APTES模板法合成尺寸可控的空心金纳米壳

发布时间：2018-11-10 06:46

【摘要】：核壳型金纳米材料具有独特的光学性质，目前已被广泛应用于生化分析、医学成像及临床治疗等多个领域。本论文主要研究了金纳米壳结构材料的可控合成。以硅烷偶联剂三氨丙基三乙氧基硅烷（APTES）在水中形成的悬浮液为模板，利用APTES悬浮液对不同金前体溶液的响应行为，发展了一锅法（one-potsynthesis）制备金纳米壳材料的方法，，材料的尺寸及表面等离子体吸收性质可连续调控。并对材料的胶体稳定性和光热性质等做了系统的研究。主要的工作内容包括：（1）金纳米壳的可控合成。以APTES悬浮液为模板发展了一种在室温下合成金纳米壳材料的新方法。研究发现，调节四氯金酸溶液的浓度能够显著影响APTES悬浮液的形成状态，APTES模板的尺寸随四氯金酸浓度的增加而增大。以此为基础，制备出一系列具有不同尺寸的金纳米壳材料，其表面等离子体吸收光谱在657-957nm范围内可调，合成方法简单。同时发现反应体系的醇水比例也对金纳米壳的合成有较大影响。（2）金纳米壳性质研究。研究了不同配体对所合成材料的胶体稳定性的影响，发现以牛血清白蛋白为配体合成的金纳米壳材料具有较好的胶体稳定性。对不同尺寸的金纳米壳进行光热转化实验，得到了不同尺寸金纳米壳的光热转换效率，其中，37nm的金纳米壳的光热转换效率高达45%。循环光热实验进一步证明了不同尺寸的金纳米壳都具有良好的光热稳定性。
[Abstract]:Core-shell gold nanomaterials have unique optical properties and have been widely used in many fields such as biochemical analysis medical imaging and clinical treatment. In this paper, the controllable synthesis of gold nanoshell materials was studied. Using the suspension of triaminopropyl triethoxy silane (APTES) as a template and the response of APTES suspension to different gold precursor solutions, a one-pot method (one-potsynthesis) for the preparation of gold nanoparticles was developed. The size of the material and the absorption properties of surface plasmas can be continuously regulated. The colloidal stability and photothermal properties of the materials were systematically studied. The main work includes: (1) controllable synthesis of gold nanoshell. A new method for the synthesis of gold nanoshell materials at room temperature was developed using APTES suspension as template. It was found that adjusting the concentration of tetrachloroauric acid solution could significantly affect the formation of APTES suspensions, and the size of APTES template increased with the increase of the concentration of tetrachloroauric acid. On this basis, a series of gold nanoshell materials with different sizes have been prepared. The surface plasma absorption spectra of the materials are adjustable in the range of 657-957nm, and the synthesis method is simple. At the same time, it was found that the ratio of alcohol to water also had a great influence on the synthesis of gold nanoshell. (2) study on the properties of gold nanoshell. The effects of different ligands on the colloidal stability of the synthesized materials were studied. It was found that the gold nanoshell materials synthesized with bovine serum albumin (BSA) as ligands had good colloidal stability. The photothermal conversion efficiency of gold nanoshells with different sizes was obtained by photothermal conversion experiments. The photothermal conversion efficiency of 37nm gold nanoshells was as high as 45. The cyclic photothermal experiments further proved that the gold nanoshells of different sizes have good photothermal stability.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1;O614.123

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