Clint Eastwood is senile and watching him now speaking at the Republican National Convention is the most cringe-inducing moment of being embarrassed and sad for someone else that I've ever experienced. :politics. Graphene Repairs Holes By Knitting Itself Back Together, Say Physicists. The graphene revolution is upon us. If the visionaries are to be believed, the next generation of more or less everything is going to be based on this wonder material–sensors, actuators, transistors and information processors and so on. There seems little that graphene can’t do. But there’s one fly in the ointment. Nobody has yet worked out how to make graphene in large, reliable quantities or how to carve and grow it into the shapes necessary for the next generation of devices. That’s largely because it’s tricky growing anything into a layer only a single atom thick. So a better understanding of the way a graphene sheet interacts with itself and its environment is crucial if physicists are ever going to tame this stuff.
Enter Konstantin Novoselov at the University of Manchester and a few pals who have spent more than a few hours staring at graphene sheets through an electron microscope to see how it behaves. Today, these guys say they’ve discovered why graphene appears so unpredictable. From lemons to lemonade: Reaction uses carbon dioxide to make carbon-based semiconductor. (Phys.org) -- A materials scientist at Michigan Technological University has discovered a chemical reaction that not only eats up the greenhouse gas carbon dioxide, it also creates something useful.
And, by the way, it releases energy. Making carbon-based products from CO2 is nothing new, but carbon dioxide molecules are so stable that those reactions usually take up a lot of energy. If that energy were to come from fossil fuels, over time the chemical reactions would ultimately result in more carbon dioxide entering the atmosphere—defeating the purpose of a process that could otherwise help mitigate climate change. Professor Yun Hang Hu’s research team developed a heat-releasing reaction between carbon dioxide and Li3N that forms two chemicals: amorphous carbon nitride (C3N4), a semiconductor; and lithium cyanamide (Li2CN2), a precursor to fertilizers. “The reaction converts CO2 to a solid material,” said Hu. And how much energy does it release? "The Cure heeft miljoenen laten liggen door aan principes vast te houden" Nick Hanauer TED Presentation About Why Rich People Aren't Job Creators.
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