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使用微滴的接触角度绘制地图

Benjamin Thorne¹, Jianping Xu¹, Sharath Chandra Mahavadi²

¹School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, United States.

Langmuir : the ACS journal of surfaces and colloids

|August 6, 2025

概括

这项研究引入了一种新的度仪,用于精确的微观接触角度测量. 该设备以高分辨率绘制了表面可湿度图,有助于从碳封存到抗生素疗效的应用.

科学领域:

表面科学是一门科学.
材料科学是一种材料科学.
流体动力学流体动力学

背景情况:

不同质的表面对传统的接触角测量构成挑战.
现有的微接触角度方法缺乏足够的空间分辨率或依赖于间接测量.

研究的目的:

开发一种新型的接触角度测绘度仪,用于高分辨率的湿度表征.
在微尺度表面上量化明显的接触角和接触角歇斯底里.

主要方法:

使用一种新的度仪来沉积picoliter的水滴.
实现空间分辨率低至几十微米的接触角度映射.
在测试表面和自然样本上验证设备的有效性.

主要成果:

具备可视化和量化明显接触角度和hysteresis的能力.
成功应用于地质碳封存研究的三级玄武岩样本.
检查了 * Bacillus subtilis * 生物膜的可湿性及其对抗生素疗效的影响.

结论:

开发的度仪在微尺度表面湿透性分析方面取得了重大进展.
为各种应用,包括能源和医学,提供了对表面特性的关键见解.
增强对异质材料上的流体表面相互作用的理解.

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Contact Angle

Contact Angle

When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...