The role of ethanol flow rate in CVD process for the diameter control of vertically aligned-SWNTs is presented. Three different flow rates of ethanol (50, 100, and 200 sccm) were supplied to grow VA-SWNTs while [...]
A 13.56 MHz low pressure inductively coupled CH4/CO/H2 plasma has been applied to prepare nanocrystalline diamond particles of 200-700 nm diameter. The minimum diameter of the particles was found to be 5 nm. Two-dimensional platelet-like [...]
A substantial body of research has been focused on the preparation of high purity carbon nanotubes (CNT) in a large scale. Subsequently the purified CNTs can then be filled or functionalized depending on the envisaged [...]
This paper aims to provide a sound basis to face the challenges in large scale atomistic simulations for applications ranging from material sciences and chemistry to nanoelectronics and bio-nanotechnology. In nanoelectronics, large scale ’ab-initio’ simulations [...]
Single-walled carbon nanotubes (SWNTs) with their attractive properties such as large surface-to-volume ratio, high packing density and long-range order may serve as the potential building blocks for the next generation of nanoscale devices. The integration [...]
Several disclosures covering Carbon Nanotube (CNT) based devices for Field Emitter (FE) applications have been published, none of which have shown commercial viability. As a result of our research and development, El-Mul Technologies has recently [...]
Charge transfer due to chemical doping in carbon nanotubes  can be detected through changes in the band shape and spectral shifts of the Raman G-band. In double wall carbon nanotubes, the inner tube is [...]
Single-walled carbon nanotubes (SWNTs) hold great promise for the next generation of electronic devices due to their small, biologically compatible size, exceptional electronic properties, and the range of bandgaps accessible with variations in diameter and [...]
Herein, we report the conductivity of SWNT networks can be dramatically improved by in-situ polymerization of a thin layer of self-doped conducting polymer around and along the carbon nanotubes. The formed conducting polymer improves the [...]
Microfluidizer processors are used for reduction and/or deagglomeration of particles in liquid media. These continuous processors force multiphase fluids through microchannels at velocities of up to 500 m/s, exposing them to high shear and impact [...]
We present fabrication and characterization of a membrane based on carbon nanotubes (CNT) and parylene. Carbon nanotubes have shown orders of magnitude enhancement in gas and water permeability compared to estimates generated by conventional theories [...]
Arkema Inc. produces multi-wall carbon nanotubes (CNTs), and masterbatches from CNTs in various resins. Electrical and mechanical performance of CNT-containing composite systems is presented.
In the theory of the 1-d electron systems, called Tomonaga-Luttinger-liquid (LL), the correlated electron state is characterized by a parameter g that measures the strength of the interaction between the electrons (g=1 for non-interacting electron [...]
Field emission (FE) from carbon nanotubes (CNTs) grown on a cathode substrate is difficult to characterize using simple formulae or data fitting, which is due to (1) electron-phonon interaction (2) electromechanical force field leading to [...]
Vacuum microelectronics has been studied for decades to develop unique devices such as rf-generators, high efficiency flat panel displays, x-ray sources and so on. In recent years field emitters based on carbon nanotubes (CNTs) and [...]
We can observe from the material properties of Diamond-Like Carbon (DNC) several characteristics can be favourable exploited to make MEMS devices with DNC thin films: Extraordinary yield strength, extraordinary stiffness, high indentation hardness and wear [...]
Recently we have reported that some electrophilic molecules, such as 2,4,6-triphenylpyrylium tetrafluoroborate (2,4,6-TPPT) and 1,3-benzodithiolylium tetrafluoroborate (1,3-BDYT), preferentially interact with metallic single-walled carbon nanotubes (SWNTs). It resulted in selective suppression of conductance in metallic carbon [...]
Single molecule detection, aimed both at fundamental investigation and applications, has recently been attracting a lot of attentions. The present set of studies is focused on the design, fabrication and optimization of novel carbon nanotube(CNT) [...]
Production of bone materials is the result of secretory activities by osteoblasts, the bone-forming cells. In the fractured and wounded bone, successful repair and/or regeneration depends on the capacity of osteoblast precursors to proliferate and [...]
The calcium ion channel is a voltage gated channel that enables calcium to enter electrically active cells. Proper function of these channels is essential for gene expression, neuronal excitability, muscle contraction and the release of [...]
The physical properties of the (n,n)/(2n,0); n = 3 and 6 superlattices of the carbon nanotubes (CN’s) has been studied by employing the first–principle pseudopotential method. The curvature effects on the various properties are also [...]
In this research, a water-soluble self-doped polyaniline, poly(aniline N-butylsulfonate) (PAnBuS), was introduced to disperse SWNTs. Dispersion of SWNTs functionalized with PAnBuS was achieved ex-situ by simply mixing both components using ultrasonic treatment. The PAnBuS-functionalized SWNTs [...]
Four different catalysts, nano-Ni, diamond powder (250 ~ 350nm), mixture of nano-Ni/diamond powder, and ultrasonicated nanodiamond (50 nm) seed, on Si wafers were employed to investigate diamond film growth by hot filament CVD (HFCVD). Both [...]
We have successfully demonstrated the single-walled carbon nanotube (SWNT) network based biosensor using aptamers as the protein recognition site. The single-walled carbon nanotube network was used to improve the uniformity in I-V characteristics. Aluminum was [...]
