Abstract
In this work, bismuth nanoparticles were synthesized when a precursor, sodium bismuthate,was exposed to an electron beam at room temperature in a transmission electronmicroscope (TEM). The irradiation effects were investigated in situ using selected-areaelectron diffraction, high-resolution transmission electron microscopy and x-ray energydispersive spectroscopy. After the electron irradiation, bismuth nanoparticles with arhombohedral structure and diameter of 6 nm were observed. The average particle sizeincreased with the irradiation time. The electron-induced reduction is attributed to thedesorption of oxygen ions. This method offers a one-step route to synthesize bismuthnanoparticles using electron irradiation, and the particle size can be controlled by theirradiation time.
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