US – Page 372 – TechConnect Briefs

Synthesis of Y2O3:Eu Phosphor Nanoparticles by Flame Spray Pyrolysis

Qin X., Ju Y., Bernhard S., Yao N., Princeton University, US

Nanoscale Y2O3:Eu phosphor particles were synthesized by flame spray pyrolysis method and the effects of precursor solution and annealing treatment were discussed. The flame spray pyrolysis system consists of a spray generator, a coflow burner, [...]

Structure Determination of Small Metal Clusters by Density-Functional Theory and Comparison with Experimental Far-Infrared Spectra

Ratsch C., Fielicke A., Behler J., Scheffler M., von Helden G., Meijer G., University of California, Los Angeles, US

The far-infrared vibrational spectra for charged vanadium clusters as well as charged and neutral niobium clusters have been measured size specifically using farinfrared multiple photon dissociation. The ground state energy and vibrational spectra of a [...]

Physicochemical Characterization of Nanosize Zinc Oxide and Titanium Dioxide used as UVR Sunscreen Agents in Cosmetic Formulations

Morfesis A., Fairhurst D., Malvern Instruments, Inc., US

The physical (particulate) sunscreen agents, ZnO and TiO2, are increasingly used to provide UV protection in a wide variety of cosmetic and personal care products. The particle size distribution (PSD) of the ZnO and TiO2 [...]

Acorn™, a New, Simple, Inexpensive Method for Non-Invasive Particle Size Measurement of Suspensions and Droplets

Dhadwal H.S., Mukherjee B., Fairhurst D., Race S.W., Dynamic Cosmetics Inc., US

Nanoscale particle sizing of colloidal suspensions can be performed with Acorn,™ a new, patented handheld device, that combines remote delivery and detection of laser light, and a direct measurement of particle size, without the use [...]

Probing the Morphology and Tribo-Response of Nanostructured Fluid Films for Personal Care Applications

Haugstad G., Avery A., University of Minnesota, US

We present a methodology for interrogating silicone-based polymer-surfactant complex films a few nanometers in thickness. The films include 2D regions of liquid character interspersed in regions of solid character. Images are radically different in a [...]

Direct Observation of the Length of Molecular Cooperativity in Melts of Ultrathin Glass Formers

Overney R.M., Sills S., University of Washington, US

It is our great pleasure to submit this paper, which provides the long awaited microscopic real-space information about the glass transition process in polymers. In the light of the comments made by Nobel Laureate P.W. [...]

Fabrication of Photonic Transfer DNA-Quantum Dot Nanostructures

Heller M.J., Sullivan B., Dehling D., University of California San Diego, US

Fabrication of Photonic Transfer DNA-Quantum Dot Nanostructures M. J. Heller, B. Sullivan and D. Dehling University of California San Diego; Departments of Bioengineering/Electrical and Computer Engineering; PFBE Bldg, Rm 429: La Jolla CA 92093; 858-822-5699; [...]

Self-Assembly and Integration of Ordered, Robust, Three-Dimensional Gold Nanocrystal/Metal Oxide Superlattices

Fan H-Y, Yang K., Gabaldon J.P., Boye D.M., Sigmon T., Malloy K.J., Brinker C.J., Sandia National Laboratories, US

In this presentation, we will report a simple and general method to synthesize ordered, three-dimensional, transparent gold NC/silica superlattices through self-assembly of water-soluble gold NC-micelles and soluble silica under controlled kinetic conditions. NC-micelles were synthesized [...]

Recent Applications of Mesoscale Modeling to Nanotechnology and Drug Delivery

Maiti A., Wescott J., Kung P., Goldbeck-Wood G., Accelrys Inc., US

Technologically important nanomaterials come in all shapes and sizes. They can range from small molecules to complex composites and mixtures. Depending upon the spatial dimensions of the system and properties under investigation, computer modeling of [...]

Control Synthesis of Functional Nanoassemblies using Langmuir-Blodgett Method

Wang H.-L., Tang Z., Gao Y., Magyar R.J., Tretiak S., Shreve A.P., Los Alamos National Laboratory, US

We strive to design syntheses of a series of amphiphilic molecular building blocks that can self-assembled at the air-water interface to form 2D and 3D nanostructures with specific opto-electronic properties. Compression of these molecular building [...]