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Issue 12, 2016
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Director orientations in lyotropic liquid crystals: diffusion MRI mapping of the Saupe order tensor

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Abstract

The macroscopic physical properties of a liquid crystalline material depend on both the properties of the individual crystallites and the details of their spatial arrangement. We propose a diffusion MRI method to estimate the director orientations of a lyotropic liquid crystal as a spatially resolved field of Saupe order tensors. The method relies on varying the shape of the diffusion-encoding tensor to disentangle the effects of voxel-scale director orientational order and the local diffusion anisotropy of the solvent. Proof-of-concept experiments are performed on water in lamellar and reverse hexagonal liquid crystalline systems with intricate patterns of director orientations.

Graphical abstract: Director orientations in lyotropic liquid crystals: diffusion MRI mapping of the Saupe order tensor

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Publication details

The article was received on 24 Nov 2015, accepted on 24 Feb 2016 and first published on 07 Mar 2016


Article type: Paper
DOI: 10.1039/C5CP07251D
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Citation: Phys. Chem. Chem. Phys., 2016,18, 8545-8553
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    Director orientations in lyotropic liquid crystals: diffusion MRI mapping of the Saupe order tensor

    D. Topgaard, Phys. Chem. Chem. Phys., 2016, 18, 8545
    DOI: 10.1039/C5CP07251D

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