functional group on the surface of the reinforcing fibers to improve thermal, electrical or mechanical properties. Grafting secondary materials onto carbon fibers is often limited by the low reactivity of graphitic carbon and there is strong demand to create novel grafting methods with versatile functional groups. One desirable...
The physisorption of methane in idealized bundles of single walled carbon nanotubes (SWCNT) is investigated in detail in this work employing computational. Several aspects related to the possible application of nanotubes as fuel gas containers are analyzed employing molecular dynamics simulations. The influence of the nanotube diameter on the adsorption capacity of the material and the distribution...
Two nanosized carbonaceous fillers, vapor grown carbon nanofibers and exfoliated graphite nanoplatelets, were used to prepare poly(lactide acid) composites at various concentrations from 0 up to 20wt.%. The two fillers were also combined in order to explore possible synergistic actions. Two compounding processes, melt mixing and polymer dissolution, and two forming methods, injection and compression...
We present the wall number control of carbon nanotube (CNT) forests grown on metal catalyst films in a water-assisted chemical vapor deposition (CVD) by measuring the sheet resistances of metal catalyst films. Catalyst film thicknesses and thickness variations are monitored using a 2-point-based electrical characterization methodology. The electrical characterization and high-resolution transmission...
An easy and scalable approach is reported for the production of multi-layer graphene nanoribbons (GNRs) from thermally treated unzipped multi-walled carbon nanotubes (MWCNTs) by controlled oxidation and intercalation. The prepared GNRs are characterized using transmission and scanning electron microscopy, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy...
A Sn coated single multi-walled carbon nanotube (MWCNT) was connected between Cu terminals and with other MWCNTs using tin solder. HRTEM micrographs showed the interconnections between two sides as well as on one side of a Cu grid. MWCNTs not only formed straight connections but also bent in the middle with little damage to the graphenes of nanotubes. The process also joined a single nanotube with...
Bi(2,2′-bipyridyl)-pyrene derivative functionalized ruthenium(II) complexes anchored on graphene sheets (B-Ru-P/GS nanohybrid) by π–π interaction were fabricated. The formation of the nanohybrid was verified by atomic force microscopy, fluorescence spectra and Raman spectroscopy. An obvious and stable electrochemiluminescence of the B-Ru-P/GS nanohybrid at the electrode was revealed. A typical photoelectrical...
The present work addresses the validation process of an in-house developed image analysis tool to extract fringe length, tortuosity, and separation from high resolution transmission electron microscopy images of carbonaceous materials. In order to validate the algorithm, we compare fringe properties that are extracted from high resolution transmission electron microscopy (HRTEM) images through (1)...
Gel-spun polyacrylonitrile (PAN) and carbon nanotube (CNT) composite fibers have been stabilized using various processing conditions to study the kinetics of stabilization reactions. Differential scanning calorimetry, infrared spectroscopy, wide angle X-ray diffraction and thermo-gravimetric analysis studies suggest that individual stabilization reactions can be separated at different stabilization...
An attempt has been undertaken to obtain a better understanding of the friction and wear mechanisms of C/C composites by microstructural analysis of the friction surface layer and wear debris using scanning electron microscopy and transmission electron microscopy. The friction and wear properties of C/C composites of rough laminar pyrocarbon with added resin-derived carbon have been investigated with...
Hierarchical structured carbide-derived carbons (CDC) are produced by high temperature chlorination of silicon carbides containing free silicon (Si/SiC). The influence of free silicon in the precursor carbide on the resulting pore and carbon structure and production rate is studied. The two phases – free silicon and silicon carbide – of Si/SiC gives the possibility to synthesize a monolithic carbon...
A scratch technique was used to measure the adhesion strength of plasma sprayed carbon nanotube (CNT) reinforced aluminum oxide (Al 2 O 3 ) splat on the steel substrate. The effect of adding carbon nanotube on the adhesion strength of a single splat was studied by varying the CNT content as 0, 4 and 8wt.% in the Al 2 O 3 matrix. Higher lateral force was required by...
We report the photo-thermal properties of single and double wall carbon nanotubes (CNT) dispersed in various solvents with different concentrations when exposed to near infrared nm laser irradiations. All these studies were correlated to the dispersivity of CNT in various solvents. The observed temperature increase of the various nanotube solutions was found to be determined by the concentration of...
A simple wet-deposition method for preparing patterned carbon nanotube (CNT) thin films is reported. Using electrophoretic deposition (EPD), CNTs were deposited over indium tin oxide (ITO) plates that had been patterned with a photoresist; consequently, CNTs covered not only the exposed ITO areas but also the photoresist areas because thinness of the photoresists could not prevent the transverse deposition...
It is now a widely accepted fact that oxidized graphene surfaces are populated, to a greater or lesser extent, with epoxide groups. And yet the origin of these groups has heretofore been mysterious. We report the results of a computational (DFT) analysis of this issue carried out by combining the theoretical and experimental knowledge of three seemingly unrelated fundamental processes: (i) formation...
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