Engineering researchers have achieved the highest efficiency ever in a 9 millimeter-squared solar cell made of gallium arsenide. After coating the cufflink-sized cells with a thin layer of zinc oxide, the research team reached a conversion efficiency of 14 percent.
It's a familiar trope in science fiction: In enemy territory, activate your cloaking device. And real-world viruses use similar tactics to make themselves invisible to the immune system. Now scientists have mimicked these viral tactics to build the first DNA nanodevices that survive the body's immune defenses.
A bullet fired through a block of wood will slow down. In a similar way, ions are decelerated when they pass through a solid material: the thicker the material, the larger the energy loss will be. However, this picture breaks down in ultra-thin target materials, which only consist of a few layers of atoms.
Researchers have synthesized a new class of macromolecules that self-assemble into various ordered structures with feature sizes smaller than 10 nanometers. Called 'giant surfactants', these large molecules mimic the structural features of small surfactants but have been transformed into functional molecular nanoparticles by being 'clicked' with polymer chains. The resulting materials are unique because they bridge the gap between small molecule surfactants and traditional block copolymers and thus possess an interesting duality in their self-assembly behaviors.
Researchers at UT Dallas recently received a $459,000, three-year grant from the National Institute of Environmental Health Sciences, part of the National Institutes of Health, to track how multi-walled carbon nanotubes interact with human cells.
Using nanodot technology, Berkeley Lab researchers have demonstrated the first size-based form of chromatography that can be used to study the membranes of living cells. This unique physical approach to probing cellular membrane structures can reveal information critical to whether a cell lives or dies, remains normal or turns cancerous, that can't be obtained through conventional microscopy.
Researchers in AMBER, the Science Foundation Ireland funded materials science centre headquartered at Trinity College Dublin have, for the first time, developed a new method of producing industrial quantities of high quality graphene.
New research finds that impurities can hurt performance - or possibly provide benefits - in a key superconductive material that is expected to find use in a host of applications, including future particle colliders. The size of the impurities determines whether they help or hinder the material's performance.
A significant breakthrough could revolutionize surgical practice and regenerative medicine. A team of researchers has just demonstrated that the principle of adhesion by aqueous solutions of nanoparticles can be used in vivo to repair soft-tissue organs and tissues.