Liquid-Liquid Phase Transitions in Tetrahedrally Coordinated Fluids via Wertheim Theory

Frank Smallenburg, Laura Filion, Francesco Sciortino

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Network interpenetration has been proposed as a mechanism for generating liquid-liquid phase transitions in one component systems. We introduce a model of four coordinated particles, which explicitly treats the system as a mixture of two interacting interpenetrating networks that can freely exchange particles. This model can be solved within Wertheim's theory for associating fluids and shows liquid-liquid phase separations (in addition to the gas-liquid) for a wide range of model parameters. We find that originating a liquid-liquid transition requires a small degree of interpenetrability and a preference for intranetwork bonding. Physically, these requirements can be seen as controlling the softness of the particle-particle interaction and the bond flexibility, in full agreement with recent findings [Smallenburg, F.; Filion, L.; Sciortino, F. Nat. Phys. 2014, 10, 653].

Original languageEnglish
JournalJournal of Physical Chemistry. B
DOIs
Publication statusPublished - 10 Nov 2014

Fingerprint

Dive into the research topics of 'Liquid-Liquid Phase Transitions in Tetrahedrally Coordinated Fluids via Wertheim Theory'. Together they form a unique fingerprint.

Cite this