Papers – Page 87 – TechConnect Briefs

Novel Reactor Utilizing Selective Heating Catalytic Nanoparticles for Low-Temperature Growth of Carbon Nanotubes

Vasenkov A.V., Kolobov V.V., Carnahan D., CFD Research Corporation, US

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 [...]

One-Step Flame-Synthesis of Carbon-Embedded and -Supported Platinum Clusters

Ernst F.O., Büchel R., Strobel R., Pratsinis S.E., ETH Zürich, CH

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. [...]

Ways to Increase the Length of Single Wall Carbon Nanotubes in a Magnetically Enhanced Arc Discharge

Keidar M., Levchenko I., Shashurin A., Waas A.M., Ostrikov K., The George Washington University, US

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 [...]

Simultaneous Tip and Base Growth of Carbon Nanotubes Produced by RF Plasma Enhanced CVD

García-Céspedes J., Pascual E., Bertran E., IN2UB, Universitat de Barcelona, ES

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 [...]

Conducting Polymer Nanocomposites: Role of DNA Functionalized Carbon

Cheung W., Bogozi A., Ma Y., Mao G., Mao G., He H., Rutgers University, US

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-situ synthesis of Cu nanoparticles on MWCNTS using Microwave irradiation

Rangari V.K., Dey S., Jeelani S., Tuskegee University, US

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 [...]

Studies on Carbon Nanotubes – Polyaniline Based Composites

Lal C., Kumar A., Kumar S., Kumar A., Kumar S., Gupta T.K., National Physical Laboratory (NPL), IN

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 [...]

Month: June 2008