Photonic Crystals from Coated Colloids

涂层胶体的光子晶体

• 批准号: 5318438
• 负责人: Professor Dr. Frank Caruso
• 金额: --
• 依托单位: Department of Chemical Engineering
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2003-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5318438?language=en
• 关键词: Photonic; Crystals; Coated; Colloids

Three-dimensional photonic crystals (both colloidal crystals and inverse opals) are to be prepared from novel coated colloid (i.e. core-shell) building blocks that afford precise tunability of the optical characteristics of the crystals. The coreshell colloids will be constructed by the layer-by-layer adsorption of various polyelectrolytes as well as preformed inorganic nanoparticles. This strategy will allow independent control over shell thickness and composition. Serval methods will be examined to construct highly ordered three-dimensional photonic crystals, including sedimentation, centrifugation, and electrophoretic deposition. Subsequent removal of the core from the coated colloids yields hollow particles; photonic crystals of these particles will also be constructed in a similar fashion. The advantage of these particles is that they provide an increased refractive index contrast, a parameter essential for a complete stopband. Creating three-dimensional assemblies of these novel and well-defined colloidal entities will yield photonic crystals with unique and tailored photonic properties.

三维光子晶体（胶体晶体和反蛋白石）是从新的涂层胶体（即核-壳）的构建块，提供精确的可调谐性的晶体的光学特性制备。核壳胶体将通过各种聚电解质以及预先形成的无机纳米粒子的逐层吸附来构建。这种策略将允许独立控制外壳厚度和成分。我们将检视几种建构高度有序三维光子晶体的方法，包括沉降法、离心法及电泳沉积法。随后从涂覆的胶体中去除核产生中空颗粒;这些颗粒的光子晶体也将以类似的方式构建。这些颗粒的优点是它们提供增加的折射率对比度，这是完整阻带所必需的参数。创建这些新颖的和定义良好的胶体实体的三维组件将产生具有独特的和定制的光子特性的光子晶体。