Synthesis and Functions of Metal Nanoparticle-Hybrids based on Cubic Silsesquioxanes

开发用于构建和图案化金属纳米颗粒的周期性结构的新方法是纳米技术中实际应用的化学中的关键过程和重要目标，因为它们提供对宏观性质的分子水平控制。本研究的目的是制备基于多面体八倍半硅氧烷的金属纳米粒子杂化物。主要研究结果如下：通过自组织球形模板，在溶液中将八（3-氨丙基）八倍半硅氧烷八盐酸盐（OAPOSS）与醋酸钯混合，制备了溶液中胶体形式的钯纳米粒子球形聚集体。利用G1.0 PAMAM树枝状大分子在酸性甲醇溶液中自组装成钯纳米粒子的线状聚集体，将OAPOSS保护的金纳米粒子在载玻片上有效组装成二维纳米粒子阵列，通过羧酸根阴离子与铵阳离子之间的静电相互作用制备了功能化金纳米粒子与OAPOSS的自组装纳米复合物.随后在纳米复合材料中的反应性离子对之间的化学反应产生了两个组分之间的酰胺键。通过将带负电荷的玻璃基底交替浸入OAPOSS和阴离子金纳米颗粒溶液中的简单方法，成功地制备了逐层自组装多层膜。

Development of new methods for building and patterning periodic structures of the metal nanoparticles is a critical process and an important goal in the chemistries for practical applications in nanotechnology as they provide a molecular-level control over the macroscopic properties. The aim of this research has been prepared metal nanoparticle-hybrids based on polyhedral octasilsesquioxanes The main results are summarized as follows.Spherical aggregates of palladium nanoparticles as colloidal forms in solution via self-organized spherical templates in a solution were prepared by mixing octa(3-aminopropyl)octasilsesquioxane octahydrochloride (OAPOSS) and palladium acetate in methanol. Wire-like aggregates of palladium nanoparticles were self-organized in an acidic methanol solution by using the G1.0 PAMAM dendrimer.The gold nanoparticles protected by OAPOSS were assembled effectively on a slide glass to produce a 2D array of the nanoparticles.Self-organized nanocomposites of functionalized gold nanoparticles with OAPOSS were prepared via electrostatic interaction between the carboxylate anions and ammonium cations. Subsequent chemical reaction between the reactive ion couples well-defined in the nanocomposites generated amide bonds between the two components.Layer-by-layer self-assembled multilayer films were successfully prepared via the adsorption of a facile approach of immersing the negatively charged glass substrates into OAPOSS and anionic gold nanoparticles solutions alternatively.