Figure 5From: Tube Formation in Nanoscale MaterialsIllustration of porous CuO nanotubes via a thermal oxidation process.a CuSe nanowires as the starting precursor.b Formation of CuO at the shell of CuSe in the thermal oxidation process.c Continual growth of CuO from CuSe, which involves a non-equilibrium interdiffusion, volume loss, and release of internally born gas, and eventual formation of porous CuO nanotubes.d SEM image of CuSe nanowires precursor.e SEM image of porous CuO nanotube using as-prepared CuSe nanowire as the precursorBack to article page