Ultrathin cross-linked nanoparticle membranes
Ultrathin cross-linked nanoparticle membranes
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DOI：
10.1021/ja036919a
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发表时间：
2003-10-22
影响因子：
15
通讯作者：
Russell, TP
中科院分区：
文献类型：
--
作者：
Lin, Y;Skaff, H;Russell, TP
用于传感、封装和传输的功能纳米结构材料的制造需要在多个长度尺度上自组装的实用方法，以及合成坚韧但可渗透的结构。在这里，功能化的光致发光纳米颗粒在液体界面上的自组装，随后是相关配体的交联，提供了坚固的膜，即使它们从界面上移除，也能保持其完整性。这些纳米厚度的复合膜具有弹性和渗透性，在控制渗透和扩散方面具有潜在的应用前景。使用硒化镉纳米粒子，因为其固有的光致发光提供了一种直接的方法来探测粒子的空间组织。功能化配体附着在纳米颗粒上，提供了一种通过交联稳定界面组装的有效手段。所示的概念适用于其他类型的纳米颗粒、配体和溶剂组合。
The fabrication of functional nanostructured materials for sensing, encapsulation and delivery requires practical approaches to self-assembly on multiple length scales and the synthesis of tough yet permeable structures. Here, the self-assembly of functionalized, photoluminescent nanoparticles at liquid interfaces, followed by cross-linking of the associated ligands, affords robust membranes that maintain their integrity even when they are removed from the interface. These composite membranes, nanometers in thickness, are elastic yet permeable and have potential applications involving controlled permeability and diffusion. Cadmium selenide (CdSe) nanoparticles are used, since their inherent photoluminescence offers a direct way to probe the spatial organization of the particles. Functionalized ligands attached to the nanoparticles provide an effective means to stabilize the interfacial assembly by cross-linking. The concepts shown are adaptable to other type of nanoparticles, ligands, and solvent combinations.