Liquid drop evaporation on surfaces is present in many industrial and medical applications, e.g., printed electronics, spraying of pesticides, DNA mapping, etc. Despite this strong interest, a theoretical description of the dynamic of the evaporation of complex liquid mixtures and nanosuspensions is still lacking. Indeed, one of the aspects that have not been included in the current theoretical descriptions is the competition between the kinetics of evaporation and the adsorption of surfactants and/or particles at the liquid/vapor and liquid/solid interfaces. Materials formed by an electrically isolating solid on which a patterned conducting layer was formed by the deposits left after drop evaporation have been considered as very promising for building electrical circuits on flexible plastic substrates. In this work, we have done an exhaustive study of the evaporation of nanosuspensions of latex and hydrophobized silver nanoparticles on four substrates of different hydrophobicity. The advancing and receding contact angles as well as the time dependence of the volume of the droplets have been measured over a broad range of particle concentrations. Also, mixtures of silver particles and a surfactant, commonly used in industrial printing, have been examined. Furthermore, the adsorption kinetics at both the air/liquid and solid/liquid interfaces have been measured. Whereas the latex particles do not adsorb at the solid/liquid and only slightly reduce the surface tension, the silver particles strongly adsorb at both interfaces. The experimental results of the evaporation process were compared with the predictions of the theory of Semenov et al. (Evaporation of Sessile Water Droplets: Universal Behavior in the Presence of Contact Angle Hysteresis. Colloids Surf. Physicochem. Eng. Asp. 2011, 391 (1–3), 135–144) and showed surprisingly good agreement despite that the theory was developed for pure liquids. The morphology of the deposits left by the droplets after total evaporation was studied by scanning electronic microscopy, and the effects of the substrate, the particle nature, and their concentrations on these patterns are discussed.

中文翻译：

---

具有不同疏水性的基质上纳米悬浮液的蒸发

表面上的液滴蒸发存在于许多工业和医学应用中，例如印刷电子产品，农药喷洒，DNA绘图等。尽管人们对此有浓厚的兴趣，但仍对复杂液体混合物和纳米悬浮液的蒸发动力学进行了理论上的描述。不足。实际上，当前理论描述中未包括的方面之一是蒸发动力学与表面活性剂和/或颗粒在液体/蒸汽和液体/固体界面处的吸附之间的竞争。由电绝缘固体形成的材料被认为对于在柔性塑料基板上构建电路非常有前途，该材料通过液滴蒸发后留下的沉积物在其上形成图案化的导电层。在这项工作中，我们对胶乳和疏水化的银纳米颗粒在四种疏水性不同的基质上的纳米悬浮液的蒸发进行了详尽的研究。已在较宽的颗粒浓度范围内测量了液滴的前进和后退接触角以及时间依赖性。另外，已经检查了通常用于工业印刷中的银颗粒和表面活性剂的混合物。此外，已经测量了在空气/液体和固体/液体界面上的吸附动力学。尽管胶乳颗粒不吸附在固/液上，而只是稍微降低了表面张力，但银颗粒却强烈吸附在两个界面上。将蒸发过程的实验结果与Semenov等人的理论预测进行了比较。胶体冲浪。物理化学。。天冬氨酸。2011，尽管该理论的纯液体开发391（1-3），135-144），并表现出出奇的好协议。通过扫描电子显微镜研究了在完全蒸发之后液滴留下的沉积物的形态，并讨论了底物，颗粒性质及其浓度对这些图案的影响。