Abstract

In this paper, we report a simple method to prepare bismuth nanoparticles from bulk bismuth. Bismuth nanoparticles of near spherical shape have been characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and other techniques. Bismuth nanoparticles have mean diameter of 40–50 nm and exhibit the same crystal structure as the bulk bismuth. The surface of bismuth nanoparticle has been oxidized and the thermal analysis shows that bismuth samples contain at least 9 wt.% organic solvent and 76 wt.% metallic bismuth. The tribological property of bismuth nanoparticles as additives in oil is evaluated on a four-ball tester. The results show that bismuth nanoparticles exhibit good performance in wear.

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