If ethanol existed in the reacting system, the shape of the nanoparticles changed from rod to spheroid, further into irregular agglomerate with increase of the volume ratio of ethanol to water.

• 向反应体系中引入乙醇，随着乙醇与水的体积比例的增加，粒子由棒状向球状转变，进而形成不规则絮状凝聚体。