In Situ Droplet Microgoniometry Using Optical Microscopy
| Autor: | Young Seong Kim, Luwen Sun, Nenad Miljkovic, Hyeongyun Cha, Jiashuo Tong, Jingcheng Ma, Longnan Li |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Condensation General Engineering General Physics and Astronomy 02 engineering and technology Surface finish 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ray 0104 chemical sciences law.invention Contact angle Optics Optical microscope law Goniometer General Materials Science Wetting 0210 nano-technology business Wilhelmy plate |
| Zdroj: | ACS Nano. 13:13343-13353 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | Solid–liquid interactions are ubiquitous phenomena in nature and industry. Wettability of a liquid on a solid is governed by the chemical heterogeneity and physical roughness of the solid surface and can be characterized by measuring the advancing and receding contact angles of the liquid droplet residing on the solid. To characterize contact angle, goniometry and the Wilhelmy plate method have been widely used. Although powerful, these methods have difficulty characterizing microdroplets, can be cumbersome and expensive, and have trouble handling surfaces with local wetting heterogeneity and deformed noncircular contact lines. Furthermore, past methods are incapable of measuring contact angle in situ during experiments (e.g., condensation). Here, we develop simple yet powerful contact angle measurement techniques using conventional optical microscopy that utilizes focal plane shift imaging, ray optics, and wave interference. We used our techniques to study the wetting characteristics for a wide range of ... |
| Databáze: | OpenAIRE |
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