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Updated: May 10, 2026
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Resolving Water, Proteins, and Lipids from In Vivo Confocal Raman Spectra of Stratum Corneum through a Chemometric Approach
Published on: September 26, 2019
Water exclusion layers probed by depth scan confocal Raman microscopy
Omar Teschke1, Luiz O Bonugli, Marcus V P dos Santos
1Laboratório de Nanoestruturas e Interfaces, Instituto de Física, UNICAMP, 13083-859 Campinas, SP, Brazil.
Summary
Superhydrophobic films were studied using depth scan confocal Raman microscopy. Water was found only at fiber apexes, with vapor layers within the fiber structure.
Area of Science:
- Materials Science
- Surface Chemistry
- Physics
Background:
- Superhydrophobic surfaces exhibit water-repellent properties.
- Understanding water and air distribution is crucial for their performance.
- Heterogeneous surfaces offer unique interfacial phenomena.
Purpose of the Study:
- To map water and air spatial distributions in immersed superhydrophobic films.
- To investigate interfacial behavior on heterogeneous superhydrophobic surfaces.
- To analyze the role of surface topography in liquid-vapor interactions.
Main Methods:
- Depth scan confocal Raman microscopy was utilized.
- Analysis of spatial distributions of water and air.
- Probing heterogeneous surfaces with coexisting solid-liquid, liquid-vapor, and vapor-solid interfaces.
Main Results:
- Water and air spatial distributions were successfully mapped.
- Liquid exclusion (vapor) layers were observed within the fiber arrangement.
- Water was found to be in contact exclusively at the fiber apexes.
Conclusions:
- Depth scan confocal Raman microscopy is effective for characterizing water and air in superhydrophobic films.
- Heterogeneous surfaces promote distinct liquid-vapor phase separation.
- Surface topography significantly influences wetting behavior and fluid distribution.
