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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.
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Li et al. (2003) studied this question.
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