Gold nanocrystals were prepared by a microwave (MW)-polyol method using di-, tetra-, and poly(ethylene glycol)s. When these polyols were heated to 240°C at a heating rate of 160°C/min and held at 240°C for 5 min, icosahedral particles with average diameters of 55-85 nm were prepared from HAuCl4/PVP in di-, tetra- and poly(ethylene glycol)s at high yield (>91%). Plate-like and decahedral particles were obtained at high yields from HAuCl4/PVP/NaCl.
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