Abstract

In the present work, we have proposed a method for estimating the roughness coefficient of films based on organosols of silver nanoparticles under conditions of homogeneous and heterogeneous wetting using the method for determining contact angles. Concentrated organosols of silver nanoparticles stabilized with a nonionic surfactant sorbitan monooleate have been used as initial systems. Films based on sols of silver nanoparticles were prepared by the Doctor Blade method followed by thermolysis (473–673 K for 2 h). All the samples were hydrophilic and had a complex, rough, and chemically inhomogeneous surface that could not be studied using the traditional wetting theory. Modification of the surface of the samples, as well as the smooth initial substrate, by deposition of gold nanoparticles of a size of 10 nm by ion sputtering have allowed us to prepare chemically homogeneous surfaces from the same material. Studies of the wettability of finite systems have allowed us to calculate their roughness coefficients. The parameter values ranged from 1.08 to 2.83 depending on the thermolysis temperature.

中文翻译：

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通过确定接触角研究基于银纳米粒子有机溶胶的薄膜粗糙度

摘要

在目前的工作中，我们提出了一种使用接触角确定方法在均匀和非均匀润湿条件下基于银纳米颗粒有机溶胶的薄膜粗糙度系数估计方法。用非离子表面活性剂脱水山梨醇单油酸酯稳定的银纳米颗粒的浓缩有机溶胶已用作初始体系。基于银纳米粒子溶胶的薄膜是通过Doctor Blade方法制备的，然后进行热分解（473–673 K，持续2 h）。所有样品都是亲水性的，具有复杂，粗糙和化学不均匀的表面，无法使用传统的润湿理论进行研究。样品表面以及光滑的初始基材的改性，通过离子溅射沉积大小为10 nm的金纳米颗粒，使我们能够用相同的材​​料制备化学均一的表面。对有限系统的润湿性的研究使我们能够计算其粗糙度系数。根据热分解温度，参数值的范围为1.08至2.83。