Specially tailored, ultrafast pulses of light can trigger neurons to fire and could one day help patients with light-sensitive circadian or mood problems, according to a new study in mice at the University of Illinois. This study is the first demonstration of using coherent control to regulate function in a living cell.
A Japanese research team at Kyushu University synthesized a compound that absorbs near-infrared light to produce hydrogen from water. The compound contains three ruthenium atoms connected by an organic molecule. The absorbed light stimulates electrons to 'jump' into orbitals that do not exist in other, similar compounds. This is the first successful use of infrared light to reduce water into hydrogen, which can be used for energy conversion and storage, and other industrial purposes in a future sustainable energy society.
The Ohio State University researchers, with scientists at Wright State University and Naval Research Laboratory, describe a promising new semiconductor LED made with GaN-based materials that could boost wallsocket efficiency by reducing energy losses and self-heating. If this new technology can be harnessed for large light output, the breakthrough could enhance LED solid state lighting without a significant change to the existing LED manufacturing facility.
Called Ultrasound Bioprobe, the non-invasive approach developed at Northwestern University allows researchers to view sub-cellular structures and their mechanical behavior at nanoscale resolution.
Red-sensitive, blue-sensitive and green-sensitive colour sensors stacked on top of each other instead of being lined up in a mosaic pattern -- this principle could allow image sensors with unprecedented resolution and sensitivity to light to be created. However, up to now, the reality hasn't quite met expectations. Researchers from Empa and ETH Zurich have now developed a sensor prototype that absorbs light almost optimally -- and which is also cheap to produce.
In recent years, optics and photonics, and in particular the microspectroscopic techniques, have demonstrated their effectiveness for the materials analysis. The work 'Non-contact mechanical and chemical analysis of single living cells by micro-spectroscopic techniques' which will appear in the journal Nature-Light: Science & Applications (LSA), introduces the use of a new spectrometer capable of analysing living cells in situ, in non-invasive manner and with sub-micrometric spatial resolution.
Security features are to protect bank notes, documents, and branded products against counterfeiting. Losses caused by product forgery and counterfeiting may be enormous. According to the German Engineering Association, the damage caused in 2016 in its branch alone amounted to EUR 7.3 billion. In the Advanced Materials Technologies journal, researchers of Karlsruhe Institute of Technology (KIT) and the ZEISS company now propose to use printed 3-D microstructures instead of 2-D structures, such as holograms, to improve counterfeit protection.
Modern solar cells, which use energy from light to generate electrons and holes that are then transported out of semiconducting materials, have existed for over 60 years. Little attention has been paid, however, to the promise of using light to drive the transport of oppositely charged protons and hydroxides obtained by dissociating water molecules. Researchers report such a design, which has promising application in producing electricity to turn brackish water drinkable, Nov. 15 in Joule.
A new immersive virtual reality (VR) experience now offers a unique way to visualize and interact with large volumes of 3-D anatomical brain data. The system, developed by researchers from the Wyss Center for Bio and Neuroengineering and the University of Geneva, has applications in neurotechnology development, research and surgeon training. A poster describing the system will be presented on Wednesday, Nov. 15, at the annual meeting of the Society for Neuroscience 2017, in Washington D.C.
Sunlight reflected by solar cells is lost as unused energy. The wings of the butterfly Pachliopta aristolochiae are drilled by nanostructures (nanoholes) that help absorbing light over a wide spectrum far better than smooth surfaces. Researchers of Karlsruhe Institute of Technology (KIT) have now succeeded in transferring these nanostructures to solar cells and, thus, enhancing their light absorption rate by up to 200 percent. The scientists report their results in the journal Science Advances.