Renaissance architects demonstrated their understanding of geometry and physics when they built whispering galleries into their cathedrals. These circular chambers were designed to amplify and direct sound waves so that, when standing in the right spot, a whisper could be heard from across the room. Now, scientists at the University of Pennsylvania have applied the same principle on the nanoscale to drastically reduce emission lifetime, a key property of semiconductors, which can lead to the development of new ultrafast photonic devices.
University of Wisconsin-Madison materials science and engineering researchers have introduced innovations that could make possible a wide range of new crystalline materials. They describe a new approach for using thin sheets of semiconductor known as nanomembranes.
The annual Commercialization of Micro-Nano Systems Conference (COMS 2011) being held Aug 28-31 in Greensboro, is again shaping up to be a who's who of the micro-nano technology (MNT) community, bringing together leaders in North Carolina with those from around the globe.
Modified metals that change colour in the presence of particular gases could warn consumers if packaged food has been exposed to air or if there's a carbon monoxide leak at home. This finding could potentially influence the production of both industrial and commercial air quality sensors.
Among many potential applications, carbon nanotubes are great candidate materials for cleaning polluted water. Many water pollutants have very high affinity for carbon nanotubes and pollutants could be removed from contaminated water by filters made of this nanomaterial, for example water soluble drugs which can hardly be separated from water by activated carbon.
Stephanie Meyer, a physicist specializing in optics, is bringing new capabilities to the University of Colorado Denver Anschutz Medical Campus by building an advanced, super resolution microscope able to see some of the innermost workings of the cell.
Super strong nanometals are beginning to play an important role in making cars even lighter, enabling them to stand collisions without fatal consequences for the passengers. A PhD student at Riso DTU has discovered a new phenomenon that will make nanometals more useful in practice.
Neben vielen anderen Anwendungsmoeglichkeiten koennen Nanoroehren zur Reinigung von kontaminiertem Wasser eingesetzt werden. Viele wasserverunreinigende Stoffe haben eine hohe Affinitaet fuer Kohlenstoffnanoroehren. Deshalb koennen Schadstoffe aus kontaminiertem Wasser entfernt werden, indem sie durch dieses Material gefiltert werden.
A University at Buffalo-led research team has developed a mathematical framework that could one day form the basis of technologies that turn road vibrations, airport runway noise and other "junk" energy into useful power. The concept all begins with a granular system comprising a chain of equal-sized particles -- spheres, for instance -- that touch one another.
Using high-magnetic fields, Susumu Takahashi, assistant professor at the University of Southern California, and his colleagues managed to suppress decoherence, one of the key stumbling blocks in quantum computing.
Scientists are reporting a key advance toward the long-awaited era of "single-molecule electronics," when common electronic circuits in computers, smart phones, audio players, and other devices may shrink to the size of a grain of sand.
Conventional diagnostic tools often cannot detect many cancers, Alzheimer's and other life-threatening diseases early enough to provide effective treatment. But nanotechnology, which is revolutionizing electronics and other fields, promises to similarly transform medicine, particularly when it comes to identifying illnesses more quickly.