Depletion-driven four-phase coexistences in discotic systems

García, Álvaro González; Tuinier, Remco; Maring, Jasper V.; Opdam, Joeri; Wensink, H. H.; Lekkerkerker, H. N. W.

doi:10.1080/00268976.2018.1463471

Cited by 22 publications

(30 citation statements)

References 90 publications

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“…The intermediate polymer size of q ¼ 0.525 (middle panel) marks the exact size ratio where all three binodals coincide at the same polymer reservoir concentration. This leads to an I-N-SmA-AAA four-phase coexistence that is reminiscent of the predictions for the disk-polymer systems [39].…”

supporting

confidence: 60%

Defying the Gibbs Phase Rule: Evidence for an Entropy-Driven Quintuple Point in Colloid-Polymer Mixtures

Peters¹,

Vis²,

García³

et al. 2020

Phys. Rev. Lett.

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Using a minimal algebraic model for the thermodynamics of binary rod-polymer mixtures, we provide evidence for a quintuple phase equilibrium; an observation that seems to be at odds with the Gibbs phase rule for two-component systems. Our model is based on equations of state for the relevant liquid crystal phases that are in quantitative agreement with computer simulations. We argue that the appearance of a quintuple equilibrium, involving an isotropic fluid, a nematic and smectic liquid crystal, and two solid phases, can be reconciled with a generalized Gibbs phase rule in which the two intrinsic length scales of the athermal colloid-polymer mixture act as additional field variables.

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supporting

confidence: 60%

Defying the Gibbs Phase Rule: Evidence for an Entropy-Driven Quintuple Point in Colloid-Polymer Mixtures

Peters¹,

Vis²,

García³

et al. 2020

Phys. Rev. Lett.

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“…For the columnar liquid crystal phase of colloidal platelets an analytical scaling expression for the free energy was obtained from an extended cell theory [21,22] and the predicted phase behavior was found to agree well with computer simulation results. This expression also enabled the use of free volume theory to determine the phase behavior of mixtures of suspensions containing plates and nonadsorbing polymers [23]. Inspired by this approach, we aim to seek analytical free energy expressions for the smectic-A and crystal phases of rods from an extended cell theory and map out the complete phase diagram of rod suspensions.…”

Section: Introductionmentioning

confidence: 99%

Algebraic equations of state for the liquid crystalline phase behavior of hard rods

et al. 2020

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“…The depletant volume fraction is f d = (N d v d )/V, where N d is the number of depletants with volume v d in S. We consider depletants as penetrable hard spheres (PHSs): 30 they do not interact with each other but are hard for the discotics. Theoretically, we account for platelets as hard cylinders; 31 in simulations we consider oblate hard spherocylinders (OHSCs). 29,32 We apply free volume theory (FVT, 33 see ESI †) to discotic-depletant mixtures.…”

mentioning

confidence: 99%