carbon nanotube




the effect of nanotube waviness and agglomeration on the elastic property of carbon nanotube -reinforced composites
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owing to their superior mechanical and physical properties, carbon nanotubes seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low- density. in most of the experimental results up to date, however, only modest improvements

carbon nanotube based composites-a review
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carbon nanofibers and nanotubes are promising to revolutionise several fields in material science and are a major component of nanotechnology. further market development will depend on material availability at reasonable prices. nanotubes have a wide range of

coating of carbon nanotube with nickel by electroless plating method
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a method to fabricate one dimensional nanoscale composite based on coating of carbon nanotube with metal is proposed and demonstrated in this letter. carbon nanotubes have been coated with a layer of nickel by electroless plating. it was found that the nickel coating

straight carbon nanotube y junctions
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carbon nanotube junctions are of great interest in the fundamental research and nanoelectronic applications. identical carbon nanotube y junctions have been successfully synthesized by pyrolysis of methane over cobalt supported on magnesium oxide. the y

development of carbon nanotube -based sensors a review
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carbon nanotubes (cnts) have shown great promise as sensing elements in nanoelectromechanical sensors. in this review paper, we discuss the electrical, mechanical, and electromechanical properties of cnts that are used in such applications. this we discuss a number of recent observations on carbon nanotubes tips. evidence from scanning tunneling microscopy (stm) and spectroscopy (sts) experimentsindicates that the topology of the carbon bond network at the tip, and in particular the relative location of

multi-walled carbon nanotube filled polypropylene nanocomposites based on masterbatch route: improvement of dispersion and mechanical properties through
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multi-wall carbon nanotubes (mwnts) filled polypropylene (pp) nanocomposites were prepared through diluting a pp/mwnt masterbatch in a pp matrix by melt compounding with a twin screw extruder. polypropylene grafted maleic anhydride (pp-g-ma) was used to

improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube
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in this study, electrical, thermal and mechanical properties of multi-walled carbon nanotubes (cnts) reinforced epon 862 epoxy have been evaluated. firstly, 0.1, 0.2, 0.3, and 0.4 wt% cnt were infused into epoxy through a high intensity ultrasonic liquid processor and then

particle exposure levels during cvd growth and subsequent handling of vertically-aligned carbon nanotube films
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carbon nanotubes (cnts) are being researched worldwide to create countless new technologies [1, 2], including transistors, solar cells, biomaterials, and hybrid advanced composites [3 7]. concerns exist about the possibility of nanoscale particle release, notably

static and dynamic analysis of carbon nanotube -based switches
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carbon nanotubes have recently attracted a lot of attention because of their excellent mechanical and electrical properties. carbon nanotubes can be used to design nanoscale sensors, actuators, devices and systems collectively referred to as nanoelectromechanical

tension tension fatigue behavior of unidirectional single-walled carbon nanotube reinforced epoxy composite
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owing to the recent rapid development of synthesis of about 40 mm in length and 3.5 mm in width were cut methods for carbon nanotubes (cnts), high quality, long from the cured thin composite plate, and their edges were and aligned cnt ropes are now available [1 5]

modification and functionalization of multiwalled carbon nanotube (mwcnt) via fischer esterification
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multiwalled carbon nanotubes (mwcnts) were functionalized by different functional groups via the fischer esterification method. nitric acid treatment was first used to remove the catalyst from mwcnts and introduce carboxylic acid groups onto the surface of mwcnts

influence of carbon nanotube clustering on the electrical conductivity of polymer composite films
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electrical conductivity of 150 200 μm thick polysulfone films loaded with 0.05 0.75% w/w multiwall carbon nanotubes was systematically investigated for two types of dispersion states, uniformly dispersed and agglomerated at the micro-scale. the percolation threshold

nanotube size-dependent melting of single crystals in carbon nanotubes
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4258 k), as assumed . 2.2 nanotube size-dependent melting of pb single crystals for a single pb crystal encapsulated in a carbon nanotube , n = 1 and r0 = 2h = 0.70 nm, with h being 0.35 nm [17]. ac- cording to the specific

