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Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
Published on: April 12, 2018
Complete wetting of curved microscopic channels
Lorenzo Bruschi1, Giovanni Fois, Giampaolo Mistura
1Dipartimento di Fisica Galileo Galilei, Università di Padova, via Marzolo 8, 35131 Padova, Italy.
The Journal of Chemical Physics
|October 18, 2006
Summary
Argon film adsorption on microscopic nonlinear cusps shows a crossover in growth behavior, matching scaling theory predictions. Adsorption on concave channels suggests the formation of two menisci.
Area of Science:
- Physics
- Materials Science
- Surface Science
Background:
- Understanding thin film adsorption is crucial for materials science and nanotechnology.
- Geometric confinement significantly influences adsorption and dewetting phenomena.
Purpose of the Study:
- To investigate the adsorption behavior of argon films on patterned surfaces with microscopic nonlinear cusps and semicircular channels.
- To compare experimental results with existing scaling theories for thin film growth.
Main Methods:
- Experimental measurement of argon film adsorption.
- Utilizing arrays of microscopic nonlinear cusps and semicircular channels as substrates.
- Analysis of film growth behavior near liquid-vapor bulk coexistence.
Main Results:
- Observed a crossover from planar to geometry-dependent growth on nonlinear cusps.
- Measured a growth exponent chi = -0.96+/-0.04, agreeing with scaling theory.
- Found steeper growth on concave channels, indicating potential formation of two menisci.
Conclusions:
- Experimental adsorption data aligns well with theoretical predictions for confined geometries.
- The study provides insights into the role of surface topography in thin film adsorption.
- Observed phenomena on concave channels may offer new avenues for controlling film morphology.
