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Adhesion Force Evolution Mediated by Capillary Condensation under Varied Macroscopic Humidity or Interface
Fangfang Liu1,2, Long Ling1,2, Chuanliang Gao1,2
1Anhui Provincial Key Laboratory of Measuring Theory and Precision Instrument, Hefei University of Technology, Hefei 230009, People's Republic of China.
Langmuir : the ACS Journal of Surfaces and Colloids
|April 3, 2026
Summary
This study models capillary adhesion forces, crucial for micro/nanoscale devices. New models accurately predict forces based on humidity and surface roughness, enhancing micro/nanosystem reliability.
Area of Science:
- Physics
- Materials Science
- Nanotechnology
Background:
- Interface forces govern micro/nanoscale device interactions.
- Capillary adhesion force is a key component affecting micro/nanosystem accuracy and reliability.
Purpose of the Study:
- To develop accurate theoretical models for capillary force.
- To investigate the influence of relative humidity and surface roughness on capillary adhesion.
- To experimentally validate the developed models.
Main Methods:
- Established a theoretical model for capillary force considering relative humidity.
- Developed a model for capillary force based on surface roughness and partial infiltration.
- Utilized a high-sensitivity force measurement system with a micrometer-scale probe tip.
Main Results:
- The theoretical models accurately describe capillary adhesion between real workpiece surfaces.
- Experimental results validate the accuracy of the developed models.
- Revealed relationships between effective distance, capillary force change rate, relative humidity, and surface roughness.
Conclusions:
- The models provide a more accurate description of capillary adhesion behavior.
- This research enhances understanding of micro/nanoscale interface interactions.
- Potential applications in micro- and nanotechnology are expanded.
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