Reversible switching of liquid crystalline order permits synthesis of homogeneous populations of dipolar patchy microparticles
Abstract
The spontaneous positioning of colloids on the surfaces of micrometer-sized liquid crystal (LC) droplets and their subsequent polymerization offers the basis of a general and facile method for the synthesis of patchy microparticles. The existence of multiple local energetic minima, however, can generate kinetic traps for colloids on the surfaces of the LC droplets and result in heterogeneous populations of patchy microparticles. To address this issue, in this paper it is demonstrated that adsorbate-driven switching of the internal configurations of LC droplets can be used to sweep colloids to a single location on the LC droplet surfaces, thus resulting in the synthesis of homogeneous populations of patchy microparticles. The surface-driven switching of the LC can be triggered by addition of surfactant or salts, and permits the synthesis of dipolar microparticles as well as “Janus-like” microparticles. Finally, by using magnetic colloids, the utility of the approach is illustrated by synthesizing magnetically responsive patchy microdroplets of LC with either dipolar or quadrupolar symmetry that exhibit distinct optical responses upon application of an external magnetic field.
- Authors:
-
- Univ. of Wisconsin, Madison, WI (United States)
- Univ. of Chicago, Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Univ. of Wisconsin, Madison, WI (United States); Univ. of Chicago, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1342523
- Grant/Contract Number:
- SC0004025
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Volume: 24; Journal Issue: 39; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; patchy microparticles; liquid crystal microdroplets; surfactants; ordering transitions; polymerization
Citation Formats
Wang, Xiaoguang, Miller, Daniel S., de Pablo, Juan J., and Abbott, Nicholas L. Reversible switching of liquid crystalline order permits synthesis of homogeneous populations of dipolar patchy microparticles. United States: N. p., 2014.
Web. doi:10.1002/adfm.201400911.
Wang, Xiaoguang, Miller, Daniel S., de Pablo, Juan J., & Abbott, Nicholas L. Reversible switching of liquid crystalline order permits synthesis of homogeneous populations of dipolar patchy microparticles. United States. https://doi.org/10.1002/adfm.201400911
Wang, Xiaoguang, Miller, Daniel S., de Pablo, Juan J., and Abbott, Nicholas L. Fri .
"Reversible switching of liquid crystalline order permits synthesis of homogeneous populations of dipolar patchy microparticles". United States. https://doi.org/10.1002/adfm.201400911. https://www.osti.gov/servlets/purl/1342523.
@article{osti_1342523,
title = {Reversible switching of liquid crystalline order permits synthesis of homogeneous populations of dipolar patchy microparticles},
author = {Wang, Xiaoguang and Miller, Daniel S. and de Pablo, Juan J. and Abbott, Nicholas L.},
abstractNote = {The spontaneous positioning of colloids on the surfaces of micrometer-sized liquid crystal (LC) droplets and their subsequent polymerization offers the basis of a general and facile method for the synthesis of patchy microparticles. The existence of multiple local energetic minima, however, can generate kinetic traps for colloids on the surfaces of the LC droplets and result in heterogeneous populations of patchy microparticles. To address this issue, in this paper it is demonstrated that adsorbate-driven switching of the internal configurations of LC droplets can be used to sweep colloids to a single location on the LC droplet surfaces, thus resulting in the synthesis of homogeneous populations of patchy microparticles. The surface-driven switching of the LC can be triggered by addition of surfactant or salts, and permits the synthesis of dipolar microparticles as well as “Janus-like” microparticles. Finally, by using magnetic colloids, the utility of the approach is illustrated by synthesizing magnetically responsive patchy microdroplets of LC with either dipolar or quadrupolar symmetry that exhibit distinct optical responses upon application of an external magnetic field.},
doi = {10.1002/adfm.201400911},
journal = {Advanced Functional Materials},
number = 39,
volume = 24,
place = {United States},
year = {Fri Aug 15 00:00:00 EDT 2014},
month = {Fri Aug 15 00:00:00 EDT 2014}
}
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