Carbon Nanotubes – TechConnect Briefs

Diagnostics of carbon nanotube composites by Raman spectroscopy

Puech P., Bassil A., Barrau S., Demont P., Bacsa R.R., Bacsa W.S., Flahaut E., Bacsa R.R., Bacsa W.S., University Paul Sabatier, FR

Carbon nanotube polymer composites are very promising for applications due to their exceptional mechanical and electronic properties to improve the elastic properties of polymers or to make polymers conductive. The large surface of carbon nanotubes [...]

Millimeter long vertically aligned single-walled carbon nanotubes by an ultra long lifetime of catalysts

Iwasaki T., Zhong G., Yoshida T., Aikawa T., Morikane R., Kawarada H., Waseda University, JP

Controlling the growth direction of SWNTs on a substrate is one of the most important issues for fabrication of SWNT-based applications, such as field effect transistors (FETs) and interconnects for LSI. We have succeeded in [...]

Diameter controlled synthesis of carbon nanotubes by CVD using steric-stabilized iron nanoparticle catalysts

Mayya K.S., Lee S., Yeo I-S, Chung U-I, Moon J.T., Samsung Electronics Co.Ltd., KR

Carbon nanotubes (CNT) are the subject of intensive investigation due to their potential applications in nanoelectronics, biological sensors, high performance materials etc. CNTs can be synthesized using variety of techniques of which synthesis using chemical [...]

Separating Single-Walled Carbon Nanotubes by Length

Rauwald U., Schmidt D.J., Hauge R.H., Smalley R.E., Ziegler K.J., University of Florida, US

Single-walled carbon nanotubes (SWNTs) have received great attention because of their unique electronic and mechanical properties combined with their chemical stability. Typically, SWNTs are microns in length; however, intermediate lengths between small spheroidal fullerenes and [...]

Gated Chemical Transport and Enhance Flow through Carbon Nanotube Membranes

Majumder M., Chopra N., Hinds B.J., University of KY, US

A promising architecture for ion-channel mimetics is a composite membrane structure containing vertically aligned carbon nanotubes, with inner core diameters of 7 nm, passing across a polystyrene matrix film. Plasma oxidation during the fabrication process [...]

Determination of relative concentrations of metallic and semi-conducting SWNTs in suspension via dielectrophoresis

Mureau N., Mendoza E., Hoettges K.F., Silva S.R.P, Hughes M.P., University of Surrey, UK

Dielectrophoresis (DEP) is a phemomenon of induced particle motion in non-uniform electric fields. The effect is frequency dependent; by monitoring the motion of particles in AC fields and ananlysing the change in motion with frequency, [...]

Investigation of Carbon Nanotube Mechanical Properties Using Atomistic-Continuum Mechanics Method

Wu C-J, Chou C.Y., Han C-N, Chiang K.N., Advanced Microsystem Packaging and Nano-Mechanics Research Laboratory, National Tsing Hua University, TW

This paper utilizes atomistic-continuum mechanics method (ACM) to investigate the mechanical properties of single-walled carbon nanotubes (SWCNTs). Fundamental to the proposed concept is the perception that a carbon nanotube is a geometrical frame-like structure, and [...]

Self-Welded Metal-Catalyzed Carbon Nanotube Piezoresistors with Very Large Longitudinal Piezoresistivity of ~ 4×10-8 Pa-1

Tabib-Azar M., Wang R., Xie Y., Case Western Reserve University, US

Self-welded multi-walled carbon nanotube (MWCNT) bridges, grown using low-pressure metal-catalyzed chemical vapor deposition technique between silicon posts, were used as tiny piezoresistors to monitor vibration and bending/deformation of silicon cantilever beams for the first time. [...]

In Situ Synthesis of Carbon Nanotubes by Polymer Materials

Huang C.W., Hsu L.C., Li Y.Y., CCU, TW

Catalytically grown carbon nanotubes were prepared by in situ thermal decomposition of the polymer materials. Polymer material (PEG, polyethylene glycol) was employed as carbon source and nickel-based materials were used as catalytic precursors. These materials [...]

Synthesis of Narrow Diameter Multiwalled Carbon Nanotubes (MWNTs) By Catalytic Chemical Vapor Deposition For Mechanical Reinforcement Applications

Mohamed N.M., Tan Y.C., Kadir A.K., Universiti Teknologi PETRONAS, MY

Strong and versatile carbon nanotubes (CNTs) are finding new applications in improving conventional polymer-based fibers. Nanotube-reinforced composites could ultimately provide the foundation for a new class of strong and lightweight fibers with properties such as [...]

CNT Composites for Aerospace Applications

Bellucci S., Balasubramanian C., Borin P., Micciulla F., Rinaldi G., INFN-Laboratori Nazionali di Frascati, IT

Carbon nanotubes are being widely studied for various applications ranging from medical to electronics and also optical devices. They are also being studied for the suitability and applications in aerospace and aeronautical field. A useful [...]

