nanoparticles – Page 35 – TechConnect Briefs

Improvements in High Specific Strength Epoxy-Based Composites using High Magnetic Fields

Mahfuz H., Zainuddin S., Rangari V.K., Jeelani S., Tuskegee University, US

Numerous studies have been carried out, over a period of several years, on the detection of changes in physical characteristics of polymers subjected to high magnetic fields during the curing stages. Extremely large increases in [...]

Synthesis and Characterization of Perovskite Ca0.5Sr0.5MnO3 Nanoparticles in w/o-Microemulsions

López-Trosell A., Schomäcker R., TU Berlin, DE

In the present work, w/o-microemulsions were employed to produce nanoparticles of perovskite Ca0.5 Sr0.5 MnO3. The reaction inside the microemulsion droplets was achieved by addition of sodium hydroxide as co-precipitation agent. Afterward the precursor of [...]

The Impact of Nano-Materials on Coating Technologies

Cayton R.H., Sawitowski T., Nanophase Technologies Corporation, US

Nanocomposite coatings are made by embedding nanocrystalline metal oxide particles in a polymer matrix. The benefits accrued by incorporating nanoparticles into a polymer matrix become economically driven when several advantageous properties are obtained simultaneously, compared [...]

Direct Electrochemical Reduction of CuO Nano Particles to Cu Nano Particles in NaCl Solution

Hwang G-H, Han W-K, Hong S-J, Choi J.W., Kang S-G, Hanyang University, KR

Copper nanoparticles are widely used material. However many reactive metals are difficult to produce without complex and expensive procedures. For low cost and mass production, the electrochemical reduction is a convenient technique to manufacture metal [...]

Synthesis of Antimony Oxide Nanoparticles by Thermal Oxidation

Xu C.H., Shi S.Q., Tang Q., The Hong Kong Polytechnic University, HK

Antimony (Sb) oxide can be used as catalyst, retardant, fining agent, and optical material. Recently, hydrous Sb oxide was found to have high proton conductivity, which is likely to be a promising humidity-sensing material. Oxide [...]

Surface-Enhanced Raman Scattering in Small Noble-Metal Nanoparticles

Pustovit V.N., Shahbazyan T.V., Jackson State University, US

We present a microscopic theory of quantum-size effects in surface-enhanced Raman scattering (SERS) from molecules adsorbed on small metal nanoparticles. In noble-metal nanoparticles, the confining potential has different effect on s-band and d-band electrons. Namely, [...]

Low Temperature Synthesis of Nanosized Metal Oxides by a Supercritical Seed Enhanced Crystallization process (SSEC)

Jensen H., Joensen K.D., Iversen S.B., Søgaard E.G., Aalborg University, DK

A novel low temperature method has been developed to produce nanosized crystalline materials. The method, a Supercritical Seed Enhanced Crystallization (SSEC) process, was shown to lower the crystallization temperature for several metal oxides by a [...]

Uniform Nanoparticle based Monolayers Deposited by a Modified Spin Coating Technique

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

A method for deposition of uniform monolayers of cobalt nanoparticles (size ~ 10 nm) with uniformity in the nanoscale upto the macroscale is demonstrated on a 6" wafer by a modified spin coating method. The [...]

Superparamagnetic Iron Oxide-Gold Core-Shell Nanoparticles for Biomedical Applications

Saini G., Shenoy D., Nagesha D.K., Kautz R., Sridhar S., Amiji M., Northeastern University, US

Iron oxide nanoparticles (NPs) in the form of maghemite and magnetite have been used for targeted drug delivery, magnetic cell sorting, magnetic resonance imaging (MRI) contrast agents and immunoassays. Surface modification of these NPs is [...]

Ferromagnetic Microdisks: Novel Magnetic Particles for Biomedical Applications

Novosad V., Fradin F., Buchanan K.S., Guslienko K.Yu., Yefremenko V., Rosengart A.J., Guy S.G., Bader S.D., Argonne National Laboratories, US

Biomagnetic technologies rely on the ability of biological substances to form supra-molecular structures when they are mixed with magnetic nanoparticles. In this report we will demonstrate how thin film growth technique combined with traditional mask-transfer [...]