Controlling the surface properties and structure of thin nanosized coatings is of primary importance in diverse engineering and medical applications. Here we report on how the nanostructure, growth mechanism, thickness, roughness, and hydrophilicity of nanocomposites composed of weak natural or strong synthetic polyelectrolytes (PE) can be tailored by graphene oxide (GO) doping. GO reverses the build‐up mechanism affecting the internal structure and the hydrophilicity in a way depending on the type of the PE‐matrix. The extent of GO‐adsorption and its impact on the surface morphology was found to be independent on the type of the underlying PE‐matrix. The nanostructure of the hybrid films is not significantly altered when a single surface‐exposed GO‐layer is deposited, while increasing the number of embedded GO‐layers leads to pronounced surface heterogeneity. These results are expected to have valuable impact on the construction strategies of coatings with tunable surface properties.

中文翻译：

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氧化石墨烯掺杂对天然和合成聚合物基质内部结构和表面性质的调节

在各种工程和医学应用中，控制纳米薄涂层的表面性能和结构至关重要。在这里，我们报告了如何通过氧化石墨烯（GO）掺杂定制由弱天然或强合成聚电解质（PE）组成的纳米复合材料的纳米结构，生长机理，厚度，粗糙度和亲水性。GO会根据PE基质的类型改变影响内部结构和亲水性的堆积机理。发现GO吸附的程度及其对表面形态的影响与基础PE基质的类型无关。当沉积单个表面暴露的GO层时，杂化膜的纳米结构不会显着改变，同时增加嵌入式GO层的数量会导致明显的表面异质性。预期这些结果将对具有可调表面性能的涂料的构造策略产生有价值的影响。