Recent advances in purification, dissolution and dispersion technologies of carbon nanotubes (CNTs) have provided opportunities for the development of various CNT gas sensors[1-2]. Here, we suggest an alcohol vapor sensor using single-walled carbon nanotube (SWCNT)-composites [...]
We present electrical characterization of crossbar ionic nanodevices built using surfactant coated single walled carbon nanotubes (SWCNT’s) via microcontact printing. These nanotube ionic building blocks were synthesized using intrinsic semiconducting SWCNT’s doped with surfactant molecules, [...]
A novel tree-like nanostructure of carbon nanotubes was prepared using growth of vertically aligned nanotubes. As an application of the structures we have used them for fabricating the gas sensor. Because of their unique branched [...]
Our tight-binding results show that energy gap modulations of radially deformed carbon nanotubes by external electric field can be achieved using various field amplitudes and field orientations, and deformation strengths, thus proving many more capabilities [...]
, Bobba F.
, Ciambelli P.
, Cucolo A.M.
, Di Bartolomeo A.
, Giubileo F.
, Iemmo L.
, Mancusi D.
, Sannino D.
, Sarno M.
, University of Salerno, IT
The understanding of the temperature dependence of the electric resistance of carbon nanotubes (CNTs) is a very important feature for the potential utilization as sensing element in temperature nano-sensors. The sensitivity and the time response [...]
Solid phase synthetic process of carbon nano tube using solid precursor comprised of solid state carbon source, metallic catalyst and tube control agent has been reported in the last Nanotech 2007 (Santa Clara). In the [...]
Recently, single graphite layers, referred to as Graphene nanoribbons (GNR) have been prepared experimentally by using conventional methods, such as cutting mechanically exfoloiated graphenes or by patterning epitaxially grown graphenes [1-2]. On the other hand, [...]
A rapid thermal annealing process is demonstrated for defect reduction of multiwalled carbon nanotubes (MWCNTs) using a DC vacuum arc discharge system. The MWCNTs grown by chemical vapor deposition at a relatively low temperature (~650 [...]
In this study, we assess the long-term biocompatibility of CNTs for chondrocyte growth. The effect of CNTs on chondrocyte viability and biochemical deposition are examined in 2D cultures, and in 3D composite materials consisting of [...]
We consider a field emitter on the base of carbon nanotube film consisting from randomly wreathed tubes. Under applied voltage some long ends of nanotubes laying on a surface of film should be straightened by [...]
In this paper, we present a solubilization study of commercially available SWCNTs by using the DNA extracted from waste materials of the salmon fishing industry through an enzyme isolation process. The optical properties, including UV-NIR [...]
ABSTRACT-: Carbon Nanotubes (CNTs) have become leading material for tremendous strategic applications. We have prepared CNT composites with the Polyaniline by solvent and powder methodology. The adhesion, alignment and the effect of composite nature have [...]
Microwave irradiation technique is successfully used to synthesize the copper coated MWCNTS in a one-pot reaction with and without surfactant. Since the graphite carbon absorbs the (in 2min 1100oC) maximum microwave radiation had led to [...]
In this work, a water-soluble self-doped polyaniline nanocomposite was fabricated by in-situ polymerization of 3-aminophenylboronic acid monomers in the presence of single-stranded DNA dispersed- and functionalized- single-walled carbon nanotubes. For the first time, we found [...]
In this work, carbon nanotubes (CNTs) with curly and straight segments were synthesized by means of radio-frequency plasma enhanced chemical vapour deposition (rf-PECVD) onto silicon substrates, using Fe as the catalyst material. The origin of [...]
It is demonstrated that the magnetic field has a profound effect on the length of a single wall carbon nanotube (SWNT) synthesized in the arc discharge. An average length of SWNT increases by a factor [...]
Carbon-embedded or -supported Pt-clusters were made by a scalable, single-step flame spray pyrolysis (FSP) process. Pt-containing precursors was dissolved in xylene and sprayed and combusted in a controlled oxidation atmosphere resulting in nanostructured, carbon-embedded Pt-clusters. [...]
Chemical Vapor Deposition (CVD) of carbon nanotubes (CNTs) and carbon nanofibers (CNFs) is a catalytically controlled synthesis requiring catalyst temperatures in excess of 700°C. The CVD synthesis is typically accompanied by significant substrate heating which [...]
A bubbling fluidized bed reactor having 102mmID and realised in AISI 316L stainless steel has been used as pyrolyser under different operating conditions. The reactor has been operated at fixed fluidising velocity (U=0.16m/s) and at [...]
In this poster, we will discuss about a simple efficient way of producing bimetallic FePt, FeCo alloy nanoparticles that are used as catalysts for continuous growth of forests of MWCNTs by PECVD or thermal CVD [...]
Activated carbon from inexpensive sources has been of great interest for separation systems, efforts had been made to produce AC nanoparticles by different means, in the aim to integrate them to composite materials to enhance [...]
The very small diameters of carbon nanotubes (CNTs) present relatively low resistance to fluid flow. This, combined with their high surface area, means that highly-efficient, bio-contaminant removals are possible with a thin filtration media possessing [...]
A Brownian dynamics simulation for modeling the separation of spheres and rodlike particles in field-flow fractionation (FFF) is developed. Modeling of particle elution for spheres from (10 to 1000) nm was examined. The simulation captures [...]
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2008: Materials, Fabrication, Particles, and Characterization – Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 1
Published: June 1, 2008
Industry sector: Advanced Materials & Manufacturing
Topics: Carbon Nano Structures & Devices