Size- and Shape-Controlled Synthesis of Bismuth Nanoparticles

摘要

Near-monodisperse Bi dots in the diameter range of 3-115 nm are synthesized by a simple, solution-based one-step approach by varying the amounts of BiN(SiMe3)23, NaN(SiMe3)2, and a polymer surfactant, poly(1-hexadecene)_(0.67)-co-(1-vinylpyrrolidinone)_(0.33), employed. The reaction conditions are further modified to produce Bi nanorods and nanoplates. Alternatively, near-monodisperse Bi dots in the diameter range of 30—45 nm are synthesized by a secondary-addition technique. With a slight modification of this technique, nanoribbons are obtained. The roles of polymer and NaN(SiMe3)2 in the size and shape control of these Bi nanoparticles are discussed.