Absorption Characteristics of Single Wall Carbon Nanotubes

Haque S., Marinelli C., Udrea F., Milne W.I., Cambridge University, UK

In this paper the absorption characteristics of Carbon Nanotube(CNT) is determined using CNT samples with varying thickness in the range of 1470-1580nm. The absorption coefficient of carbon nanotube is determined to be equal to ~24 [...]

CMOS Compatability of Carbon Nanotubes on SOI Devices

Haque M.S., Oei S.P., Teo K.B.K., Udrea F., Gardner J.W., Milne W.I., Cambridge University Engineering Department, UK

This paper reports for the first time PECVD and CVD growth of MWNTs both aligned and non aligned on high temperature partially depleted CMOS SOI substrates. We also report for the first time the growth [...]

Ultrafine Carbon Nitride Nanocrystals Synthesized by Laser Ablation in Liquid Solution

Yang L., May P.W., Smith J.A., Yin L., University of Bristol, UK

Crystalline carbon nitride nanopowders and nanorods have been successfully synthesized at room temperature and pressure using the novel technique of pulsed laser ablation of a graphite target in liquid ammonia solution.The experimental composition and structure [...]

Composite Carbon Nanostructures as Promising Carriers for Gaz Analysis

Majoli L., Evstratov A., Guillot J.-M., Rouvière A., Baussand P., Ales High Mining School, FR

In the framework of the project ACI NPD-37 “NSC-Env” supported by the French Ministry of Research and New Technologies, a kind of nanostructured carbon based composite materials was developed in order to propose new efficient [...]

Polydispersed Detonation Nanodiamond and Approaches for its Fractioning

Petrov I., Detkov P., Walch J., Shenderova O., Scientific and Industrial Company “New Technologies”, RU

We will discuss the rationale and methods of fractioning of the DND depending on the sizes of the agglomerates in the initial as-received DND powder. It is well known that primary (monocrystalline) DND particles have [...]

Application-Specific Detonation Nanodiamond Particulate

Shenderova O., McGuire G., Petrov I., Spitsyn B., Puzur A., Kuznetsov V., International Technology Center, US

We will discuss several approaches to DND modification and surface functionalization that results in particles sizes ranging from tens to hundreds of nanometers that are stable in a variety of solvents. DND specific for biological [...]

A Grand Canonical Monte-Carlo Simulation of the Textural, Mechanical and Adsorption Properties of Faujasite zeolite Carbon Replica

Roussel T., Bichara C., Pellenq R.J.-M., Centre de Recherche en Matière Condensée et Nanosciences, CNRS, FR

The development of the negative templating process to obtain a carbon replica from an ordered inorganic template has lead to the synthesis of new carbon materials which have interesting textural properties attractive for energy storage. [...]

Pore-Size Control of Carbon Nanospace with Ultrasonic Irradiation

Ohkubo T., Hori R., Tsuchiya K., Sakai H., Abe M., Tokyo University of Science, JP

In this study, we examined the micropore-size control on activated carbons by ultrasonic irradiation with various conditions.Pitch-based activated carbon fiber (ACF; AD’ALL Co. Ltd.) was used for the sample having relatively uniform micropores whose micropore [...]

Role of Nanoscale Topography on the Super-Hydrophobicity: A Study of Fluoro-Based Polymer Film on vertically Carbon Nanotubes

Phani A.R., Grossi V., Passacantando M., Santucci S., University of L'Aquila, IT

The unique electronic, mechanical and chemical properties of carbon nanotubes making them most promising candidate for the building blocks of molecular-scale machines, and nanoelectronic devices. On the other hand, highly hydrophobic films are being actively [...]

Exfoliated Graphite Nanoplatelets (xGnP): A Carbon Nanotube Alternative

Drzal L.T., Fukushima H., Michigan State University, US

Nanocomposites are opening up ‘windows of opportunity’ for new applications of polymers to not only structural but also non structural areas by providing ways to tailor surface, electrical, thermal and barrier properties. The choices of [...]

Carbon nanotube Josephson junctions

Jørgensen H.I., Grove-Rasmussen K., Lindelof P.E., NanoScience Center, DK

We have succeeded in making reproducible superconducting contacts to gated single-walled carbon nanotubes (SWCNTs). Devices with two types of superconducting trilayer electrodes are fabricated; Ti/Al/Ti and Ti/Nb/Ti. We have devices both in the high transparency [...]

ZnO Nanoparticles Beaded Multiwalled Carbon Nanotubes

Zhu Y., Elim H.I., Foo Y.L., Triparthy S., Quek W.T., Ji W., Thong J., Sow C.H., National University of Singapore, SG

In this work, we report a hybrid system of ZnO nanoparticles on MWNT scaffolds synthesized via a very simple and straightforward process. This involved the coating of pure Zn on as-grown aligned MWNT films, followed [...]

