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Optical and X-ray scattering studies of the electric field-induced orientational order in colloidal suspensions of pigment nanorods

Buluy, Oleksandr; Aryasova, Natalie; Tereshchenko, Oleksandr; Kurioz, Yuriy; Nazarenko, Vassili; Eremin, Alexey; Stannarius, Ralf; Klein, Susanne; Goldmann, Claire; Davidson, Patrick; Dozov, Ivan; Reznikov, Yuriy

Optical and X-ray scattering studies of the electric field-induced orientational order in colloidal suspensions of pigment nanorods Thumbnail


Authors

Oleksandr Buluy

Natalie Aryasova

Oleksandr Tereshchenko

Yuriy Kurioz

Vassili Nazarenko

Alexey Eremin

Ralf Stannarius

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Dr Susanne Klein Susanne.Klein@uwe.ac.uk
Associate Professor in EPSRC Manufacturing Fellow

Claire Goldmann

Patrick Davidson

Ivan Dozov

Yuriy Reznikov



Abstract

© 2018 Elsevier B.V. Under pulsed or a.c. electric fields, colloidal suspensions of nanorods can show strong electro-optic effects, such as the Kerr effect, with fast response times (a few ms), which makes them good candidates for some commercial applications. For this purpose, suspensions of Pigment red 176 nanorods in dodecane were recently developed and their physical properties have been studied. We report here on the investigation of the orientational order induced by electric fields in isotropic suspensions of pigment nanorods by three different techniques: transient electric birefringence, transient electric dichroism, and in-situ small-angle X-ray scattering under electric field (“Electro-SAXS”). We show that, in spite of the apolar character of the solvent, the Maxwell-Wagner-O'Konski mechanism (i.e. the polarization of the counter-ion cloud around each particle) is responsible for the field-induced alignment of the nanorods. Although the particles are only weakly charged and the dielectric constant of dodecane is low, the pigment nanorods effectively behave as metallic particles in an insulating matrix and reach strong values (S ~0.5) of the induced nematic order parameter at moderate field amplitudes (~1 V/μm). This study confirms the feasibility of using suspensions of Pigment red 176 nanorods in dodecane for electro-optic applications.

Citation

Buluy, O., Aryasova, N., Tereshchenko, O., Kurioz, Y., Nazarenko, V., Eremin, A., …Reznikov, Y. (2018). Optical and X-ray scattering studies of the electric field-induced orientational order in colloidal suspensions of pigment nanorods. Journal of Molecular Liquids, 267, 286-296. https://doi.org/10.1016/j.molliq.2018.02.003

Journal Article Type Article
Acceptance Date Feb 1, 2018
Online Publication Date Feb 2, 2018
Publication Date Oct 1, 2018
Deposit Date Feb 23, 2018
Publicly Available Date Mar 28, 2024
Journal Journal of Molecular Liquids
Print ISSN 0167-7322
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 267
Pages 286-296
DOI https://doi.org/10.1016/j.molliq.2018.02.003
Keywords transient electric birefringence, transient electric dichroism, colloids, nanorods, field-induced order
Public URL https://uwe-repository.worktribe.com/output/859319
Publisher URL https://doi.org/10.1016/j.molliq.2018.02.003
Additional Information Additional Information : This is the author's accepted manuscript. The final published version is available here: https://doi.org/10.1016/j.molliq.2018.02.003.

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