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however the 3-D structure of the emitter was destroyed at temperatures of around 1800 F (1000 C). To address the problem Braun and his Illinois colleagues coated tungsten emitters in a nanolayer of a ceramic material called hafnium
"The advantage of this core/shell hybrid nanostructure is that the highly porous shell nanolayer provides a very large surface area for redox reactions
"made of nanolayers of ferromagnetic material, superconductor and other metals. By changing the direction of magnetization it is possible to control the current in superconductor.
and his colleagues applied a nanolayer of copper onto one side of a polymer separator creating a novel third electrode halfway between the anode and the cathode.
"The advantage of this core/shell hybrid nanostructure is that the highly porous shell nanolayer provides a very large surface area for redox reactions
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