Superspreading Wetting of Nanofluid Droplet Laden with Highly Dispersed Nanoparticles

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2024-12-02 DOI:10.1021/acs.langmuir.4c0334710.1021/acs.langmuir.4c03347

Eita Shoji*, Akira Hoshino, Tetsushi Biwa, Masaki Kubo, Takao Tsukada, Takaaki Tomai and Tadafumi Adschiri,

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引用次数: 0

Abstract

Wetting of nanofluids containing highly dispersed nanoparticles of single-nanometer size was investigated, as these nanoparticles can persist within a nanometer-scale liquid film near contact line, potentially causing significant changes in wetting characteristics. We discerned distinctive superspreading wetting, featured by temporal indices (0.29 to 0.46) in the relationship between contact radius and time. We employed a phase-shifting imaging ellipsometer to measure droplet shape, including the nanometer-scale liquid film and nanoparticle layer after drying. The liquid film shapes differed from pure liquids at micrometer-scale but not at nanometer-scale. Furthermore, surface tension measurements and substrate surface energy control contributed to unraveling these characteristics. These findings differentiated the observed superspreading wetting from the mechanisms proposed in existing studies of aqueous surfactant solutions.

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富含高度分散纳米颗粒的纳米流体液滴的超扩展润湿

研究了含有高度分散的单纳米尺寸纳米颗粒的纳米流体的润湿性，因为这些纳米颗粒可以在靠近接触线的纳米尺度液膜中持续存在，可能导致润湿特性的显著变化。在接触半径与时间的关系中，我们发现了明显的超扩散润湿，其特征是时间指数（0.29 ~ 0.46）。我们使用相移成像椭偏仪测量液滴的形状，包括干燥后的纳米级液膜和纳米颗粒层。在微米尺度上，液体膜的形状与纯液体不同，而在纳米尺度上则不同。此外，表面张力测量和基材表面能控制有助于揭示这些特征。这些发现将观察到的超扩散润湿机制与现有的表面活性剂水溶液研究中提出的机制区分开来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).