Cryo-TEM studies of two smectic phases of an asymmetric bent-core material

References

• Sekine T, Niori T, Watanabe J, Furukawa T, Takezoe H. Distinct ferroelectric smectic liquid crystals consisting of banana shaped achiral molecules. J Mater Chem. 1996;6:1231–1233.
   Web of Science ®Google Scholar
• Link DR, Natale G, Shao R, Maclennan JE, Clark NA, Körblova E, Walba DM. Spontaneous formation of macroscopic chiral domains in a fluid smectic phase of achiral molecules. Science. 1997;278:1924–1927.
   PubMed Web of Science ®Google Scholar
• Pelzl G, Diele S, Jákli A, Weissflog W, Lischka C, Wirth I. Preliminary communication helical superstructures in a novel smectic mesophase formed by achiral banana-shaped molecules. Liq Cryst. 2006;33:1513–1523.
   Web of Science ®Google Scholar
• Jákli A, Lischka C, Weissflog W, Pelzl G, Saupe A. Helical filamentary growth in liquid crystals consisting of banana-shaped molecules. Liq Cryst. 2000;27:1405–1409.
   Web of Science ®Google Scholar
• Coleman DA, Fernsler J, Chattham N, Nakata M, Takanishi Y, Korblova E, Link DR, Shao R, Jang WG, Maclennan JE, Boyer C, Weissflog W, Pelzl G, Chien L-C, Zasadzinski J, Watanabe J, Walba DM, Takezoe H, Clark NA. Polarization-modulated smectic liquid crystal phases. Science. 2003;301:1204–1211.
   PubMed Web of Science ®Google Scholar
• Folcia C, Etxebarria J, Ortega J, Ros M. Structure of mesogens possessing B7 textures: the case of the bent-core mesogen 8-OPIMB-NO2. Phys Rev E. 2005;72:417091–417095.
   Web of Science ®Google Scholar
• Folcia CL, Alonso I, Ortega J, Etxebarria J, Pintre I, Ros MB, Paı U. Achiral bent-core liquid crystals with azo and azoxy linkages: structural and nonlinear optical properties and photoisomerization. Chem Mater. 2006;18:4617–4626.
   Web of Science ®Google Scholar
• Pelzl G, Schroder MW, Dunemann U, Diele S, Weissflog W, Jones C, Coleman D, Clark NA, Stannarius R, Li J, Das B, Grande S. The first bent-core mesogens exhibiting a dimorphism B7–SmCPA. J Mater Chem. 2004;14:2492–2498.
   Web of Science ®Google Scholar
• Vaupotič N, Čopič M, Gorecka E, Pociecha D. Modulated structures in bent-core liquid crystals: two faces of one phase. Phys Rev Lett. 2007;98:247802–247804.
   PubMed Web of Science ®Google Scholar
• Gorecka E, Pociecha D, Vaupotič N, Čepič M, Gomola K, Mieczkowski J. Modulated general tilt structures in bent-core liquid crystals. J Mater Chem. 2008;18:3044–3049.
   Web of Science ®Google Scholar
• Pociecha D, Vaupotič N, Gorecka E, Mieczkowski J, Gomola K, Čepič M. 2-D density-modulated structures in asymmetric bent-core liquid crystals. J Mater Chem. 2008;18:881–889.
   Web of Science ®Google Scholar
• Vaupotič N, Pociecha D, Čepič M, Gomola K, Mieczkowski J, Gorecka E. Evidence for general tilt columnar liquid crystalline phase. Soft Matter. 2009;5:2281–2287.
   Web of Science ®Google Scholar
• Chen W-H, Chuang W-T, Jeng U-S, Sheu H-S, Lin H-C. New SmCG phases in a hydrogen-bonded bent-core liquid crystal featuring a branched siloxane terminal group. J Am Chem Soc. 2011;133:15674–15685.
   PubMed Web of Science ®Google Scholar
• Bailey C, Jákli A. Role of molecular shape on bent-core liquid-crystal structures. Phys Rev Lett. 2007;99:207801–207804.
   PubMed Web of Science ®Google Scholar
• Szydlowska J, Mieczkowski J, Matraszek J, Bruce DW, Gorecka E, Pociecha D, Guillon D. Bent-core liquid crystals forming two- and three-dimensional modulated structures. Phys Rev E. 2003;67:31702–31705.
   Web of Science ®Google Scholar
• Vaupotič N, Čopič M. Polarization modulation instability in liquid crystals with spontaneous chiral symmetry breaking. Phys Rev E. 2005;72:31701–317015.
   Web of Science ®Google Scholar
• Zhu C, Shao R, Reddy RA, Chen D, Shen Y, Gong T, Glaser MA, Korblova ED, Rudquist P, Maclennan JE, Walba DM, Clark NA. Topological ferroelectric bistability in a polarization-modulated orthogonal smectic liquid crystal. J Am Chem Soc. 2012;134:9681–9687.