dielectrophoretic batch fabrication of bundled carbon nanotube thermal sensors
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we present a feasible technology for batch assembly of carbon nanotube (cnt) devices by utilizing ac electrophoretic technique to manipulate multiwalled bundles on an si/sio2 substrate. based on this technique, cnts were successfully and repeatably manipulated

semi-empirical spice models for carbon nanotube fet logic
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to evaluate the potential of carbon nanotube field effect transistors (cnfets) to replace silicon cmos technology, we develop a spice model of cnfet nanoelectronics. our model is parameterizable, and it enables composition of models of various aspects of

electrocatalytic oxidation of levodopa at a ferrocene modified carbon nanotube paste electrode
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levodopa (ld), the biological precursor of catecholamines, is the most widely prescribed drug in the treatment of parkinsons disease. the present work presents a proposal for the application of a carbon paste electrode modified by ferrocene (fc) and carbon nanotubes

an effective way to lower catalyst content in well-aligned carbon nanotube films
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the discovery of carbon nanotubes in the early 1990s patterned porous silicon, respectively. from then on, has opened an entirely ne w field to us in materials production of aligned carbon nanotubes on different subscience. the unique geometrical structure , nice electric

carbon nanotube electronics and photonics
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since the demonstration of fhe first transistors in 1947, computing electronics has been hased mostly on one material, silicon. the emergence of mosfets in the 1960s and the development of microlifhography and other fabrication techniques have allowed the

carbon nanotube chemical and mechanical sensors
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a single-walled carbon nanotube (sw-cnt) is a nano scale tube formed by a cylindrical shell of single atomic layer of carbon atoms. nanotubes have diameter of a few nm and length up to 100µm so that they form extremely thin wires. the atomic structure of swcnt

a schr dinger-poisson solver for modeling carbon nanotube fets
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we present details of a coupled schr dinger-poisson solver for modeling quantum transport effects in carbon nanotube field-effect transistors. the poisson solution is effected using a two-dimensional finite difference algorithm in a coaxial structure with azimuthal symmetry

carbon nanotube materials for hydrogen storage
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carbon single-wall nanotubes (swnts) are capable of adsorbing hydrogen quickly, to high density, at ambient temperatures and pressures. last year, we showed that hydrogen storage densities on swnts made by laser vaporization ranged from 3.5 to 4.5 wt% after a

direct proteins electrochemistry based on ionic liquid mediated carbon nanotube modified glassy carbon electrode
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introduction 3. materials and methods 3.1. chemicals and apparatus 3.2. fabrication of the modified electrode 4. results and discussion 4.1. characterization of the modified electrode 4.2. electrochemical investigation of hemoglobin on the mwnts gel/gc electrode 4.3

synthesis and characterization of carbon nanotube materials
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this paper provides a survey of synthesis, purification, and characterization of carbon nanotubes. resent results obtained at the university of cincinnati on growth and study of carbon nanotube arrays are presented and discussed. the reported achievements in this

multi-wall carbon nanotube supported pt sn nanoparticles as an anode catalyst for the direct ethanol fuel cell
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direct alcohol fuel cells (dafcs) have attracted much attention recently as potential mobile power sources . fuel cells based on direct ethanol conversion (defcs) offer advantages over those based on methanol (dmfcs), because they are safer, more convenient to use

spectroscopic investigation of modified single wall carbon nanotube (swcnt)
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we have investigated the effects of chemical treatment on single wall carbon nanotube (swcnt) before and after being modified with hno3/h2so4 by raman, ftir and uv-vis- nir spectroscopy. the results show successful carboxylation of the cnt sidewalls as

perspectives of single-wall carbon nanotube production in the arc discharge process
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single-wall carbon nanotubes (swnts) promise wide applications in many technical fields. as a result purified swnt material is sold now on the west market at more than $1000 per 1 gram. thus developing an effective technology for swnts production rises to a very

