skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Biaxial ferromagnetic liquid crystal colloids

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1321027
Grant/Contract Number:
ER46921
Resource Type:
Journal Article: Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 38; Related Information: CHORUS Timestamp: 2017-06-24 18:07:05; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Country of Publication:
United States
Language:
English

Citation Formats

Liu, Qingkun, Ackerman, Paul J., Lubensky, Tom C., and Smalyukh, Ivan I. Biaxial ferromagnetic liquid crystal colloids. United States: N. p., 2016. Web. doi:10.1073/pnas.1601235113.
Liu, Qingkun, Ackerman, Paul J., Lubensky, Tom C., & Smalyukh, Ivan I. Biaxial ferromagnetic liquid crystal colloids. United States. doi:10.1073/pnas.1601235113.
Liu, Qingkun, Ackerman, Paul J., Lubensky, Tom C., and Smalyukh, Ivan I. 2016. "Biaxial ferromagnetic liquid crystal colloids". United States. doi:10.1073/pnas.1601235113.
@article{osti_1321027,
title = {Biaxial ferromagnetic liquid crystal colloids},
author = {Liu, Qingkun and Ackerman, Paul J. and Lubensky, Tom C. and Smalyukh, Ivan I.},
abstractNote = {},
doi = {10.1073/pnas.1601235113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 38,
volume = 113,
place = {United States},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1073/pnas.1601235113

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

Save / Share:
  • X-ray diffraction is one of the most definitive methods to determine the structure of condensed matter phases, and it has been applied to unequivocally infer the structures of conventional calamitic and lyotropic liquid crystals. With the advent of bent-core and tetrapodic mesogens and the discovery of the biaxial nematic phase in them, the experimental results require more careful interpretation and analysis. Here, we present ab-initio calculations of X-ray diffraction patterns in the isotropic, uniaxial nematic, and biaxial nematic phases of bent-core mesogens. A simple Meier-Saupe-like molecular distribution function is employed to describe both aligned and unaligned mesophases. The distribution functionmore » is decomposed into two, polar and azimuthal, distribution functions to calculate the effect of the evolution of uniaxial and biaxial nematic orientational order. The calculations provide satisfactory semiquantitative interpretations of experimental results. The calculations presented here should provide a pathway to more refined and quantitative analysis of X-ray diffraction data from the biaxial nematic phase.« less
  • Ferrofluids are familiar as colloidal suspensions of ferromagnetic nanoparticles in aqueous or organic solvents. The dispersed particles are randomly oriented but their moments become aligned if a magnetic field is applied, producing a variety of exotic and useful magnetomechanical effects. A longstanding interest and challenge has been to make such suspensions macroscopically ferromagnetic, that is having uniform magnetic alignment in the absence of a field. Here we report a fluid suspension of magnetic nanoplates that spontaneously aligns into an equilibrium nematic liquid crystal phase that is also macroscopically ferromagnetic. We find Its zero-field magnetization produces distinctive magnetic self-interaction effects, includingmore » liquid crystal textures of fluid block domains arranged in closed flux loops, and makes this phase highly sensitive, with it dramatically changing shape even in the Earth’s magnetic field.« less