The design and facile fabrication of an amphipathic, mechanically durable, nanoparticle (NP)-decorated film has been realized at a liquid/liquid interphase. The innovative film is prepared by applying a changing electric field across an organic-aqueous interphase in the presence of 1–2 nm metal NPs, with a specific focus on Ir NPs in this work, self-assembled at the interphase, where the organic phase consists of a dissolved hydrophobic polymer in a volatile solvent. The electrochemical process leads to the oxidation of the Ir to IrOx, forming a hydrous oxide matrix at the interphase. With evaporation of the residual volatile solvent and precipitation of the polymer backbone, an isolable Ir/IrOx-decorated film is realized. The novelty of this technique stems from the ability to fabricate a substrate material in situ around a nanoparticle matrix, as opposed to transferring the matrix onto a substrate. The subsequent film exhibits a hydrophobic and a hydrophilic surface, permitting the film to reside at a water/oil, water/air, or oil/air interphase. The differences in wettability are attributed to the differences in the chemical and physical properties of the two sides of the film. Interestingly, despite both sides of the film exhibiting different wettabilities, both sides are electrochemically accessible. Several potential applications exist for this film, including the separation and collection of oil from water, in biosensors, and as catalyst layers.

中文翻译：

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自支撑纳米粒子装饰的两亲膜在液/液界面的制备。

两亲性，机械耐用的纳米颗粒（NP）装饰膜的设计和简便制造已经在液/液界面进行了。这种创新的薄膜是通过在存在1-2 nm金属NP的情况下在有机-水界面上施加变化的电场来制备的，在这项工作中，重点特别放在Ir NP上，该界面在界面上自组装，其中有机相在有机相中自组装。由在挥发性溶剂中溶解的疏水性聚合物组成。电化学过程导致Ir氧化为IrOx，在相间形成含水氧化物基质。通过蒸发残留的挥发性溶剂和沉淀聚合物主链，可以得到可分离的Ir / IrOx装饰膜。该技术的新颖性源于原位制造衬底材料的能力围绕纳米颗粒基质，而不是将基质转移到基质上。随后的膜表现出疏水性和亲水性表面，从而允许该膜停留在水/油，水/空气或油/空气界面。润湿性的差异归因于薄膜两侧的化学和物理性质的差异。有趣的是，尽管薄膜的两面都表现出不同的润湿性，但两面都是电化学可及的。这种膜存在几种潜在的应用，包括在生物传感器中和作为催化剂层从水中分离和收集油。