Experimental Evidence for Algebraic Double-Layer Forces
29 Dec 2019
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Stojimirovic Biljana
•
Vis Mark
•
Tuinier Remco
•
Philipse Albert P.
•
Trefalt Gregor
According to conventional wisdom electric double-layer forces normally decay
exponentially with separation distance. Here we present experimental evidence
of algebraically decaying double-layer interactions...We show that algebraic
interactions arise in both strongly overlapping as well as counterion-only
regimes, albeit the evidence is less clear for the former regime. In both of
these cases the disjoining pressure profile assumes an inverse square distance
dependence. At small separation distances another algebraic regime is
recovered. In this regime the pressure decays as the inverse of separation
distance.(read more)