dc.contributor.author | NAGARAJ, MAMATHA | en |
dc.contributor.author | VIJ, JAGDISH | en |
dc.date.accessioned | 2012-01-17T17:02:44Z | |
dc.date.available | 2012-01-17T17:02:44Z | |
dc.date.issued | 2010 | en |
dc.date.submitted | 2010 | en |
dc.identifier.citation | M. Nagaraj, K. Merkel, J. K. Vij, and A. Kocot, Macroscopic biaxiality and electric-field induced rotation of the minor director in the nematic phase of a bent-core liquid crystal, Europhysics Letters (EPL), 91, 66002, 2010, 1-6 | en |
dc.identifier.other | Y | en |
dc.identifier.uri | http://hdl.handle.net/2262/61733 | |
dc.description | PUBLISHED | en |
dc.description.abstract | Biaxiality in the nematic phase has been investigated for the bent-core liquid-crystal para-heptylbenzoate diester, using polarised IR spectroscopy. Anisotropic fluctuations of the nematic director are discussed in terms of the self-assembly of the chiral conformers. The ordering of the minor director for the homeotropicaly aligned sample is found to depend on the rubbing of the substrates of the cell and the amplitude of in-plane electric field. On increasing the in-plane electric field, the rotation of the minor director in the plane of the substrate is observed with an angle of approximately 45?, where initially the minor director is shown to lie along the rubbing direction. It is also shown that on the average the long axis of the molecules is normal to the substrate with surface treatment, with and without rubbing. The electric in-plane field combined with rubbing is shown to induce biaxial order in the nematic phase of a material with negative dielectic anisotropy for the first time. | en |
dc.description.sponsorship | This work was supported by SFI grants (07/W.1/I1833 and 06/RFP/ENE039). KM and AK acknowledge the support of PMSIT - grant N202 282734. AK thanks the Science Foundation of Ireland for the award of Walton Professorship. The authors thank E. T. Samulski and T. J. Dingemans for supplying the sample. | en |
dc.format.extent | 1-6 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Europhysics Letters (EPL) | en |
dc.relation.ispartofseries | 91 | en |
dc.relation.ispartofseries | 66002 | en |
dc.rights | Y | en |
dc.subject | Condensed matter physics | en |
dc.subject | Biaxiality | en |
dc.title | Macroscopic biaxiality and electric-field-induced rotation of the minor director in the nematic phase of a bent-core liquid crystal | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/jvij | en |
dc.identifier.rssinternalid | 76990 | en |
dc.subject.TCDTheme | Nanoscience & Materials | en |
dc.identifier.rssuri | http://dx.doi.org/10.1209/0295-5075/91/66002 | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | 07/W.1/I1833 | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | 06/RFP/ENE039 | en |