加入聚乙烯吡咯烷酮(PVP)做稳定化试剂,用硼氢化钾还原氯金酸,结合晶种生长法制备了单分散性、粒径小的胶体金.通过晶种生长法,在反应中加入PVP试剂,用抗坏血酸做还原剂,制备了单分散的金纳米棒.结果表明,PVP试剂对金纳米粒子的形貌有重要的影响;加入PVP试剂得到的金纳米粒子(胶体金和金纳米棒)分散性好,无明显的团聚现象.应用透射电镜,纳米粒度分析仪和紫外-可见分光光度计对不同粒径的纳米金进行了表征.
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