A hydrophilization procedure of polystyrene substrate surfaces is proposed. Bis-(2-ethylhexyl) sulfosuccinate sodium (AOT) molecules are applied as a hydrophilizing agent. A feature of this procedure is the use of an Au nanoparticle organosol. The organosol allows one to form a hydrophilizing layer with high roughness on the substrate surface. The high roughness is due to the Au nanoparticles encapsulated in this layer. The hydrophilizing effect is greatly enhanced by the high roughness of the hydrophilizing layer. On the sixth day of the hydrophilization, the water contact angle decreases from 95±3 to 31±3˚. Meanwhile, the use of micellar solutions without nanoparticles does not make it possible to achieve such results (the angle decreases from 95±3 to 74±4˚ under similar conditions). The hydrophilization mechanism is described in detail. The polystyrene substrate is completely covered with the hydrophilizing layer during the first hydrophilization day. Then, the substrate wettability is improved only by increasing the roughness of this layer. It has been experimentally established that the proposed procedure is universal and allows one to obtain hydrophilic and superhydrophilic substrates from other materials (viz. Teflon, ITO glass and K glass). Note that the hydrophilized substrates exhibit a plasmon effect. This effect is due to the Au nanoparticles encapsulated in the hydrophilizing layer. The hydrophilizing agent contributes to the stabilization of plasmonic properties.

提出了一种聚苯乙烯基材表面的亲水化程序。双-(2-乙基己基)磺基琥珀酸钠(AOT)分子用作亲水剂。该程序的一个特点是使用金纳米颗粒有机溶胶。有机溶胶允许人们在基材表面上形成具有高粗糙度的亲水层。高粗糙度是由于金纳米粒子封装在这一层。亲水层的高粗糙度大大增强了亲水效果。在亲水化的第六天，水接触角从 95±3 降低到 31±3˚。同时，使用不含纳米颗粒的胶束溶液无法获得这样的结果（在类似条件下，角度从 95±3 降低到 74±4˚）。详细描述了亲水化机理。在第一亲水化日期间，聚苯乙烯基材被亲水层完全覆盖。然后，基板润湿性仅通过增加该层的粗糙度来改善。已经通过实验证明，所提出的程序是通用的，并且允许人们从其他材料（即特氟隆、ITO 玻璃和 K 玻璃）中获得亲水和超亲水基材。请注意，亲水化的底物表现出等离子效应。这种效果是由于包裹在亲水层中的金纳米颗粒。亲水剂有助于稳定等离子体特性。