W Tungsten

Cable-to-tube transition: Core–shell sulfide–carbon nanocables have been oxidised to hollow polycrystalline nanowires and further assembled to crystallites inside a transmission electron microscope. The full experimental life cycle (see graphic) was followed for a single nanostructure; this provided extended structural and chemical information that supports a nanocable-to-nanotube transition and the presence of the Kirkendall effect.