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Updated: Dec 25, 2025

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

Intermediate wetting state at nano/microstructured surfaces.

Gyoko Nagayama¹, Dejian Zhang

¹Department of Mechanical Engineering, Kyushu Institute of Technology, Sensui 1-1, Tobata, Kitakyushu, Fukuoka 804-8550, Japan. nagayama.gyoko725@mail.kyutech.jp.

|March 28, 2020

Summary

This summary is machine-generated.

A new partial wetting model explains deviations in water contact angles on hydrophobic surfaces. This model accurately predicts wetting behavior across various surface structures, unlike classical theories.

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Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

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Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment

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Published on: November 9, 2015

Area of Science:

Surface science
Materials science
Thermodynamics

Background:

Classical wetting models (Wenzel, Cassie-Baxter) often fail to predict experimental results for hydrophobic surfaces.
Deviations are attributed to intermediate wetting states not covered by existing theories.

Purpose of the Study:

To propose a general partial wetting model for intermediate wetting states.
To explain discrepancies between experimental data and classical wetting models.
To provide a model consistent with Wenzel and Cassie-Baxter models at limiting cases.

Main Methods:

Derivation of a theoretical partial wetting model using thermodynamic energy minimization.
Experimental preparation of silicon (Si) surfaces with varying physical morphologies (porous, patterned, hierarchical nano/microstructured).
Measurement of water contact angles on prepared Si surfaces.

Main Results:

The proposed partial wetting model incorporates structural parameters and an effective wetting ratio (f).
Experimental water contact angles on diverse Si surfaces deviated significantly from Wenzel and Cassie-Baxter models.
The partial wetting model demonstrated good agreement with experimental findings.

Conclusions:

The developed partial wetting model offers a more accurate description of wetting phenomena on complex hydrophobic surfaces.
This model bridges the gap between theoretical predictions and experimental observations for intermediate wetting states.
Understanding partial wetting is crucial for designing surfaces with tailored wettability.