   PubMed Web of Science ®Google Scholar
• Zhang C, Diorio N, Radhika S, Sadashiva BK, Sprunt SN, Jákli A. Two distinct modulated layer structures of an asymmetric bent-shape smectic liquid crystal. Liq Cryst. 2012;39:1149–1157.
   Web of Science ®Google Scholar
• Zhang C, Gao M, Diorio NJ, Weissflog W, Baumeister U, Sprunt SN, Gleeson TJ, Jákli A. Direct observation of smectic layers in thermotropic liquid crystals. Phys Rev Lett. 2012;109:107802–107805.
   PubMed Web of Science ®Google Scholar
• Kleman M, Lavrentovich OD, Nastishin YA. Dislocations and disclinations in mesomorphic phases. In: Nabarro FR, Hirth JP, editors. Dislocations in solids, Vol. 12, 1st ed. Amsterdam: Elsevier; 2004. p. 149–271.
   Google Scholar
• Kleman M. Screw dislocations and minima surfaces in a smectics. Philos Mag. 1976;34:79–87.
   Web of Science ®Google Scholar
• Meyer C, Logbo H, Briouel B, Picot J-C, Nastishin YA, Kleman M. Double helical defects in smectic A and smectic A* phases. Liq Cryst. 2010;37:1047–1057.
   Web of Science ®Google Scholar
• Pleiner H. Structure of the core of a screw dislocation in smectic-A liquid-crystals. Liq Cryst. 1986;1:197–201.
   Web of Science ®Google Scholar
• Pleiner H. Energetics of screw dislocations in smectic-A liquid-crystals. Liq Cryst. 1988;3:249–258.
   Web of Science ®Google Scholar
• Moreau P, Navailles L, Giermanska-Kahn J, Mondain-Monval O, Nallet F, Roux D. Dislocation-loop-mediated smectic melting. Europhys Lett. 2006;73:49–54.
   Google Scholar
• Chen D, Heberling M-S, Nakata M, Hough LE, Maclennan JE, Glaser MA, Korblova E, Walba DM, Watanabe J, Clark NA. Structure of the B4 liquid crystal phase near a glass surface. Chemphyschem. 2012;13:155–159.
   PubMed Web of Science ®Google Scholar
• Zhang C, Gao M, Diorio N, Weissflog W, Baumeister U, Sprunt SN, Gleeson JT, Jákli A. Direct observation of smectic layers in thermotropic liquid crystals. In: 24th International Liquid Crystal Conference; 2012 August 19–24; Mainz, Germany.
   Google Scholar
• Kléman M, Williams CE, Costello MJ, Gulik-Krzywicki T, Kleman M, Gulikkrzywicki T. Defect structures in lyotropic smectic phases revealed by freeze-fracture electron-microscopy. Philos Mag. 1977;35:33–56.
   Web of Science ®Google Scholar
• Ihn KJK, Zasadzinski JAN, Pindak R, Slaney AJA, Goodby JW. Observations of the liquid-crystal analog of the Abrikosov phase. Science. 1992;258:275–278.
   PubMed Web of Science ®Google Scholar
• Lelidis I, Blanc C, Kleman M. Optical and confocal microscopy observations of screw dislocations in smectic-A liquid crystals. Phys Rev E. 2006;74:51710–517105.
   Web of Science ®Google Scholar
• Meyer RB, Stebler B, Lagerwall ST. Observation of edge dislocations in smectic liquid crystals. Phys Rev Lett. 1978;41:1393–1396.
   Web of Science ®Google Scholar
• Williams CE, Kleman M. Observation of edge dislocation lines in an A-phase smectic. J Phys Lett. 1974;35:L33–L35.
   Google Scholar
• Iwashita Y, Tanaka H. Pattern evolution of an edge-dislocation array in a lyotropic lamellar phase confined in a wedge-shaped cell: defect formation, relaxation, and recombination. Phys Rev E. 2008;77:417061–417065.
   Web of Science ®Google Scholar
• Chan WK, Webb WW. Observation of elementary edge dislocations in phospholipid multilayers and of their annealing as a determination of the permeation coefficient. J Phys1981;42:1007–1013.
   Web of Science ®Google Scholar
• Kleman M, Lavrentovich OD. Soft matter physics: an introduction. New York (NY): Springer; 2003. p. 638.
   Google Scholar
• de Gennes PG. No ti. Comptes Rendu Acad. Sci. Paris. 1972;275B:939–944.
   Google Scholar
• Brener EA, Marchenko VI. Nonlinear theory of dislocations in smectic crystals: an exact solution. Phys Rev E. 1999;59:R4752–R4753.
   PubMed Web of Science ®Google Scholar
• Santangelo C, Kamien R. Bogomol’nyi, Prasad, and Sommerfield configurations in smectics. Phys Rev Lett. 2003;91:455061–455064.
   Web of Science ®Google Scholar
• Ishikawa T, Lavrentovich OD. Dislocation profile in cholesteric finger texture. Phys Rev. E. 1999;60:R5037–R5039.
   PubMed Web of Science ®Google Scholar