Scientists have found that two-dimensional nanostructures with asymmetric design enable a new quantum mechanism, triggering the emission of tuneable light at terahertz frequencies-with unprecedented efficiency.
Scientists have discovered how algae that survive in very low levels of light are able to switch on and off a weird quantum phenomenon that occurs during photosynthesis. The function in the algae of this quantum effect, known as coherence, remains a mystery, but it is thought it could help them harvest energy from the sun much more efficiently. Working out its role in a living organism could lead to technological advances, such as better organic solar cells and quantum-based electronic devices.
By combining the advantages of two well-established spectroscopy technologies - 2D-electronic and 2D-infrared - two-dimensional electronic-vibrational spectroscopy (2D-EV) is the first that can be used to simultaneously monitor electronic and molecular dynamics on a femtosecond time-scale. The results show how the coupling of electronic states and nuclear vibrations affect the outcome of photochemical reactions.
Researchers have introduced a new method of detection that allows the entire class of methamphetamine drugs to be detected in water. A probe equipped with synthetic receptor molecules responds to a grouping of atoms that is present in all methamphetamines.
Sandia National Laboratories has come up with an inexpensive way to synthesize titanium-dioxide nanoparticles and is seeking partners who can demonstrate the process at industrial scale for everything from solar cells to light-emitting diodes (LEDs).
Scientists are using a pioneering method of 'caging' and cooling water molecules to study the change in orientation of the magnetic nuclei at the centre of each hydrogen atom - a process which transforms the molecule from one form of water to another.
The European Commission and its non-food Scientific Committee on Emerging and Newly Identified Health Risks, SCENIHR, published the final opinion on 'Nanosilver: safety, health and environmental effects and role in antimicrobial resistance'.