Patents by Inventor Oleg D. Lavrentovich
Oleg D. Lavrentovich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8704977Abstract: The invention provides a liquid crystal cell and method thereof. The cell comprises two opposed substrates and a surfactant-free lyotropic chromonic liquid crystals (LCLC) material disposed therebetween. By using an ammonium compound with LCLC or surface treatment on the substrates, the alignment of the LCLC material can be manipulated as a homeotropic bulk alignment; or a hybrid bulk alignment in which the LCLC alignment is changed from homeotropic bulk alignment in the vicinity of one substrate to planar alignment in the vicinity of another substrate. The cell can be used in biosensing, detection and amplification of ligands, optical devices, and photovoltaics etc.Type: GrantFiled: March 5, 2008Date of Patent: April 22, 2014Assignee: Kent State UniversityInventors: Oleg D. Lavrentovich, Yuriy A. Nastyshyn, Vassili G. Nazarenko, Roman M. Vasyuta, Oleksandr P. Boiko, Ye Yin, Sergij V. Shiyanovskii
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Patent number: 8570460Abstract: A liquid crystalline optical medium includes polymer stabilized liquid crystal material. The polymer stabilized liquid crystal material includes a short pitch cholesteric liquid crystal material stabilized by a polymer material. The effective phase retardation of the polarization independent liquid crystal optical medium can be controlled by external (for example, electric and magnetic) fields.Type: GrantFiled: December 19, 2006Date of Patent: October 29, 2013Assignee: Kent State UniversityInventors: Mingxia Gu, Liubov Kreminska, Andrii Golovin, Oleg D. Lavrentovich
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Patent number: 8294645Abstract: The invention provides a liquid crystal device and method thereof. Subsequent to applying a first electrical voltage on a liquid crystal to induce a reorientation of the liquid crystal, a second electrical voltage with proper polarity is applied on the liquid crystal to assist the relaxation of the reorientation that was induced by the first electrical voltage. The “switch-off” phase of the liquid crystal can therefore be accelerated or temporally shortened, and the device can exhibit better performance such as fast response to on/off signals. The invention can be widely used LCD, LC shutter, LC lens, spatial light modulator, telecommunication device, tunable filter, beam steering device, and electrically driven LC device, among others.Type: GrantFiled: March 12, 2009Date of Patent: October 23, 2012Assignee: Kent State UniversityInventors: Sergij V. Shiyanovskii, Mingxia Gu, Oleg D. Lavrentovich
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Publication number: 20120162548Abstract: A method of electrophoretic movement of particles through a liquid crystal utilizes a direct (DC) or alternating (AC) electric field that is applied along the liquid crystal director (for liquid crystals with a positive dielectric anisotropy) or perpendicular to the director (for liquid crystals with a negative dielectric anisotropy). A perpendicular or tilted orientation of the liquid crystal molecules at the surface of the particle causes distortions, such that the fore-aft (or left-right) symmetry of the particle is broken. The asymmetric orientation of the liquid crystal around the particle allows both charged and neutral particles to be transported, even when the particles themselves are perfectly symmetric (spherical).Type: ApplicationFiled: December 13, 2011Publication date: June 28, 2012Inventors: Oleg D. Lavrentovich, Israel Esteban Lazo-Martinez, Oleg P. Pishnyak
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Publication number: 20110017949Abstract: The present invention comprises a device and method for ordering molecules of lyotropic chromonic liquid crystals to aligned structure of a dried film. An example of an aligned film may be transparent to visible light but not transparent to polarized light in the ultraviolet and/or infrared portions of the electromagnetic spectrum. A shearing device having a shearing tool and a repelling pad may repel the solvent and provide a shear force to shear the LCLC dissolved in the solvent as a film on the surface of a substrate. A method of making an aligned lyotropic chromonic liquid crystal-based film comprises providing a mixture of a lyotropic chromonic liquid crystal material in a solvent for the liquid crystal material, applying the mixture to a substrate, shearing the lyotropic chromonic liquid crystal with a shearing device and removing the solvent to produce an aligned lyotropic chromonic liquid crystal-based film.Type: ApplicationFiled: June 16, 2010Publication date: January 27, 2011Applicant: KENT STATE UNIVERSITYInventors: Andrii B. Golovin, Oleg D. Lavrentovich
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Patent number: 7732219Abstract: A system for the detection of ligands comprising at least one receptor and an amplification mechanism coupled to the receptor wherein an amplified signal is produced as a result of receptor binding a ligand. Examples of suitable amplification mechanisms include antibody-embedded liquid crystalline materials; use of alpha-2-macroglobulin to encage an enzyme, whereby the enzyme is separated from its substrate by an receptor; and a receptor engineered to inhibit the active of site of an enzyme only in the absence of a ligand. Also provided are methods for the automatic detection of ligands.Type: GrantFiled: September 10, 2007Date of Patent: June 8, 2010Assignee: Kent State UniversityInventors: Christopher J. Woolverton, Gary D. Niehaus, Kathleen J. Doane, Oleg D. Lavrentovich, Steven P. Schmidt, Steven A. Signs
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Publication number: 20100044650Abstract: The invention provides a nanoparticle composition, a device including the nanoparticle composition, and a method thereof. The composition comprises nanoparticles such as Gold nanorods (NR) and electrically charged self-assembled molecular aggregates such as disodium chromoglycate (DSCG) in a common solvent such as water. The nanoparticles are assembled as, for example, side-by-side and end-to-end assemblies of nanorods, through a non-covalent interaction such as anisotropic electrostatic interaction with the electrically charged self-assembled molecular aggregates.Type: ApplicationFiled: August 25, 2009Publication date: February 25, 2010Inventors: OLEG D. LAVRENTOVICH, HEUNG-SHIK PARK