novel approach to fabricating carbon nanotube via interconnects using size-controlled catalyst nanoparticles
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we propose a new approach to fabricating carbon nanotube (cnt) vias, which uses preformed catalyst nanoparticles to grow cnts. a newly-designed impactor provided size- classified catalyst particles, and a new deposition system injected them into via holes down

a comparative scaling analysis of metallic and carbon nanotube interconnections for nanometer scale vlsi technologies
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this paper addresses the critical issue of scaling limits of local interconnects, contact plugs and local vias made of metal. it is shown that the current carrying capacity of copper vias/contacts fails to meet itrs current density requirements beyond the 45 nm technology

characterization of carbon nanotube materials by raman spectroscopy and microscopy a case study of multiwalled and singlewalled samples
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following the discovery of carbon nanotubes (cnt) in 1991-93 [1, 2] a feverish activity has ensued to establish the chemical and physical properties of these novel carbon forms. raman spectroscopy has proved to be useful in this field. however, the understanding of

carbon nanotube industrial applications.
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the success of the above nanocarbon technologies is underpinned by the development of an ultra-high sen- sitivity, high-resolution electron microscope, which has sub-nanoscale accuracy and is able to obtain information on the atomic arrangement, element identification, and electronic

threshold voltage and on-off ratio tuning for multiple-tube carbon nanotube fets
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we demonstrate post-processing techniques to adjust the threshold voltage (vt) and on-off ratio (ion/ioff) of multiple-tube carbon nanotube field effect transistors (cnfets). these post-processing techniques open up an additional degree of freedom to further tune

physical and electrochemical properties of supercapacitor electrodes derived from carbon nanotube and biomass carbon
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green monoliths (gms) were prepared from mixtures of koh (5% by weight), carbon nanotubes (5%) and self-adhesive carbon grains (90%) from oil palm empty fruit bunch fibers. the gms were carbonized up to 600, 700 and 800 c under an n2 gas environment

carbon nanotube structures: molecular dynamics simulation at realistic limit
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single walled carbon nanotubes as all-carbon molecules of tubular form exemplify modern nanometre scale material structures, where the number of atoms range from less than a million up to few millions. such system are quite ideal for computational studies like

temperature dependence of the electrical properties of the carbon nanotube /polymer composites
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in this paper, pristine and oxidized multi-walled carbon nanotube (mwcnt)/poly (vinylidene fluoride)(pvdf) composites were prepared and the temperature dependence of some electrical properties of these composites were studied. it is found that the transition

thermolysis and conductivity studies of poly (ethylene oxide)(peo) based polymer electrolytes doped with carbon nanotube
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in this research, solution-casting technique was employed for the preparation of solid polymer electrolytes poly (ethylene oxide)(peo) films were characterized via differential scanning calorimetry (dsc), impedance spectroscopy (is) and thermogravimetric (tga)

ultrahigh frequency carbon nanotube transistor based on a single nanotube
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(cnt fets) are predicted to have intrinsic cutoff frequencies approaching the thz range. here intrinsic means that the parasitic capacitance due to fringing fields is negligible compared to the gate-source capacitance required to modulate the conductance. in practice

carbon nanotube loaded antenna-based ammonia gas sensor
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carbon nanotubes (cnts) have been researched extensively for gas-sensing applications due to their unique electrical, chemical, and structural properties. single-walled carbon nanotubes (swnts) have been predominantly used due to their superior electrical

fracture toughness of highly ordered carbon nanotube /alumina nanocomposites
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the fracture toughness of highly-ordered multi-wall carbon nanotube -reinforced alumina composites is calculated from experimental data on nanoindentation cracking. a combined analytical and numerical model, using cohesive zone models for both matrix cracking and

multiwall carbon nanotube -filled natural rubber: electrical and mechanical properties.
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the influence of multiwall carbon nanotube (mwnts) contents on electrical and mechanical properties of mwnts-reinforced natural rubber (nr) composites is studied. the volume resistivity of the composites decreases with increasing the mwnts content and the electrical


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