Formation and characterization of nanoparticle-bearing threads of silicon, germanium and tin

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Abstract
We report the formation and characterization of nanoparticles and their assemblage to form a threadlike microstructure of silicon, germanium and tin, by the process of thermal deposition in helium ambient under varied conditions of pressure. The structural characterization of the nanoparticles was done by transmission electron microscope (Philips CM12). Resistance versus temperature (R -T ) measurements, on the thin films embodying nanothreads, exhibited anomalous behaviour embodying erratic changes in R -T variations. This was suggestive of variation of nanoparticle distribution with increase in temperature.