US – Page 284 – TechConnect Briefs

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 [...]

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 [...]

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 [...]

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 [...]

Solubilization of Single Wall Carbon Nanotubes with Salmon Sperm DNA

Kim S.N., Singh K., Ounchen F., Grote J., Naik R., NRC, US

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 [...]

Biocompatibility of Carbon Nanotubes for Cartilage Tissue Engineering

Chahine N.O., Collette N.M., Thompson H., Loots G.G., Lawrence Livermore National Lab., US

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 [...]

Electronic structure of single wall carbon nanotubes under transverse external electric fields, radial deformations and defects

Shtogun Y.V., Woods L.M., University of South Florida, US

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 [...]

Single Walled Carbon Nanotubes based Ionic Building Blocks for Nanoelectronic Devices

Yadav Y., Prasad S., Portland State University, US

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, [...]

Nanocatalysts Assisted Growth of Diamond Films on Si by Hot Filament CVD

Teng C.C., Ku F.C., Deng J.P., Sung C.M., Lin C-T, Northern Illinois University, US

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 [...]