Dynamic State and Active Structure of Ni–Co Catalyst in Carbon Nanofiber Growth Revealed by in Situ Transmission Electron Microscopy Climate Skills Posted on November 3, 2021 ← Thermally propagated Al contacts on SiGe nanowires characterized by electron beam induced current in a scanning transmission electron microscope Temperature-dependent selective nucleation of single-walled carbon nanotubes from stabilized catalyst nanoparticles →