Impact of single-particle compressibility on the fluid-solid phase transition for ionic microgel suspensions.
作者： M Pelaez-Fernandez , Anton Souslov , LA Lyon , Paul M Goldbart , A Fernandez-Nieves
DOI: 10.1103/PHYSREVLETT.114.098303
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摘要: We study ionic microgel suspensions composed of swollen particles for various single-particle stiffnesses. measure the osmotic pressure π these and show that it is dominated by contribution free ions in solution. As this depends on volume fraction suspension ϕ, we can determine ϕ from π, even at fractions so high are compressed. find width fluid-solid phase coexistence, measured using larger than its hard-sphere value stiffer microgels progressively decreases softer microgels. For sufficiently soft microgels, fluidlike, irrespective fraction. By calculating dependence mean a particle, behavior phase-coexistence correlates with whether or not compressed corresponding to coexistence.
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