Nanophase‐separated membranes hold promise for fast molecule or ion transfer. However, development and practical application are significantly hindered by both the difficulty of chemical modification and nanophase instability. This can be addressed by organic–inorganic hybridization of functional fillers with a precise distribution in specific nanophase. Here, a molecular‐level hybridization for nanophase‐separated Nafion using 2–5 nm quantum dots (QDs) as a new smart filler is demonstrated. Two kinds of QDs are prepared and used: hydrophilic polymer‐like QDs (PQDs) and hydrophobic graphene oxide QDs (GQDs). Because of selective interactions, QDs offer advantages of matched structural size and automatic recognition with the nanophase. A distinctive synthesis of subordinate‐assembly, in which QDs are driven by the self‐assembly of Nafion affinity chains, is reported. This results in a precise distribution of QDs in the ionic, or backbone, nanophases of Nafion. The resulting PQDs in the ionic nanophase significantly increase membrane proton conduction and device output‐power without loss of mechanical stability. This is difficult to realize with conventional fillers. The GQDs in the backbone nanophase reduce the crystallinity and significantly augment membrane water uptake and swelling capacities.

中文翻译：

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Nafion与量子点的分子级杂交可高度增强质子传导。

纳米相分离的膜有望实现快速的分子或离子转移。然而，化学修饰的难度和纳米相的不稳定性都极大地阻碍了开发和实际应用。这可以通过在特定纳米相中精确分布的功能性填料的有机-无机杂化来解决。在这里，展示了使用2–5 nm量子点（QD）作为新型智能填充剂的纳米相分离Nafion的分子级杂交。制备并使用了两种QD：类亲水性聚合物QD（PQD）和疏水性氧化石墨烯QD（GQD）。由于选择性相互作用，量子点提供了匹配的结构尺寸和纳米相自动识别的优势。下属组装的独特综合，据报道，量子点是由Nafion亲和力链的自组装驱动的。这导致QD在Nafion的离子或主链纳米相中的精确分布。离子纳米相中生成的PQD显着增加了膜质子传导和设备的输出功率，而又不损失机械稳定性。用常规填料很难实现这一点。骨架纳米相中的GQD降低了结晶度，并显着提高了膜的吸水率和溶胀能力。