When the dry lubricant, molybdenum disulfide, is stripped down to a single layer of atoms, a tightly bound quasi-particle comprised of two electrons and a hole forms with unique spin and valley properties.
With their ultra short X-ray flashes, free-electron lasers offer the opportunity to film atoms in motion in complicated molecules and in the course of chemical reactions. However, for monitoring this motion, the arrival time and the temporal profile of the pulses which periodically illuminate the system, must be precisely known. An international team of scientists has now developed a measurement technique that provides complete temporal characterization of individual FEL (free-electron laser) pulses.
Harnessing laser light's ability to gently push and pull microscopic particles, researchers have created the fiber-optic equivalent of the world's smallest wrench. This virtual tool can precisely twist and turn the tiniest of particles, from living cells and DNA to microscopic motors and dynamos used in biological and physical research.
The search for clean and green energy in the 21st century requires a better and more efficient battery technology. The key to attaining that goal may lie in designing and building batteries not from the top down, but from the bottom up - beginning at the nanoscale.
The bizarre world of quantum mechanics might not seem a likely place from which to find answers to biological questions, but increasing numbers of scientists are turning to it to better explain the living world.
Researchers at Rice University have found a way to kill some diseased cells and treat others in the same sample at the same time. The process activated by a pulse of laser light leaves neighboring healthy cells untouched.
Chemiker der Universität Basel haben winzige Nanokugeln entwickelt, die das häufig eingesetzte Antibiotikum Cephalexin herstellen und lokal freisetzen können. Wenn es gelingt, solche Nanoreaktoren in medizinische Implantate einzubauen, liessen sich gezielt bakterielle Infektionen bekämpfen, ohne dass der Wirkstoff über den ganzen Körper verteilt wird.
Say goodbye to that annoying buzz created by overhead fluorescent light bulbs in your office. Scientists at Wake Forest University have developed a flicker-free, shatterproof alternative for large-scale lighting.
Researchers of the Max-Born-Institute at Berlin, Germany, have observed how biomolecules transfer energy into extremely small water droplets in their environment. A water shell consisting of only 3 water molecules around a phospholipid molecule is sufficient for energy transfer within 1 ps.
Dr. Yuntian T. Zhu, Distinguished Professor of Materials Science and Engineering at North Carolina State University, has been named a Fellow of the American Association for the Advancement of Science (AAAS).