Papers:
Controlling the Photoactivity of Nanoparticles
The relative photoactivity of a series of nanophase ZnO powders with varying crystallite size (20-140nm) was determined using a chemical method based on the photobleaching behaviour of the stable radical 1,1-diphenyl-2-picrylhydrazyl (DPPH). It was confirmed [...]
Phase Morphology Control in Electrospun Nanofibers From Polymer Blends
Nanofibers of polybutadiene/polycarbonate blends were electrospun from polymer solutions. The effect of composition on the resulting internal morphology of the nanofibers was studied using Transmission Electron Microscopy (TEM). When the composition ratio of PB/PC blends [...]
Conjugation of DNA to Streptavidin-coated Quantum Dots for the Real-time Imaging of Gene Transfer into Live Cells
Kim J.K., Lim S.H., Lee Y., Shin Y.S., Chung C., Yoo J.Y., Chang J.K., Digital Bio Technology, Co, KR
We have developed the method for the conjugation of biotinylated DNA to streptavidin-coated quantum dots (QDs). QD-DNA conjugates and a highly sensitive fluorescence imaging technique are adopted to visualize gene transport across the membrane of [...]
Adsorption of PTDCA on Si(100) and Si(100)-H
Soubiron T., Vaurette F., Grandidier B., Wallart X., Nys J.P., Stiévenard D., IEMN (UMR8520, CNRS), Dpt ISEN, FR
Submonolayer coverages of perylene-tetracarboxylic-dianhydride (PTCDA) molecules have been investigated with scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS). At high coverage, X-ray measurements indicate that only a fraction of the molecules are chemisorbed and [...]
Nanoparticle Dispersions for Polishing Applications
Increasingly, improvements in surface roughness and planarity are being sought in a variety of technologically advanced polishing applications related to the electronics industry. From the production of photomask blanks to the fabrication of microelectronic memory [...]
Growth Kinetics of Gold Nanoparticles in Reverse Micelles
Herrera A.P., Vicuña E., Rinaldi C., Castro M.E., Irizarry R., Briano J.G., University of Puerto Rico, US
Gold nanoparticles were formed from the reduction of gold (III) in reverse micelles and monitored with a stopped flow analyzer. The gold and the reducing agent micelles were formed in isooctane and AOT (as surfactant). [...]
Finite-Size Effects and Surface-Enhanced Raman Scattering from Molecules Adsorbed on Noble-Metal Nanoparticles
We study theoretically the role of strong electron confinement on surface-enhanced Raman scattering (SERS) from molecules adsorbed on metal nanoparticles. We describe a novel enhancement mechanism, relevant for nanometer-sized noble-metal particles, which originates from different [...]
Nanoscaled Science and Engineering for Sensing : Quantum Dots Fluorescence Quenching for Organic NO2 Sensing
Nieto S., Santana A., Delgado R., Hernandez S.P., Chamberlain R.T., Lareau R., Castro M.E., The University of Puerto Rico Chemical Imaging Center, US
We report on femtosecond laser off-resonance excitation of quantum dots-TNT assemblies in solution. The fluorescence emission from quantum dots shifts toward lower wavelengths and the relative peak intensity decreases with the amount of TNT added [...]
Desorption of Surfactant and Sintering of Surface Modified PdxNi1-x Nanoparticles
A series of PdxNi1-x nanoparticles in a diameter of 10 nm were prepared by wet chemical reduction. The surface was modified with 1 wt% stearic acid (SA) or polyethylene glycol (PEG). Desorption of the surfactant [...]
Effect of Various Fuel Conditions on the Synthesis of Nano Crystalline LiNiVO4 Powders for Lithium Battery Applications
Inverse spinel LiNiVO4 has been used as a cathode material for high voltage lithium battery applications. Better performance of the cathode material is due to its physical and chemical properties, which are mainly depending on [...]
Journal: TechConnect Briefs
Volume: 3, Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 3
Published: March 7, 2004
Industry sector: Advanced Materials & Manufacturing
Topic: Nanoparticle Synthesis & Applications
ISBN: 0-9728422-9-2