Transformation between elastic dipoles, quadrupoles, octupoles, and hexadecapoles driven by surfactant self-assembly in nematic emulsion

Senyuk, Bohdan; Mozaffari, Ali; Crust, Kevin; Zhang, Rui; de Pablo, Juan J.; Smalyukh, Ivan I.

doi:10.1126/sciadv.abg0377

Title: Transformation between elastic dipoles, quadrupoles, octupoles, and hexadecapoles driven by surfactant self-assembly in nematic emulsion

Journal Article · Fri Jun 18 00:00:00 EDT 2021 · Science Advances

DOI:https://doi.org/10.1126/sciadv.abg0377· OSTI ID:1797625

^[1];

^[2]; Crust, Kevin ^[1]; Zhang, Rui ^[3];

^[4];

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Department of Physics and Soft Materials Research Center, University of Colorado, Boulder, CO 80309, USA.
Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637, USA.
Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637, USA., Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR.
Pritzker School of Molecular Engineering, The University of Chicago, Chicago, IL 60637, USA., Center for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439, USA.
Department of Physics and Soft Materials Research Center, University of Colorado, Boulder, CO 80309, USA., Department of Electrical, Computer, and Energy Engineering and Materials Science and Engineering Program, University of Colorado, Boulder, CO 80309, USA., Renewable and Sustainable Energy Institute, National Renewable Energy Laboratory and University of Colorado, Boulder, CO 80309, USA.

Emulsions comprising isotropic fluid drops within a nematic host are of interest for applications ranging from biodetection to smart windows, which rely on changes of molecular alignment structures around the drops in response to chemical, thermal, electric and other stimuli. We show that absorption or desorption of trace amounts of common surfactants can drive continuous transformations of elastic multipoles induced by the droplets within the uniformly aligned nematic host. Out-of-equilibrium dynamics of director structures emerge from a controlled self-assembly or desorption of different surfactants at the drop-nematic interfaces, with ensuing forward and reverse transformations between elastic dipoles, quadrupoles, octupoles and hexadecapoles. We characterize inter-transformations of droplet-induced surface and bulk defects, probe elastic pair interactions and discuss emergent prospects for fundamental science and applications of the reconfigurable nematic emulsions.

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Research Organization:: Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: SC0019293; SC0019762

OSTI ID:: 1797625

Alternate ID(s):: OSTI ID: 1815413; OSTI ID: 1832168

Journal Information:: Science Advances, Journal Name: Science Advances Vol. 7 Journal Issue: 25; ISSN 2375-2548

Publisher:: American Association for the Advancement of Science (AAAS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Transformation between elastic dipoles, quadrupoles, octupoles, and hexadecapoles driven by surfactant self-assembly in nematic emulsion

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