Nanotube in a periodic potential: A conveyer belt for electrons

Novikov D.S., Princeton University, US

We consider a carbon nanotube in the presence of an externally appliedperiodic potential. We show that, as a function of gate voltage that controls electron density (counted from the half-filled pi-band), the electron states can [...]

Spin Glass Behaviour of Magnetic Carbon Nanoclusters

Rode A.V., Christy A.G., Madsen N.R., Gamaly E.G., Luther-Davies B., Arcon D., Zorko A., Jaglicic Z., The Australian National University, AU

Carbon nanoclusters produced by high-repetition-rate laser ablation of graphite and glassy carbon in Ar exhibits para- and ferromagnetic behavior up to 90 K, showing a narrow hysteresis curve with a coercive force Hc = 420 [...]

Field emission characteristics of carbon nanofibers grown on the electroplated copper micro-tips

Sung W-Y, Kim W-J, Kim Y.H., Lee H.Y., Lee S.M., Yoo H-S, Lee H.Y., Lee S.M., Joo S-K, Kim W-J, Kim Y.H., Seoul National University, KR

Carbon nanofibers (CNFs) were synthesized on micro-copper tips by using direct current plasma enhanced chemical vapor deposition of C2H2 and NH3 gas at 480℃. The copper micro-tips were uniformly formed by high current electroplating and [...]

Interfacial Properties of Carbon Nanotube Arrays

Zalamea L., Pipes R.B., Purdue University, US

The present study springs from the investigation of Salvetat et al.4 wherein the ratio of flexural deformation to applied load of the carbon nanotube array was used to determine a reduced Young’s modulus and effective [...]

Vibration damping/dynamic properties of CNT-reinforced composite structures

Kireitseu M.V., Rolls-Royce Centre in Damping, the University of Sheffield, UK, UK

Energy dissipation (damping) in structures/materials is important as it reduces resonant amplitudes/noise levels giving enhanced integrity and life cycle behavior. If we then go to the nanoscale, the damping levels/dynamics of materials are mostly unknown [...]

Qubit Entanglement from a Bipartite Atomic System in a Carbon Nanotube

Bondarev I.V., Vlahovic B., North Carolina Central University, US

The development of materials that may host quantum coherent states is a critical research problem for the nearest future. Important would be to demonstrate quantum information transfer between two quantum bits arbitrarily separated in the [...]

Dispersion and rheological aspects of SWNTs in ultra high molecular weight polyethylene

Zhang Q., Lippits D.R., Vaidya S.N., Rastogi S., Eindhoven University of Technology, NL

A new method is developed to homogeneously disperse single-walled carbon nanotubes bundles (SWNTs) in an intractable polymer, for example, ultrahigh molecular weight polyethylene (Mw>3*106 g/mol) (UHMWPE). The dispersion is obtained by spraying an aqueous solution [...]

Quantum Dot Modified Multiwall Carbon Nanotubes

Olek M., Büsgen T., Mulvaney P., van Embden J., Hilgendorff M., Mulvaney P., Giersig M., CAESAR, DE

The key advantage of our research is a noninvasive functionalization of carbon nanotubes, which ensures good dispersion and stability of carbon nanotubes (CNT) in a vast range of organic and inorganic solvents. The method can [...]

Unique Roles of DNA Wrapped SWNTs: In-situ Fabrication of Self-Doped Polyaniline Nanocomposites

Ma Y.F., Ali S.R., He H.X., Rutgers University, US

Inspired by the remarkable electrical conductivity, the superior mechanical properties of carbon nanotubes(CNTs), and the rich optical, electrical and electrochemical properties of conducting polymers, nanocomposites of conducting polymers and CNTs have been pursued with a [...]

New route to manufacture high performance carbon nanotubes nanocomposites based on pre-dispersed concentrates generated by in-situ polymerization

Claes M., Bonduel D., Pegel S., Alexandre M., Poetschke P., Dubois P., Luizi F., Nanocyl SA, BE

We describe here an original method which relies upon the in situ polymerization of olefin catalyzed by a highly active metallocene complex physicochemically anchored onto the carbon nanotube surface. As a result, carbon nanotubes are [...]

Conductive Carbon-Nanotube/Polymer Composites: Spectroscopic Monitoring of the Exfoliation Process in Water and the Crucial Role of Wetting

Grossiord N., Loos J., Meuldijk J., Regev O., Miltner H.E., Van Mele B., Koning C.E., Eindhoven University of Technology, NL

For the preparation of conductive polystyrene/SWNT nanocomposites, a recently developed, versatile, latex-based technology is applied. A low molar mass PS fraction, probably acting as a wetting agent for the SWNTs, seems to be required for [...]

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