New technique builds super-hard metals from nanoparticles

Metallurgists have all kinds of ways to make a chunk of metal harder. They can bend it, twist it, run it between two rollers or pound it with a hammer. These methods work by breaking up the metal's grain structure—the microscopic ...

Hollow porphyrinic nanospheres

Famous Catalan architect Antoni Gaudí once said, "Anything created by human beings is already in the great book of nature." Among different man-made architectures and art, spherical structures and shapes have been the most ...

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