Latest Colloidal gold Stories
Nanoparticles are being developed to perform a wide range of medical uses -- imaging tumors, carrying drugs, delivering pulses of heat. Rather than settling for just one of these, researchers at the University of Washington have combined two nanoparticles in one tiny package.The result is the first structure that creates a multipurpose nanotechnology tool for medical imaging and therapy. The structure is described in a paper published online this week in the journal Nature...
At a technical breakfast, Romain Quidant presented his research into the detection and treatment of cancer using gold nanoparticles illuminated with laser light. Quidant, who was recently awarded the Fresnel Prize 2009 that recognizes the highest level of excellence amongst emerging researchers in the field of photonics, is an ICREA researcher at the UPC's Institute of Photonic Sciences (ICFO) and a fellow of the Cellex Foundation Barcelona."Drops" of gold that burn tumorsQuidant is among the...
Researchers are describing a long-awaited advance toward applying the marvels of nanotechnology in the battle against cancer. They have developed the first hollow gold nanospheres "” smaller than the finest flecks of dust "” that search out and "cook" cancer cells. The cancer-destroying nanospheres show particular promise as a minimally invasive future treatment for malignant melanoma, the most serious form of skin cancer, the researchers say. Melanoma now causes more than 8,000...
Researchers found a more accurate way to deliver cancer drugs, by harnessing the power of gold nanoparticles. They wrote in the journal ACS Nano that the system could release a number of drugs in a specific part of the body at desired times. The device relies on the fact that different particles melt when exposed to different levels of infrared light. Therefore, different drugs on the particles could be released in a controlled way. Researchers say delivering drugs directly to a specific site...
Using tiny gold particles and infrared light, MIT researchers have developed a drug-delivery system that allows multiple drugs to be released in a controlled fashion.Such a system could one day be used to provide more control when battling diseases commonly treated with more than one drug, according to the researchers."With a lot of diseases, especially cancer and AIDS, you get a synergistic effect with more than one drug," said Kimberly Hamad-Schifferli, assistant professor of...
U.S. scientists say they have developed a method that makes and patterns nanoscale wires and other devices now made with expensive lithographic tools. "You can, in principle, build almost any types of architectures you want at nanoscale," said Cornell University Associate Professor Dan Luo and postdoctoral researcher Wenlong Cheng. They said they began with gold nanoparticles about 12 nanometers in diameter suspended in water. To suspend metal particles in water, the researchers coated them...
By Valenzuela, Stella Cortie, Michael Gold nanoparticles can target and kill the parasite Toxoplasma gondii, opening the way for a new treatment for parasitic infections in humans. Over the ages, people worldwide have revered gold as a precious metal, with its uses being many and varied. In cultures where the Sun was worshiped as a deity, gold was viewed as its representative form on Earth. It has also commonly been used for decorative purposes in art, food and jewellery. Other uses include...
Nanoparticles of gold too small to be seen with the naked eye have been created in laboratories, but up until now, have never been seen in nature.The search for these natural but "˜invisible' nanoparticles is important. If they can be proved to exist, the knowledge will help give us a deeper understanding of how gold can be transported and deposited by geological processes, and therefore help explorers to find new gold deposits in Australia.Now, hard evidence that gold nanoparticles have...
By Jain, Kewal K Background: Nanobiotechnologies are being applied to molecular diagnostics and several technologies are in development. Methods: This review describes nanobiotechnologies that are already incorporated in molecular diagnostics or have potential applications in clinical diagnosis. Selected promising technologies from published literature as well as some technologies that are in commercial development but have not been reported are included. Results: Nanotechnologies enable...
By Xiao, Yabing Ling, Jie; Qian, Shahua; Lin, Anqing; Et al ABSTRACT: A novel method of preconcentration of trace arsenite and arsenate by using titanium dioxide nanoparticles as adsorbent was described. The concentrations of preconcentrated arsenite and arsenate were determined by a silver diethyldithiocarbamate spectrophotometric method without desorption. Batch adsorption experiments were carried out as a function of the pH, contact time, amount of titanium dioxide nanoparticles, and...
