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http://hdl.handle.net/2289/2341
Title: | On the occurrence of point and ring defects in the nematic-nematic coexistence range of a binary mixture of rod-like and disc-like mesogens |
Authors: | Pratibha, R. Madhusudana, N.V. |
Keywords: | point defects ring defects nematic-nematic coexistence |
Issue Date: | Jan-1990 |
Publisher: | Gordon and Breach Science Publishers. |
Citation: | Molecular Crystals and Liquid Crystals, 1990, Vol.178, p167-178 |
Abstract: | We report some observations on the director configurations in the coexistence range of two nematic phases, NR and ND in a binary mixture of rod-like and disc- like nematogens. The director alignment is continuous across the boundary of the NR and ND phases. Point defects of strength + 1 in NR droplets in an otherwise continuous ND medium are found to be annulled by singular ring disclinations of strength - 1/2 Further, the NR drops which orient homeotropically at the glass plates have a point defect of strength + 1 only if their size is less than about 7 b.mum. Larger drops have ring disclinations of strength + 1/2 instead of + 1 point defects. This changeover can be understood on the basis of simple energy considerations. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/2341 |
ISSN: | 1058-725X |
Alternative Location: | http://dx.doi.org/10.1080/00268949008042717 |
Copyright: | 1990 OPA (Overseas Publishers Association) N.V. |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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1990 MCLC V178 p167.pdf Restricted Access | Restricted Access | 1.18 MB | Adobe PDF | View/Open Request a copy |
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