gold atom – Shamskm: A site to exchange knowledge and solutions

New Technique Lets Scientists Peer Within Nanoparticles, See Atomic Structure in 3-D

By Guest PostMarch 23, 2012Science3 d, atom, atomic scale resolution, atomic structure, chien chun chen, chris regan, chun zhu, conundrum, electronic property, gold atom, gold nanoparticle, gold particle, high energy electron, honeycomb, image, jianwei john miao, mary scott, material, matthew mecklenburg, microscope, nanomaterial, nanometer, nanostructure, peter ercius, radiation, rui xu, three dimensions, ucla, ulrich dahmen, x ray crystallography

UCLA researchers are now able to peer deep within the world’s tiniest structures to create three-dimensional images of individual atoms and their positions. Their research, published March 22 in the journal Nature, presents a new method for directly measuring the atomic structure of nanomaterials.

“This is the first experiment where we can directly see local structures in three dimensions at atomic-scale resolution — that’s never been done before,” said Jianwei (John) Miao, a professor of physics and astronomy and a researcher with the California NanoSystems Institute (CNSI) at UCLA. (more…)

Touch of Gold Improves Nanoparticle Fuel-Cell Reactions

By Guest PostMarch 13, 2012Scienceadvanced electron microscopy, brown university, carbon monoxide, catalyst, co, crystal structure, crystallization, feptau, formic acid, fuel cell reaction, gold, gold atom, helmets, huiyuan zhu, japanese firefighters, mass activity, metallic nanoparticle, nanoparticle catalyst, np, organic material, oxidation, palladium, sen zhang, shaojun guo, shouheng sun, tetragonal, trimetallic nanoparticle

Chemists at Brown University have created a triple-headed metallic nanoparticle that reportedly performs better and lasts longer than any other nanoparticle catalyst studied in fuel-cell reactions. The key is the addition of gold: It yields a more uniform crystal structure while removing carbon monoxide from the reaction. Results published in the Journal of the American Chemical Society.

PROVIDENCE, R.I. [Brown University] — Advances in fuel-cell technology have been stymied by the inadequacy of metals studied as catalysts. The drawback to platinum, other than cost, is that it absorbs carbon monoxide in reactions involving fuel cells powered by organic materials like formic acid. A more recently tested metal, palladium, breaks down over time. (more…)

Tag Archives: gold atom

New Technique Lets Scientists Peer Within Nanoparticles, See Atomic Structure in 3-D

Touch of Gold Improves Nanoparticle Fuel-Cell Reactions