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聚乙二醇光化学法制备金纳米微粒及共振散射光谱研究
Photochemical Preparation of Au Nanoparticles with Polyethyelene Glycol and Its Resonance Scattering Spectral Study
【摘要】 采用共振散射光谱、紫外-可见吸收光谱、透射电镜对聚乙二醇(PEG)-Au3+纳米光化学反应进行了研究。讨论了金纳米粒子合成条件的影响,发现金纳米粒子的尺寸与PEG分子量大小有关。建立了一个利用不同分子量PEG制备一系列粒径为6~60 nm金纳米粒子的光化学合成新方法。根据PEG分子的空间位阻、疏水性等解释了PEG分子量不同而获得不同粒径金纳米粒子的原因。提出了一个合理的纳米光化学反应机理。
【Abstract】 The nano-photochemical reaction of polyethyelene glycol(PEG)-Au3+ was studied by resonance scattering and absorption spectrophotometry,and transmission electron microscopy.Influence of various factors on the preparation of gold nanoparticles was(considered.) There is a correlation between the molecular mass of PEG and the size of gold nanoparticles.A new photochemical method was proposed for the preparation of gold nanoparticles in size of 6-60 nm,using different molecular mass of PEG.The cause of obtaining gold nanoparticle with different size is the different space effect and hydrophobic property of PEG.A reasonable nano-reaction mechanism was developed.
【Key words】 Photochemical reaction; Gold nanoparticles; Polyethyelene glycol; Resonance scattering;
- 【文献出处】 光谱学与光谱分析 ,Spectroscopy and Spectral Analysis , 编辑部邮箱 ,2005年11期
- 【分类号】O614.123;O657.3;
- 【被引频次】22
- 【下载频次】506