液体填充的KHCO(3) 微纤维的自组装
Hugo Celio1, Jose Lozano, Hyacinth Cabibil
1Center for Materials Chemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712-1167, USA.
Journal of the American Chemical Society
|March 13, 2003
概括
碳酸 (KHCO3) 纤维自组装,由暴露于二氧化碳和水的聚[(aminopropyl) 氧化]薄膜组成. 这些含有水性酸盐的晶体纤维,通过拟议的多步骤过程形成.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术 纳米技术
背景情况:
- 研究含有离子 (K+/多APS) 的聚合物薄膜.
- 暴露于二氧化碳 (CO2) 和水 (H2O) 引发了转化.
研究的目的:
- 为了研究KHCO3纤维的自我组装.
- 描述这些纤维的形态和组成.
- 为观察到的自组装过程提出一个模型.
主要方法:
- 形成K+/多-APS的玻璃状寡合膜.
- 薄膜暴露于二氧化碳和二氧化.
- 使用拉曼光谱和显微镜进行表征.
主要成果:
- 晶体KHCO3纤维的自组装,直径窄 (0.4-3微米),面积比高 (高达300).
- 纤维主要由KHCO3组成,由拉曼光谱学证实.
- 内部流体相中含有大量的水性酸盐 (KOOCH).
结论:
- 提出了一种多步骤的现象学模型来解释纤维自组装机制.
- 这项研究揭示了聚合物矩阵中无机材料的新型自我组装途径.
- 这些发现有助于理解材料的转化和设计功能性纳米结构.
相关概念视频
Assembly of Cytoskeletal Filaments
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
Disassembly of Intermediate Filaments
Intermediate filaments (IFs) do not undergo spontaneous disassembly. Enzymes, kinases, and phosphatases add and remove phosphates from specific sites to regulate their disassembly. The IF concentration in the cytoplasm also regulates the disassembly. If the concentration crosses a threshold, it activates the protein kinases in the vicinity, allowing the phosphorylation of IFs.
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Micelles
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...


