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Latest Colloidal gold Stories

2011-12-09 16:38:45

Carnegie Mellon University's Roberto R. Gil and Rongchao Jin have successfully used NMR to analyze the structure of infinitesimal gold nanoparticles, which could advance the development and use of the tiny particles in drug development. Their approach offers a significant advantage over routine methods for analyzing gold nanoparticles because it can determine whether the nanoparticles exist in a both right-handed and left-handed configuration, a phenomenon called chirality. Determining a...

2011-10-13 20:56:57

Design rules will enable scientists to use DNA to build nanomaterials with desired properties Nature is a master builder. Using a bottom-up approach, nature takes tiny atoms and, through chemical bonding, makes crystalline materials, like diamonds, silicon and even table salt. In all of them, the properties of the crystals depend upon the type and arrangement of atoms within the crystalline lattice. Now, a team of Northwestern University scientists has learned how to top nature by...

2011-10-11 13:49:34

Nanoparticles of a substance can be counted and the size distribution can be determined by dispersing the nanoparticles into a gas. But some nanoparticles tend to aggregate when the surrounding conditions change. Scientists at the University of Gothenburg, Sweden, have shown that it is possible to sort and count the particles, even when they have formed aggregates. "Nanoparticles are already used in many everyday products, such as sunscreen and cosmetics. It is important to be able to...

New Technique Maps Twin Faces Of Smallest Janus Nanoparticles
2011-09-27 09:31:36

New drug delivery systems, solar cells, industrial catalysts and video displays are among the potential applications of special particles that possess two chemically distinct sides. These particles are named after the two-faced Roman god Janus and their twin chemical faces allow them to form novel structures and new materials. However, as scientists have reduced the size of Janus particles down to a few nanometers in diameter — about the size of individual proteins, which has the...

2011-07-07 19:25:41

Scientists at the University of Southampton have developed smart nanomaterials, which can disrupt the blood supply to cancerous tumors. The team of researchers, led by Physics lecturer Dr Antonios Kanaras, showed that a small dose of gold nanoparticles can activate or inhibit genes that are involved in angiogenesis - a complex process responsible for the supply of oxygen and nutrients to most types of cancer. "The peptide-functionalized gold nanoparticles that we synthesized are very...

2011-06-22 22:28:41

Hepatocellular carcinoma is the most common cancer to strike the liver. More than 500,000 people worldwide, concentrated in sub-Saharan Africa and Southeast Asia, are diagnosed with it yearly. Most of those afflicted die within six months. A big obstacle to treatment of liver cancer is the lack of early diagnosis. Current techniques, including ultrasound, CT and MRI scans, spot tumors only when they have grown to about 5 centimeters in diameter. By that time, the cancer is especially...

2011-03-16 06:45:00

SYRACUSE, N.Y., March 16, 2011 /PRNewswire/ -- Scientists in Syracuse University's Chemistry Department have created a new drug delivery system expected to advance the effectiveness of cancer-killing drugs. It uses gold nanoparticles with attached DNA that binds to a proven anti-cancer drug, Doxorubicin or DOX. Preliminary tests indicate this delivery device has the potential to significantly improve the results of cancer chemotherapy. DOX is currently used against cancers of the breast,...

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2011-02-28 10:22:31

Nanometer-scale gold particles are currently intensively investigated for possible applications in catalysis, sensing, photonics, biolabeling, drug carriers and molecular electronics Nanometer-scale gold particles are currently intensively investigated for possible applications in catalysis, sensing, photonics, biolabeling, drug carriers and molecular electronics. The particles are prepared in a solution from gold salts and their reactive gold cores can be stabilized with various organic...

2011-02-07 13:37:31

Researchers at Case Western Reserve University have developed a little bomb that promises a big bang for cancer patients. Preliminary tests show an anti-cancer drug loosely attached to gold nanoparticles starts accumulating deep inside tumors within minutes of injection and can be activated for an effective treatment within two hours. The same drug injected alone takes two days to gather and attacks the tumor from the surface "“ a far less effective route. The work, titled "Deep...

2011-01-28 00:01:04

Scientists have created a diamond-like lattice composed of gold nanoparticles and viral particles, woven together and held in place by strands of DNA. The structure "“ a distinctive mix of hard, metallic nanoparticles and organic viral pieces known as capsids, linked by the very stuff of life, DNA "“ marks a remarkable step in scientists' ability to combine an assortment of materials to create infinitesimal devices. The research, done by scientists at the University of Rochester...


Word of the Day
tessitura
  • The prevailing range of a vocal or instrumental part, within which most of the tones lie.
This word is Italian in origin and comes from the Latin 'textura,' web, structure.