Papers:
Growth of Nanostructured Diamond, Diamond-Like Carbon, and Carbon Nanotubes in a Low Pressure Inductively Coupled Plasma
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 [...]
New developments in the purification, filling and functionalisation of carbon nanotubes
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 [...]
Linear scaling techniques for first-principle calculations of large nanowire devices
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 [...]
Controlled Assembly of Highly Density SWNT Networks on a Flexible Parylene-C Substrate
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 [...]
First disclosure of a viable semi-commercial single CNT-based FE device
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 [...]
Chemical doping by sulfuric acid in double wall carbon nanotubes
Charge transfer due to chemical doping in carbon nanotubes [1] 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 [...]
The Influence of DNA Wrapping on SWNT Optical Absorption in Perpendicular Polarization
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 [...]
Modeling and simulation of adhesion between carbon nanotubes and surfaces
There have been also many experimental studies which were performed to compare the adhesion properties of carbon nanotubes with that of a gecko’s foot on smooth surfaces. Yurdumakan et al. measured the adhesive force of [...]
Improve Contacts in Carbon Nanotube Networks by In situ Polymerization of Thin Skin of Self-Doped Conducting Polymer
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 [...]
Deagglomeration and Dispersion of Carbon Nanotubes Using MicrofluidizerTM High Shear Fluid Processors
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 [...]
A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes
Park H.G., In J., Kim S., Fornasiero F., Holt J.K., Grigoropoulos C.P., Noy A., Bakajin O., Lawrence Livermore Natioanal Laboratory, US
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. Graphistrength ™ Multi-Wall Carbon Nanotubes
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.
Resistance measurements and weak localization in long SWNTs
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 [...]
Design Optimization of Field Emission from a Stacked Carbon Nanotube Array
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 [...]
High Current Cold Electron Source Based on Carbon Nanotube Field Emitters and Electron Multiplier Microchannel Plate
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 [...]
Advantages and Limitations of Diamond-Like Carbon as a MEMS Thin Film Material
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 [...]
First-principles studies of electrophilic molecules on the carbon nanotubes
Park S., Kong K-J, So H-M, Buh G-H, Lee J-O, Chang H., Korea Research Institute of Chemical Technology, KR
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 [...]
Carbon Nanotube Interfaces for Single Molecular Level Bio Sensing
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) [...]
Osteogenic induction on single-walled carbon nanotube scaffolds
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 [...]
SWNTs inhibit normal physiological function of calcium ion channels through yttrium release
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 [...]
Carbon nanotube superlattices- An oscillatory metallic behaviour
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 [...]
Aqueous Dispersion of Single-Walled Carbon Nanotubes by using Self-doped Polyaniline as Dispersant
Hwang J.H., Lee H.J., Lee H.S., Lee M.H., Hong M.S., Lee H.J., Lee H.S., Lee M.H., Lee H.J., Lee H.S., Lee M.H., Chonbuk National University, KR
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 [...]
Nanocatalysts Assisted Growth of Diamond Films on Si by Hot Filament CVD
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 [...]
Single-Walled Carbon Nanotube Network based Biosensors using Aptamers and its Characteristics
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 [...]
Alcohol vapor sensors using multiple spray-coated SWCNTs
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 [...]
Single Walled Carbon Nanotubes based Ionic Building Blocks for Nanoelectronic Devices
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, [...]
Novel Branched nanostructures of Carbon nanotubes on Si substrates suitable for the realization of gas sensors
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 [...]
Electronic structure of single wall carbon nanotubes under transverse external electric fields, radial deformations and defects
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 [...]
Multiwalled carbon nanotube films as temperature nano-sensors
Di Bartolomeo A., Giubileo F., Sarno M., Altavilla C., Sannino D., Iemmo L., Mancusi D., Bobba F., Cucolo A.M., Ciambelli P., 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 [...]
Nano Structure of Carbon Nano Tube Products Synthesized in Solid Phase
Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Le T.V., Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Huynh P.T., Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Nguyen C.D.T., Nguyen D.V., Nguyen K.C., Nguyen T.N., Mai A.T.N., Saigon Hi Tech Park Research Laboratories, VN
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 [...]
Formation of Single Walled Carbon Nanotubes Via the Interaction of Graphene Nanoribbons: ab initio Density Functional Calculations
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, [...]
Defect reduction of Multiwalled Carbon Nanotubes by Rapid Vacuum Arc Annealing
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 [...]
Biocompatibility of Carbon Nanotubes for Cartilage Tissue Engineering
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 [...]
Exact field enhancement factor, electrostatic force and field emission current from a long carbon nanotube
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 [...]
Solubilization of Single Wall Carbon Nanotubes with Salmon Sperm DNA
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 [...]
Studies on Carbon Nanotubes – Polyaniline Based Composites
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 [...]
In-situ synthesis of Cu nanoparticles on MWCNTS using Microwave irradiation
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 [...]
Conducting Polymer Nanocomposites: Role of DNA Functionalized Carbon
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 [...]
Simultaneous Tip and Base Growth of Carbon Nanotubes Produced by RF Plasma Enhanced CVD
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 [...]
Ways to Increase the Length of Single Wall Carbon Nanotubes in a Magnetically Enhanced Arc Discharge
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 [...]
One-Step Flame-Synthesis of Carbon-Embedded and -Supported Platinum Clusters
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. [...]
Novel Reactor Utilizing Selective Heating Catalytic Nanoparticles for Low-Temperature Growth of Carbon Nanotubes
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 [...]
MWCNTS Production by Means of Pyrolysis of Polyethylene-Terephtalate in a Bubbling Fluidized Bed
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 [...]
Growth and characterization of CNT Forests using Bimetallic Nanoparticles as Catalyst
Lee B.J., Lee G.S., Lee K.H., Sra A.K., Jang H.-S., Lee B.J., Lee G.S., Lee K.H., Overzeta L., Yang D.J., Lee B.J., Lee G.S., Lee K.H., The University of Texas at Dallas, US
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 [...]
Characterization of Activated Carbon particles for nanocomposite synthesis
Terrazas-Bandala L.P., Zaragoza-Contreras E.A., González-Sánchez G., Ballinas-Casarrubias M.L., Advanced Materials Research Center (CIMAV), MX
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 [...]
Multi-Functional Carbon Nanotube Based Filtration Material
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 [...]
Separation Mechanisms for Nanoscale Spheres and Rods in Field-Flow Fractionation (FFF)
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
Topic: Carbon Nano Structures & Devices
ISBN: 978-1-4200-8503-7