Octahedral gold nanocrystals have been fabricated in an alcohol ionic liquid by a one-step method in the absence of any extra capping agent. The method is based on a reaction of HAuCl4·4H2O in 1-(3-hydroxylpropyl)-3-methylimidazolium tetrafluoroborate (C3OHmimBF4) by microwave heating. Upon adjusting HAuCl4·4H2O concentration and reaction temperature, nanoplates and micrometer-sized particles have also been obtained.
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