研究了在葡萄糖溶液中HAuCl4的光化学还原过程及葡萄糖的含量对最终金纳米粒子形状的影响.当葡萄糖:金离子的质量比小于2g/1.2mg时,可得到各向异性金纳米粒子,其中质量比为0.5g/1.2mg时得到形貌良好的金纳米锥；当质量比在2～7g/1.2mg间变化时,能获得较小尺寸的球形(或类球形)金纳米粒子;而当质量比大于7g/1.2mg时,只能得到粒子尺寸较大、形貌也不均一的类球形纳米粒子.简要探讨了紫外光的作用机理和不同形貌金纳米粒子的形成原因.%The photochemical reduction process of HAuCl4 and the effect of glucose content on the final shape of gold nanoparticles were investigated. When the mass ratio of glucose and gold ions was less than 2 g/1.2 mg, anisotrapic gold nanoparticles can be obtained. Especially, gold nano - pyramids with perfect shape were synthesized at 0. 5 g/1.2 mg mass ratio. When the mass ratio was changed between 2 g/ 1.2 mg to 7 g/1.2 mg, spherical (or quasi -spherical) gold nanoparticles with small size can be obtained. When the mass ratio was more than 7 g/1. 2 mg, only quasi -spherical nanoparticles with large size and un - uniform shape were obtained. The mechanisms of UV light action and formation for different shapes of gold nanoparticles were discussed briefly.
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