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Latest Colloidal gold Stories

'BRIGHTS' Reveal Location Of Targeted Tissues
2012-11-21 10:41:38

Washington University in St. Louis Called BRIGHTs, the tiny probes described in the online issue of Advanced Materials on Nov. 15, bind to biomarkers of disease and, when swept by an infrared laser, light up to reveal their location. Tiny as they are, the probes are exquisitely engineered objects: gold nanoparticles covered with molecules called Raman reporters, in turn covered by a thin shell of gold that spontaneously forms a dodecahedron. The Raman reporters are molecules whose...

DNA Code Shapes Gold Nanoparticles
2012-08-08 16:01:32

DNA holds the genetic code for all sorts of biological molecules and traits. But University of Illinois researchers have found that DNA´s code can similarly shape metallic structures. The team found that DNA segments can direct the shape of gold nanoparticles — tiny gold crystals that have many applications in medicine, electronics and catalysis. Led by Yi Lu, the Schenck Professor of Chemistry at the U. of I., the team published its surprising findings in the journal Angewandte...

2012-07-13 10:52:32

Rice University researchers find repeating patterns dictate optical properties of nanoparticle arrays New research at Rice University that seeks to establish points of reference between plasmonic particles and polymers might lead to smaller computer chips, better antennae and improvements in optical computing. Materials scientists take advantage of strong interactions between chemicals to form polymers that self-assemble into patterns and are the basis of things people use every day....

2012-04-09 09:46:25

Rice teams with MD Anderson, Baylor College of Medicine to explore drug and gene delivery Using light-harvesting nanoparticles to convert laser energy into “plasmonic nanobubbles,” researchers at Rice University, the University of Texas MD Anderson Cancer Center and Baylor College of Medicine (BCM) are developing new methods to inject drugs and genetic payloads directly into cancer cells. In tests on drug-resistant cancer cells, the researchers found that delivering...

2012-03-28 17:24:55

Rice University lab develops starfruit-shaped nanorods for medical imaging, chemical sensing They look like fruit, and indeed the nanoscale stars of new research at Rice University have tasty implications for medical imaging and chemical sensing. Starfruit-shaped gold nanorods synthesized by chemist Eugene Zubarev and Leonid Vigderman, a graduate student in his lab at Rice´s BioScience Research Collaborative, could nourish applications that rely on surface-enhanced Raman...

2012-03-28 09:07:45

Take an ounce of lettuce, test it for 17 hours, and the results show whether that mainstay ingredient in green salads is contaminated with Salmonella, the food poisoning bacteria that sickens millions of people each year. Another traditional test takes 72 hours to complete. How about a test that identifies Salmonella in five minutes, so that shipments of lettuce can be confiscated before they reach the table? Scientists today described development and successful testing of just such a test...

2012-03-12 14:40:58

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. Advances in fuel-cell technology have been stymied by the inadequacy of metals studied as catalysts....

2012-02-21 23:10:56

Discovery is designed to allow inexpensive detection of poisonous industrial gases by workers wearing small sensor chips filled with gold nanowires Researchers at the University of Pittsburgh have coaxed gold into nanowires as a way of creating an inexpensive material for detecting poisonous gases found in natural gas. Along with colleagues at the National Energy Technology Laboratory (NETL), Alexander Star, associate professor of chemistry in Pitt's Kenneth P. Dietrich School of Arts and...

Bright Lights Of Purity
2012-01-31 04:43:01

Berkeley Lab Researchers Discover Why Pure Quantum Dots and Nanorods Shine Brighter To the lengthy list of serendipitous discoveries — gravity, penicillin, the New World — add this: Scientists with the U.S. Department of Energy (DOE)´s Lawrence Berkeley National Laboratory (Berkeley Lab) have discovered why a promising technique for making quantum dots and nanorods has so far been a disappointment. Better still, they´ve also discovered how to correct the problem. A...


Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
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