Lan Dang - Academia.edu (original) (raw)
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Papers by Lan Dang
Physical Review Letters, 2009
A novel instrument allows for the first time measurements of the lateral adhesion forces at a sol... more A novel instrument allows for the first time measurements of the lateral adhesion forces at a solid-liquid interface, f k , in a way that is decoupled from the normal forces, f ?. We use it to measure how f k between a drop and a surface is influenced by different f ? and different histories of drop resting periods on the surface prior to sliding, t rest. The variation of f k with t rest is similar for different f ? and always plateaus as t rest ! 1. We show that the f k plateau value is higher when f ? is lower. This seemingly counterintuitive result is in agreement with recent theories.
Physical Review Letters, 2009
A novel instrument allows for the first time measurements of the lateral adhesion forces at a sol... more A novel instrument allows for the first time measurements of the lateral adhesion forces at a solid-liquid interface, f k , in a way that is decoupled from the normal forces, f ?. We use it to measure how f k between a drop and a surface is influenced by different f ? and different histories of drop resting periods on the surface prior to sliding, t rest. The variation of f k with t rest is similar for different f ? and always plateaus as t rest ! 1. We show that the f k plateau value is higher when f ? is lower. This seemingly counterintuitive result is in agreement with recent theories.