Title:	Periodic Grating-like Patterns Induced by Self-Assembly of Gelator Fibres in Nematic Gels
Authors:	Topnani, Neha B. Prutha, N. Pratibha, R.
Issue Date:	2018
Publisher:	Wiley-VCH Verlag GmbH
Citation:	ChemPhysChem, 2018, Vol. 19, p1471– 1475
Abstract:	Periodic orientation patterns occurring in nematic gels, revealed by optical and scanning electron microscopy, are found to be formed by spontaneous self-assembly of fibrous aggregates of a low-molecular-weight organogelator in an aligned thermotropic liquid crystal (LC). Self-organization into periodic structures is also reflected in a calorimetric study, which shows the occurrence of three thermoreversible states, namely, isotropic liquid, nematic and nematic gel. The segregation and self-assembly of the fibrous aggregates leading to pattern formation are attributed to the highly polar LC and to hydrogen bonding between gelator molecules, as shown by X-ray diffraction and vibrational spectroscopy. This study aims to investigate in detail the effect of the chemical nature and alignment of an anisotropic solvent on the morphology of the gelator fibres and the resulting gelation process. The periodic organization of LC-rich and fibre-rich regions can also provide a way to obtain templates for positioning nanoparticle arrays in an LC matrix, which can lead to novel devices.
Description:	Restricted Access
URI:	http://hdl.handle.net/2289/6955
ISSN:	1439-4235 1439-7641 (Online)
Alternative Location:	https://doi.org/10.1002/cphc.201800057
Copyright:	2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional information:	Supporting Information for this article is available
Appears in Collections:	Research Papers (SCM)

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