常温下,以胰蛋白酶(trypsin)为模板,以抗坏血酸(AA)为还原剂一步合成了花状纳米金.通过考察AA的浓度和pH值等对金纳米粒子形成的影响,初步探讨花状纳米金的生长机理.结果表明,在pH值为5.0的水溶液中,固定HAuCl4与trypsin的体积比为5∶1,加入抗坏血酸,并使AA终浓度为3.0 mM,可制备性状稳定、尺寸为80～120 nm的花状纳米金.
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