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Nick Carroll, assistant professor in the Department of Chemical and Biological Engineering at The University of New Mexico, was awarded a National Science Foundation CAREER Award for a project that could eventually lead to smart implantable medical devices and other biomedical and technological advances. Carroll’s research which focuses on genetically-engineered biomaterials created by the interplay of biology and polymer physics seeks to develop synthetic cell populations that can “talk” to each other and transmit information, much like the electrical impulses that send commands to a computer or a phone. Instead, here proteins are passed cell to cell, sending instruction through molecules to synchronize cooperative activity in what is known as “quorum behavior.” ....
Chinese researchers created a yolk-shell system with an iron-supporting carbon shell that envelops a palladium-supporting metal–organic framework Chinese chemists have hatched yolk-shell nanostructures that they say are the first to integrate different metals as single atom catalysts to achieve a tandem synthesis. ‘Our design concept is an important step to simulating enzyme catalysis or activation of inert chemical bonds,’ says Yuen Wu from the University of Science and Technology of China in Hefei. In the nanostructure’s inner yolk layer, Wu and colleagues embed single palladium atoms on a metal organic framework (MOF). In its outer layer, they embed iron in a nitrogen-doped carbon shell. Under electrolysis, the catalysts couple alkenes and nitroaromatic compounds, after iron atoms and oxygen epoxidise the former and palladium atoms and hydrogen reduce the latter. They have developed eight catalysts, the main one having an equal ratio of iron to palladium. ....