本文选择合适的表面分散剂，采用微生物方法和表面分析技术研究了在诺卡氏菌体表面化学沉积纳米铜颗粒，形成均匀镀层的加工工艺。结果表明，相同条件下表面活性剂A对菌体的分散效果好于焦磷酸钠。在表面活性剂A和机械搅拌联合分散下，菌体均匀分散在前处理溶液和镀铜液中，菌体表面上成功沉积粒径约为20nm的纳米铜颗粒，并形成厚为200nm左右的均匀镀层，菌体保持原有形状，得到纳米铜颗粒组成的微米级杆状金属材料。
Cu nano-particles and homogeneous Cu coating on Nocadia surface studied by microbiological method and surface analysis technology were prepared by electroless deposition method with appropriate surfactant. It was found that surfactant A was superior to some other kind surfactant under the same other conditions. Nocadia dispersed in pre-processes solutions and electroless plating solutions in the synergistic action of surfactant A and agitation. Cu particles with the size of 20nm deposited on Nocadia surface successfully and formed homogeneous Cu coating with the thickness of 200nm. Nocadia remained their original rod shape after Cu nano-particles deposition. Micro-rod metal material formed of Cu nano-particels was obtained.
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