Elastic properties of bimesogenic liquid crystals

References

• Vorlander , D. 1923 . The exploration of the molecular shape with the help of the crystal Fl active . Z Phys Chem , 105 : 211
   Google Scholar
• Demus , D , Goodby , JW , Gray , GW , Speiss , H-W and Vill , V , eds. 1998 . Handbook of liquid crystals , Vol. 1 , Fundamentals , Weinheim : Wiley VCH .
   Google Scholar
• Cestari , M , Diez-Berart , S , Dunmur , DA , Ferrarini , A , de la Fuente , MR , Jackson , DJB , Lopez , DO , Luckhurst , GR , Perez-Jubindo , MA , Richardson , RM , Salud , J , Timimi , BA and Zimmermann , H. 2011 . Phase behavior and properties of the liquid-crystal dimer 1,7-bis(4-cyanobiphenyl-4′-yl) heptane: a twist-bend nematic liquid crystal . Phys Rev E , 84 : 031704
   PubMed Web of Science ®Google Scholar
• Dunmur , DA , Luckhurst , GR , de la Fuente , MR , Diez , S and Perez-Jubindo , MA. 2011 . Dielectric relaxation in liquid crystalline dimers . J Chem Phys , 115 : 8681
   Web of Science ®Google Scholar
• Harden , J , Mbanga , B , Eber , N , Fodor-Csorba , K , Sprunt , S , Gleeson , JT and Jakli , A. 2006 . Giant flexoelectricity of bent-core nematic liquid crystals . Phys Rev Lett , 97 : 157802
   PubMed Web of Science ®Google Scholar
• Sathyanarayana , P , Mathew , M , Li , Q , Sastry , VSS , Kundu , B , Le , KV , Takezoe , H and Dhara , S. 2011 . Splay bend elasticity of a bent-core nematic liquid crystal . Phys Rev E , 81 : 010702
   Web of Science ®Google Scholar
• Sathyanarayana , P , Sadashiva , BK and Dhara , S. 2011 . Splay-bend elasticity and rotational viscosity of liquid crystal mixtures of rod-like and bent-core molecules . Soft Matter , 7 : 8556
   Web of Science ®Google Scholar
• Imrie , CT and Henderson , PA. 2007 . Liquid crystal dimers and higher oligomers: between monomers and polymers . Chem Soc Rev , 36 : 2096
   PubMed Web of Science ®Google Scholar
• Henderson , PA and Imrie , CT. 2011 . Methylene-linked liquid crystal dimers and the twist-bend nematic phase . Liq Cryst , 38 : 1407 – 1414 .
   Web of Science ®Google Scholar
• Hogan , JL , Imrie , CT and Luckhurst , GR. 1988 . Asymmetric dimeric liquid crystals. The preparation and properties of the α-(4-cyanobiphenyl-4′-oxy)-ω-(4-n-alkylanilinebenzylidene-4′-oxy)hexanes . Liq Cryst , 3 : 645 – 650 .
   Web of Science ®Google Scholar
• Attard , GS , Date , RW , Imrie , CT , Luckhurst , GR , Roskilly , SJ , Seddon , JM and Taylor , L. 1994 . Non-symmetric dimeric liquid crystals. The preparation and properties of the α-(4-cyanobiphenyl-4′-yloxy)-ω-(4-n-alkylanilinebenzylidene-4′-oxy)alkanes . Liq Cryst , 16 : 529 – 581 .
   Web of Science ®Google Scholar
• Imrie , CT. 2006 . Non-symmetric liquid crystal dimers: how to make molecules intercalate . Liq Cryst , 33 : 1449 – 1454 .
