陈化胶体金的简便合成与光谱特性（英文）

发布时间：2018-05-24 12:25

本文选题：纳米金 + 胶体　；参考：《稀有金属材料与工程》2017年02期

【摘要】：描述了通过只添加氢氧化钠到氯金酸和十六烷基三甲基溴化铵混合液中合成陈化纳米金胶体,并研究了该胶体的光谱特性。基于傅里叶红外光谱对纳米金的形成机理进行了分析并以紫外可见光谱和扫描电子显微镜表征了添加不同量的氢氧化钠而获得的陈化3 m的胶体金。同时获得了吸附于陈化了3 m的胶体金表面上的亚甲基蓝的表面增强拉曼光谱。结果表明,陈化3 m的胶体金其紫外可见光谱具有宽的等离子吸收峰,对这种宽化改变进行了解释分析。其透射电子显微镜分析表明在纳米金合成阶段,添加不同量的氢氧化钠可影响纳米金大小,同时不同量的氢氧化钠影响着胶体金的陈化过程并产生出形状依赖的陈化胶体金。表面增强拉曼光谱的增强特性不同证明了所形成的陈化胶体金的大小/形状依赖特征。因此,我们期望着这种陈化胶体金能够在生化分析领域被得到开发应用。
[Abstract]:This paper describes the synthesis of aging nanometer gold colloid by adding only sodium hydroxide to the mixture of chloruronic acid and cetyltrimethylammonium bromide, and studies the spectral properties of the colloid. The formation mechanism of nanocrystalline gold was analyzed based on Fourier transform infrared spectroscopy (FTIR). The colloidal gold aged 3 m was characterized by UV-Vis spectra and scanning electron microscopy (SEM). The surface-enhanced Raman spectra of methylene blue adsorbed on the surface of colloidal gold aged 3 m were also obtained. The results show that the UV-Vis spectrum of the colloidal gold aged 3 m has a wide plasma absorption peak, which is explained and analyzed. The TEM analysis shows that the addition of different amounts of sodium hydroxide can affect the size of gold nanoparticles, and the different amount of sodium hydroxide can affect the aging process of colloidal gold and produce shape dependent colloidal gold. The size / shape dependence of the aged colloidal gold is proved by the different enhancement characteristics of surface-enhanced Raman spectroscopy. Therefore, we hope that this aging colloidal gold can be developed and applied in the field of biochemical analysis.
【作者单位】：云南师范大学;
【基金】：National Natural Science Foundation of China(21171072,21361028) Yunnan Applied Basic Research Projects(2014FB140) Scientific Research Foundation for Ph.D.’s of Yunnan Normal University
【分类号】：O614.123;O648.1;TB383.1

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