Scientists have made the first observation of the electronic structure in silver-rhodium (Ag-Rh) alloy nanoparticles to investigate why the alloy possesses a hydrogen absorbing/storage property like palladium does, given that bulk Ag and Rh do not form an alloy, and that neither element alone is a hydrogen absorbing/storage metal.
New device screens for kidney disease, prostate cancer on the spot. The tiny tube is lined with DNA sequences that latch onto disease markers in urine. While healthy samples flow freely, a diseased sample gets clogged and stops short of the mark.
Scientists have succeeded in simultaneously observing the reorganizations of atomic positions and electron distribution during the transformation of the 'smart material' vanadium dioxide from a semiconductor into a metal - in a timeframe a trillion times faster than the blink of an eye. This marks the first time experiments have been able to distinguish changes in a material's atomic-lattice structure from the relocation of the electrons in such a blazingly fast process.
You don't always need GPS, a map or a compass to find the right way. What demands a tremendous amount of computational power from today's navigation computers can also be achieved by taking advantage of the laws of physical chemistry and practicing so-called 'chemical computing'.
The trend toward energy self-sufficient probes and ever smaller mobile electronics systems continues unabated. They are used, for example, to monitor the status of the engines on airplanes, or for medical implants. They gather the energy they need for this from their immediate environment - from vibrations, for instance. Researchers have developed a process for the economical production of piezoelectric materials.
In less than a minute, a miniature device can measure a patient's blood for methotrexate, a commonly used but potentially toxic cancer drug. Just as accurate and ten times less expensive than equipment currently used in hospitals.
Researchers report reproducible and quantitative measurements of electricity flow through long molecules made of four DNA strands, signaling a significant breakthrough towards the development of DNA-based electrical circuits.
Scientists will receive about $1.25 million from the Center for the Advancement of Science in Space to develop an implantable device that delivers therapeutic drugs at a rate guided by remote control. The device's effectiveness will be tested aboard the International Space Station and on Earth's surface.