Tungsten is another strategically vital metal whose production is dominated by China. The U.S. does not produce it, but South ...

carbon nanotubes can be either conducting or semiconducting depending on whether there is a “twist” left in the tube structure when a nanosheet is rolled up. On the other hand, tungsten ...

Carbon nanotubes, for example, can be conducting or semiconducting depending on whether a “twist” remains in the tube structure after a nanosheet is rolled up. On the other hand, tungsten ...