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Article Dans Une Revue Physical Review Letters Année : 2020

Packing Polydisperse Colloids into Crystals: When Charge-Dispersity Matters

Résumé

Monte Carlo simulations, fully constrained by experimental parameters, are found to agree well with a measured phase diagram of aqueous dispersions of nanoparticles with a moderate size polydispersity over a broad range of salt concentrations, cs, and volume fractions, ϕ. Upon increasing ϕ, the colloids freeze first into coexisting compact solids then into a body centered cubic phase (bcc) before they melt into a glass forming liquid. The surprising stability of the bcc solid at high ϕ and cs is explained by the interaction (charge) polydispersity and vibrational entropy.
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Dates et versions

hal-03035380 , version 1 (08-12-2020)

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Guillaume Bareigts, Pree-Cha Kiatkirakajorn, Joaquim Li, Robert Botet, Michael Sztucki, et al.. Packing Polydisperse Colloids into Crystals: When Charge-Dispersity Matters. Physical Review Letters, 2020, 124 (5), ⟨10.1103/PhysRevLett.124.058003⟩. ⟨hal-03035380⟩
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