Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures

Pestana, Luis Ruiz; Minnetian, Natalie; Lammers, Laura Nielsen; Head-Gordon, Teresa

doi:10.1039/C7SC03524A

Title: Dynamical inversion of the energy landscape promotes non-equilibrium self-assembly of binary mixtures

Journal Article · Mon Jan 01 00:00:00 EST 2018 · Chemical Science

DOI:https://doi.org/10.1039/C7SC03524A· OSTI ID:1416403

^[1]; Minnetian, Natalie ^[2]; Lammers, Laura Nielsen ^[3];

^[1]

Chemical Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, USA
Department of Chemistry, University of California, Berkeley, USA
Earth and Environmental Science Area, Lawrence Berkeley National Laboratory, University of California, Berkeley, USA

When driven out of equilibrium, many diverse systems can form complex spatial and dynamical patterns, even in the absence of attractive interactions. Using kinetic Monte Carlo simulations, we investigate the phase behavior of a binary system of particles of dissimilar size confined between semiflexible planar surfaces, in which the nanoconfinement introduces a non-local coupling between particles, which we model as an activation energy barrier to diffusion that decreases with the local fraction of the larger particle. The system autonomously reaches a cyclical non-equilibrium state characterized by the formation and dissolution of metastable micelle-like clusters with the small particles in the core and the large ones in the surrounding corona. The power spectrum of the fluctuations in the aggregation number exhibits 1/f noise reminiscent of self-organized critical systems. Finally, we suggest that the dynamical metastability of the micellar structures arises from an inversion of the energy landscape, in which the relaxation dynamics of one of the species induces a metastable phase for the other species.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1416403

Alternate ID(s):: OSTI ID: 1434007

Journal Information:: Chemical Science, Journal Name: Chemical Science Vol. 9 Journal Issue: 6; ISSN 2041-6520

Publisher:: Royal Society of Chemistry (RSC)Copyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 1 work

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