Indium-Assisted Growth of Aligned Ultra-Long Silica Nanotubes



Well-aligned silica nanotubes with lengths up to 0.9–1.0 mm have been prepared via a vapor–liquid–solid process. The nanotubes are either partially filled with indium or hollow (see Figure). The thermal expansion behavior of a liquid indium column inside a silica nanotube, a prospective novel inorganic nanotube-based nanothermometer, is analyzed in a transmission electron microscope.