Nano Structured Solid Surfaces

Bubble Detachment on Micro/Nano Structured Solid Surfaces in Energy Applications ... bubbles are critical process in many energy applications ...
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Bubble Detachment on Micro/Nano Structured Solid Surfaces in Energy Applications Sung Kwon Cho, Univ. of Pittsburgh Chang‐Hwan Choi, Stevens Institute of Technology Motivation:  Detachment/removal of  bubbles are critical process in  many energy applications 

Fuel Cells

Method/Achievement: Using two‐mirror interference  lithography, uniform arrays of nanostructures are  fabricated over the entire area of 4’’ wafer. 

Boiling

Key idea: Nanostructured surfaces will  significantly reduce the adhesion  between the bubbles and surface Fa = πd1γ sin θ

Fa = πd2γ sin φ

 ƒ–‡” Gas bubble

Low adhesion γ