Figure 2

TEM images of silica nanostructures obtained at 1,000°C. (a) TEM image of part of ultra-long rope-like nanowire assemblies. (b) TEM image of rope-like nanowire assemblies with the catalyst at the tip. (c) TEM image of enlarged stem view of the rope-like nanowire assemblies. (d) TEM image of several feather-like nanowire assemblies. (e) TEM image of a fragment of the feather-like nanowire assemblies with the growth direction indicated by the arrow. (f) TEM image of the octopus-like nanowire assemblies. (g) HRTEM image of the nanowire morphology with the corresponding SAED as an inset.