Packing polydisperse colloids into crystals: when charge-dispersity matters

Bareigts, G., Kiatkirakajorn, P.-C., Li, J., Botet, R., Sztucki, M., Cabane, B., Goehring, L. ORCID: 0000-0002-3858-7295 and Labbez, C., 2020. Packing polydisperse colloids into crystals: when charge-dispersity matters. Physical Review Letters, 124 (5): 058003. ISSN 0031-9007

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Abstract

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 and volume fractions. Upon increasing volume fraction 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 volume fractions and salt concentrations is explained by the interaction (charge) polydispersity and vibrational entropy.

Item Type: Journal article
Publication Title: Physical Review Letters
Creators: Bareigts, G., Kiatkirakajorn, P.-C., Li, J., Botet, R., Sztucki, M., Cabane, B., Goehring, L. and Labbez, C.
Publisher: American Physical Society (APS)
Date: 5 February 2020
Volume: 124
Number: 5
ISSN: 0031-9007
Identifiers:
NumberType
10.1103/physrevlett.124.058003DOI
1290593Other
Rights: © 2020 American Physical Society.
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 11 Feb 2020 11:00
Last Modified: 11 Feb 2020 11:00
URI: http://irep.ntu.ac.uk/id/eprint/39194

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