Call it the anti-sunscreen. That's more or less the description of what many solar energy researchers would like to find - light-catching substances that could be added to photovoltaic materials in order to convert more of the sun's energy into carbon-free electricity.
Scientists at the University of Toronto in Canada have shown that inexpensive nickel can work just as well as gold for one of the critical electrical contacts that gather the electrical current produced by their colloidal quantum dot solar cells.
Researchers from the Max Planck Institute of Biophysics in Frankfurt, and Mount Sinai School of Medicine in New York have provided the first atomic-level glimpse of the proton-driven motor from a major group of ATP synthases, enzymes that are central to cellular energy conversion.
Team led by Pitt physics and astronomy professor Jeremy Levy to resolve the major challenges to creating computers more powerful and efficient than all the world's existing computers with five-year US Department of Defense MURI award.
Physicists recently developed a new theoretical model to explain how the Pauli exclusion principle can be violated and how, under certain rare conditions, more than one electron can simultaneously occupy the same quantum state.
Cancer and engineering scientists at The Ohio State University are collaborating to create molecule-sized nanofibers to mimic the structure of white matter in the brain. By combining nanotechnology with a medically-approved polymer, researchers are able to study the invasive behavior of tumor cells.
Ecological scientists will discuss findings on human-ecosystem interactions - from the effects of nanomaterials on plant growth to the diversity of insect species on green roofs, and even communities of airborne microbes in hospital buildings - at the Ecological Society of America's 95th Annual Meeting in Pittsburgh from August 1-6, 2010.
Alle Elektronen tragen ein magnetisches Moment, Spin genannt, das grundsaetzlich in zwei Richtungen zeigen kann. Setzt man geeignete Nano-Roehrchen aus Kohlenstoff einem hohen Magnetfeld aus, so lassen sie bei einem bestimmten Wert nur Elektronen mit einer Spinrichtung durchfliessen. Erhoeht man das Magnetfeld weiter, so werden nur Elektronen mit der anderen Spinrichtung durchgelassen.
Tiny particles of iron oxide could become tools for simultaneous tumor imaging and treatment, because of their magnetic properties and toxic effects against brain cancer cells. In mice, researchers have demonstrated how these particles can deliver antibodies to implanted brain tumors, while enhancing tumor visibility via magnetic resonance imaging (MRI).
An innovation that can help scientists observe a reaction moving at greater than 10 meters per second, with a few nanometers spatial resolution, is a feat some would say is nearly impossible. But not the Lawrence Livermore team of scientists who developed the dynamic transmission electron microscope (DTEM).