US – Page 371 – TechConnect Briefs

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 [...]

Polymeric Nanocomposites Enabled by Controlled Architecture Materials

Shefelbine T.A., Marx R.E., Nelson J.M., Longabach J.W., Brostrom M.L., Bucket M.I., 3M Corporate Research, US

This presentation will focus on the use of Controlled Architecture Materials (CAMs): block copolymers, telechelic, gradient and star branched polymers as additives to induce the exfoliation of nanoclays in thermoplastic resins. Conventional exfoliation methods include [...]

Three-dimensional Structure of Nanocrystals from High-energy X-ray Diffraction and Atomic Pair Distribution Function Analysis

Petkov V., Central Michigan University, US

3-D, nanocrystal, high-energy, X-ray, diffraction, atomic pair, distribution function analysis

Strain and Structure in Nanocrystals

Bae Y., Caflisch R.E., University of California, Los Angeles, US

Layered nanocrystals consist of a core of one material surrounded by a shell of a second material. Because of the small size of these systems, their atomic structure is epitaxial in many cases. Lattice mismatch [...]

Effect of Nano-architectural Control on Optical Loss in Electro-optic Polymers

Huang D., Parker T.C., Lumera Corporation, US

Polymer electro-optic (EO) devices show great promise for high-speed telecom data transmission, broadband radio frequency (RF) signal distribution, and high-speed data transfer within the next generation of microprocessors running at 20 GHz and above (i.e., [...]

Environmentally Friendly Pathways for Synthesis of Titanium Dioxide Nano-particles

Li H., Sunol A.K., Sunol S.G., Sunol A.K., Sunol S.G., University of South Florida, US

Titanium Dioxide is an important catalyst for oxidation of hazardous compounds in air and water particularly for photo-catalysis. Although it is traditionally used for photo-catalysis with UV light, when its energy band gap is reduced, [...]

Vibrational Modes of Metal Nanoshells

Kirakosyan A.S., Shahbazyan T.V., Jackson State University, US

We study coherent oscillations of radial breathing modes in metal nanoparticles with a dielectric core. Vibrational modes are impulsively excited by a rapid heating of the particle lattice that occurs after laser excitation, while the [...]

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, [...]

Vibrating Nanotube–based Nano Powder Production System

Akhatov I.S., Jang B.Z., Rastgaar Aagaah M., Schmidt D.R., Mitlyng A.S., Stewart M.B., Mahinfalah M., North Dakota State University, US

In this paper we present a new nano powder production method. Basic idea of this method is as follows: a nanotube being placed in a vapor atmosphere will provoke condensation of vapor on the tip [...]

Synthesis of Polymer-Coated Magnetic Nanoparticles

Dey T., O'Connor C.J., AMRI-UNO, US

ATRP approach was employed to synthesis polymer-coated magnetite nanoparticles and was therefore characterized by various methods. The challenge was to obtain a thin shell and particles in an unagglomerated state. Several factors were found to [...]