Melting, Expansion Behavior and Electric Transport of In-Filling in MgO Nanotubes
Abstract:By using a one-step approach, In-filled MgO nanotubes with diameters of 200–300 nm and lengths of several micrometers are synthesized. A Gatan heating experiment in a transmission electron microscope (TEM) shows that In-filling begins to melt far below the melting point 156.6 °C of In and abnormally shrinks upon increasing temperature above 270 °C. Massive In-filled MgO nanotubes were pressed into a disk and its resistance starts dramatically decrease upon increasing temperature above ∼150 °C, suggesting a temperature switch with a protective point ∼150 °C. The expansion and I–Vcharacteristics were discussed.
Document Type: Research Article
Publication date: 2012-03-01
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