Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2010-03-19
2011-10-11
Dougherty, Thomas (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S311000
Reexamination Certificate
active
08035279
ABSTRACT:
There are provided methods for creating energy conversion devices based on the giant flexoelectric effect in non-calamitic liquid crystals. By preparing a substance comprising at least one type of non-calamitic liquid crystal molecules and stabilizing the substance to form a mechanically flexible material, flexible conductive electrodes may be applied to the material to create an electro-mechanical energy conversion device which relies on the giant flexoelectric effect to produce electrical and/or mechanical energy that is usable in such applications as, for example, power sources, energy dissipation, sensors/transducers, and actuators.
REFERENCES:
patent: 4589733 (1986-05-01), Yaniv et al.
patent: 5245512 (1993-09-01), Rounds
patent: 5315419 (1994-05-01), Saupe et al.
patent: 5359253 (1994-10-01), Hikmet
patent: 5612387 (1997-03-01), Ogawa
patent: 6249332 (2001-06-01), Bryan-Brown et al.
patent: 7229663 (2007-06-01), Stephenson et al.
patent: 7832093 (2010-11-01), Jakli et al.
Wirth I. et al., “New variants of polymorphism in banana-shaped mesogens with cyano-substituted central core,” J. Mater. Chem., 11, 1642-1650 (2001).
Weissflog, W. et al., “Influence of lateral substituents on the mesophase behaviour of banana-shaped mesogens,” J. Mater. Chem., 11, 2748-2758 (2001).
Harden, J. et al., “Giant flexoelectricity of bent-core nematic liquid crystals,” Phys. Rev. Lett., 97, 157802-1-4, (2006).
Richards, C. D. et al., “Efficiency of energy conversion for devices containing a piezoelectric component,” Micromech. Microeng., 14, 717-721 (2004).
Warrier, S. et al., An AC Electrooptic Technique for Measuring the Flexoelectric Coefficient (ei + e3) and Anchoring Energies of Nematics, J. Phys. II (France), 7, 1789 (1997).
Blinov, L. M. et al., “Separate measurements of the flexoelectric and surface polarization in a model nematic liquid crystal p-methoxybenzylidene-p8-butylaniline: Validity of the quadrupolar approach,” Phys. Rev. E., 64, 031707 (2001).
Wiant, D. B. et al., “Non-Standard Electroconvection in a Bent Core Nematic,” Phys. Rev. E., 72, 041712 (2005).
Wiant, D.B. et al., “Critical behavior at the isotropic to nematic phase transition in a bent-core liquid crystal,” Phys. Rev. E., 73, 030703 (R) (2006).
Fodor-Csorba, K. et al., “Ester-Type Banana-Shaped Monomers and Investigations of Their Electro-Optical Properties,” Macromol. Chem. Phys., 203, 1556 (2002).
Mazzulla, A. et al., “Optical determination of flexoelectric coefficients and surface polarization in a hybrid aligned nematic cell,” Phys. Rev. E., 64, 021708 (2001).
Meyer, R. B., “Piezoelectric effects in liquid crystals,” Phys. Rev. Lett., 22, 918-921 (1969).
Matraszek, J. et al., “Nematic phase formed by banana-shaped molecules,” Liq. Cryst., 27, 429-436 (2000).
Matyus, E. “Synthesis, characterization and theoretical considerations of a novel class of banana-shaped compounds with liquid crystal properties,” J. Mol. Struct., 543, 89 (2001).
Dingemans, T. J. et al., “Non-linear boomerang-shaped liquid crystals derived from 2,5-bis(p-hydroxyphenyl)-1,3,4-oxadiazole,” Liq. Cryst., 27, 131-136 (2000).
Helfrich, W., “The strength of piezoelectricity in liquid crystals,” Phys. Lett., 35A, 393 (1971).
Derzhanski, A et al., “A molecular-statistical approach to the piezoelectric properties of nematic liquid crystals,” Phys. Lett., 36A, 483 (1971).
Barbero, G. et al., “Evidence for the flexo-electric effect in nematic liquid crystal cell,” Liq. Cryst., 1, 483 (1986).
Valenti, B. et al., “Flexoelectricity in the hybrid aligned nematic cell,” Mol. Cryst. Liq. Cryst., 146, 307 (1987).
Dozov, I. et al., “Flexoelectrically controlled twist of texture in a nematic liquid crystal,” Phys. Lett., (Paris), 43, L-365 (1982).
Kirkman, N. T. et al., “Continuum modelling of hybrid-aligned nematic liquid crystal cells; optical response and flexoelectrcity-induced voltage shift,” Liq. Cryst., 30, 1115 (2003).
Ponti, S. et al., “Flexoelectro-optic effect in hybrid nematic liquid crystal cells,” Liq. Cryst., 26, 1171 (1999).
Takahashi, T. et al., “Novel measurement method for flexoelectric coefficients of liquid crystals,” Jpn. J. Appl. Phys., 37, 1865 (1998).
Beresnev, L. A. et al., “Direct measurement of the flexoelectric polarization of nematic liquid crystals,” JETP Lett., 45, 755 (1987).
Mahesware Murthy, P. R. et al., “Experimental determination of the flexoelectric coefficients of some liquid crystals,” Liq. Cryst., 14, 483 (1993).
Gleeson James T.
Harden, Jr. John Ernest
Jakli Antal I.
Palffy-Muhoray Peter
Sprunt Samuel
Dougherty Thomas
Hahn Loeser & Parks LLP
Kent State University
Oklham, Esq. Scott M.
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