Self-assembly of nanoparticle thin films at the liquid-liquid interface

纳米粒子薄膜在液-液界面的自组装

• 批准号: 144407670
• 负责人: Privatdozent Dr. Michael Maas
• 金额: --
• 依托单位: Department of Chemical Engineering
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/144407670?language=en
• 关键词: Self; assembly; nanoparticle; thin; films

The self-assembly of nanoparticles is one of the decisive topics of current research. It leads to the formation of ordered structures on a meso- or macroscopic scale and thus combines the advantages of large scale structures with the special properties of the nanoscale. In this respect it is of foremost interest to investigate new ways for the preparation of self-assembled and at the same time durable nano-structured materials like cohesive thin films. During our studies of the biomimetic formation of calcium carbonate thin films we found a new method for the preparation of cohesive thin films at the liquid-liquid interface, which consist of a mixture of a surfactant (e.g. stearic acid) and nanoparticles (e.g. Silica Ludox beads). Although the mechanism of film formation is at present unknown to us, this system presents a straight-forward approach which can be studied by means of interfacial rheology and methods of colloid and interface sciences. Accordingly the focus of the proposed research plan lies in the investigation of the phenomena that occur at the liquid-liquid interface during film growth and the adsorption of particles. These can include the mutual permeation of both phases, the formation of local microemulsions, micelles, lamellar phases or other structures that emerge during film formation and that are guided by the composition of the organic phase. Most importantly, the interaction of the nanoparticles with surfactants that leads to the film formation needs to be studied in detail.

纳米粒子的自组装是当前研究的决定性课题之一。它导致在介观或宏观尺度上形成有序结构，从而将大尺度结构的优点与纳米尺度的特殊性质相结合。在这方面，最感兴趣的是研究制备自组装的新方法，同时制备耐用的纳米结构材料，如粘性薄膜。在我们的碳酸钙薄膜的仿生形成的研究中，我们发现了一种新的方法，用于在液-液界面处制备粘性薄膜，其由表面活性剂（例如硬脂酸）和纳米颗粒（例如二氧化硅Ludox珠）的混合物组成。虽然膜形成的机制是目前未知的我们，这个系统提出了一个直接的方法，可以通过界面流变学和胶体和界面科学的方法进行研究。因此，所提出的研究计划的重点在于调查的现象，发生在液-液界面的薄膜生长和吸附的颗粒。这些可以包括两相的相互渗透，形成局部微乳液、胶束、层状相或在成膜期间出现并由有机相的组成引导的其它结构。最重要的是，纳米粒子与表面活性剂的相互作用，导致膜的形成需要详细研究。