   Web of Science ®Google Scholar
• Panov , VP , Nagaraj , M , Vij , JK , YP , Panarin , Kohlmeier , A , Tamba , MG , Lewis , RA and Mehl , GH. 2010 . Spontaneous periodic deformations in nonchiral planar-aligned bimesogens with a nematic-nematic transition and a negative elastic constant . Phys Rev Lett , 105 : 167801
   PubMed Web of Science ®Google Scholar
• Panov , VP , Balachandran , R , Nagaraj , M , Vij , JK , Tamba , MG , Kohlmeier , A and Mehl , GH. 2011 . Microsecond linear optical response in the unusual nematic phase of achiral bimesogens . Appl Phys Lett , 99 : 261903
   Web of Science ®Google Scholar
• Dozov , I. 2001 . On the spontaneous symmetry breaking in the mesophases of achiral banana-shaped molecules . Europhys Lett , 56 : 247
   Google Scholar
• Morris , SM , Clarke , MJ , Blatch , AE and Coles , HJ. 2007 . Structure – flexoelastic properties of bimesogenic liquid crystals. Phys Rev E , 75 : 041701
   Google Scholar
• Atkinson , KL , Morris , SM , Castles , F , Qasim , MM , Gardiner , DJ and Coles , HJ. 2012 . Flexoelectric and elastic coefficients of odd and even homologous bimesogens . Phys Rev E , 85 : 012701
   Web of Science ®Google Scholar
• Barbero , G and Evangelista , LR. 2000 . An elementary course on the continuum theory for nematic liquid crystals , Singapore : World Scientific .
   Google Scholar
• Kundu , B , Pratibha , R and Madhusudhana , NV. 2007 . Anomalous temperature dependence of elastic constants in the nematic phase of binary mixtures made of rodlike and bent-core molecules . Phys Rev Lett , 99 : 247802
   PubMed Web of Science ®Google Scholar
• Morris , SW , Palffy , P and Balzarini , DA. 1986 . Measurements of bend and splay constants of octyl – cyano biphenyl. Mol Cryst Liq Cryst , 139 : 263
   Web of Science ®Google Scholar
• Sathyanarayana , P , Jampani , V SR , Skarabot , M , Musevic , I , Le , KV , Takezoe , H and Dhara , S. 2012 . Viscoelasticity of ambient-temperature nematic binary mixtures of bent-core and rodlike molecules . Phys Rev E , 85 : 011702
   Web of Science ®Google Scholar
• Cestari , M , Frezza , E , Ferrarini , A and Luckhurst , GR. 2011 . Crucial role of molecular curvature for the bend elastic and flexoelectric properties of liquid crystals: mesogenic dimers as a case study . J Mater Chem , 21 : 12303
   Web of Science ®Google Scholar
• Mertelj , A , Čopič , M , Luckhurst , GR and Parri , O. Softening of the bend elastic constant in the nematic phase of flexible liquid crystal dimers causes the transition to a modulated nematic phase . Oral session presented at: 24th International Liquid Crystal Conference . Mainz , Germany. Aug 23
   Google Scholar
• Castles , F , Morris , SM , Terentjev , EM and Coles , HJ. 2010 . Thermodynamically stable blue phases . Phys Rev Lett , 104 : 157801
   PubMed Web of Science ®Google Scholar
• Coles , HJ , Clarke , MJ , Morris , SM , Broughton , BJ and Blatch , AE. 2006 . Strong flexoelectric behaviour in bimesogenic liquid crystals . J Appl Phys , 99 : 034104
   Web of Science ®Google Scholar
• Oswald , P and Pieranski , P. 2005 . Nematic and cholesteric liquid crystals: concepts and physical properties illustrated by experiment , Boca Raton , FL : CRC .
   Google Scholar
• Chen , GP , Takezoe , H and Fukuda , A. 1989 . Assessment of the method for determining the elastic constant ratios in nematics by angular dependence of scattered light intensity . Jpn J Appl Phys , 28 : 56 – 57 .
   Web of Science ®Google Scholar
• Dubtsov , AV , Pasechnik , SV , Shmeliova , DV , Tsvetkov , VA and Chigrinov , VG. 2009 . Special optical geometry for measuring twist elastic module K22 and rotational viscosity γ1 of nematic liquid crystals . Appl Phys Lett , 94 : 181910
   Web of Science ®Google Scholar
• Panov , VP , Balachandran , R , Vij , JK , Tamba , MG , Kohlmeier , A and Mehl , GH. 2012 . Field-induced periodic chiral pattern in the Nx phase of achiral bimesogens . Appl Phys Lett , 101 : 234106
   Web of Science ®Google Scholar
• Kaur , S. , Addis , J. , Greco , C. , Ferrarini , A. , Görtz , V. , Goodby , J. W. and Gleeson , H. F. Understanding the distinctive elastic constants in an oxadiazole bent-core liquid crystal , and Phys. Rev. E. 2012;86:041703.
   Google Scholar