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Publication number: 20090231260Abstract: The invention provides a liquid crystal device and method thereof. Subsequent to applying a first electrical voltage on a liquid crystal to induce a reorientation of the liquid crystal, a second electrical voltage with proper polarity is applied on the liquid crystal to assist the relaxation of the reorientation that was induced by the first electrical voltage. The “switch-off” phase of the liquid crystal can therefore be accelerated or temporally shortened, and the device can exhibit better performance such as fast response to on/off signals. The invention can be widely used LCD, LC shutter, LC lens, spatial light modulator, telecommunication device, tunable filter, beam steering device, and electrically driven LC device, among others.Type: ApplicationFiled: March 12, 2009Publication date: September 17, 2009Inventors: Sergij V. Shiyanovskii, Mingxia Gu, Oleg D. Lavrentovich
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Publication number: 20090226639Abstract: The invention provides a liquid crystal cell and method thereof. The cell comprises two opposed substrates and a surfactant-free lyotropic chromonic liquid crystals (LCLC) material disposed therebetween. By using an ammonium compound with LCLC or surface treatment on the substrates, the alignment of the LCLC material can be manipulated as a homeotropic bulk alignment; or a hybrid bulk alignment in which the LCLC alignment is changed from homeotropic bulk alignment in the vicinity of one substrate to planar alignment in the vicinity of another substrate. The cell can be used in biosensing, detection and amplification of ligands, optical devices, and photovoltaics etc.Type: ApplicationFiled: March 5, 2008Publication date: September 10, 2009Inventors: Oleg D. Lavrentovich, Yuriy A. Nastyshyn, Vassili G. Nazarenko, Roman M. Vasyuta, Oleksandr P. Boiko, Ye Yin, Sergij V. Shiyanovskii
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Publication number: 20080138244Abstract: A system for the detection of ligands comprising at least one receptor and an amplification mechanism coupled to the receptor wherein an amplified signal is produced as a result of receptor binding a ligand. Examples of suitable amplification mechanisms include antibody-embedded liquid crystalline materials; use of alpha-2-macroglobulin to encage an enzyme, whereby the enzyme is separated from its substrate by an receptor; and a receptor engineered to inhibit the active of site of an enzyme only in the absence of a ligand. Also provided are methods for the automatic detection of ligands.Type: ApplicationFiled: September 10, 2007Publication date: June 12, 2008Applicant: KENT STATE UNIVERSITYInventors: Christopher J. Woolverton, Gary D. Niehaus, Kathleen J. Doane, Oleg D. Lavrentovich, Steven P. Schmidt, Steven A. Signs
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Patent number: 7372480Abstract: A liquid crystal device comprises a first and second cell wall structure; at least one liquid crystal material disposed within a space between the first and second cell wall structures; and polymer micro-structures, wherein the micro-structures are formed by polymerizing a prepolymer, and wherein said micro-structures have a shape and spatial location determined by said liquid crystal material. Permanent polymer micro-structures are formed from a liquid crystal with a non-uniform spatially modulated director field. The polymer structures have the shape and spatial location dictated by the non-uniform director field of the liquid crystal. The micro-structures are a backbone that restores the liquid crystal director field that existed during the polymerization process even when other factors, such as electric field, temperature, or surface anchoring, do not favor this restoration.Type: GrantFiled: December 7, 2004Date of Patent: May 13, 2008Assignee: Kent State UniversityInventors: Oleg D. Lavrentovich, Dmitry Voloschenko, Sergij Shiyanovskii
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Patent number: 7267957Abstract: A system for the detection of ligands comprising at least one receptor and an amplification mechanism coupled to the receptor wherein an amplified signal is produced as a result of receptor binding a ligand. Examples of suitable amplification mechanisms include antibody-embedded liquid crystalline materials; use of alpha-2-macroglobulin to encage an enzyme, whereby the enzyme is separated from its substrate by an receptor; and a receptor engineered to inhibit the active of site of an enzyme only in the absence of a ligand. Also provided are methods for the automatic detection of ligands.Type: GrantFiled: April 26, 2002Date of Patent: September 11, 2007Assignee: Kent State UniversityInventors: Christopher J Woolverton, Gary D Niehaus, Kathleen J Doane, Oleg D Lavrentovich, Steven P Schmidt, Steven A Signs
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Patent number: 7160736Abstract: Devices and systems for the detection of ligands comprising at least one receptor and an amplification mechanism comprising a liquid crystalline, where an amplified signal is produced as a result of receptor binding to a ligand are provided. Also provided are methods for the automatic detection of ligands.Type: GrantFiled: December 1, 2003Date of Patent: January 9, 2007Assignee: Kent State UniversityInventors: Gary D. Niehaus, Christopher J. Woolverton, Oleg D. Lavrentovich
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Patent number: 6897915Abstract: A liquid crystal device comprises a first and second cell wall structure; at least one liquid crystal material disposed within a space between the first and second cell wall structures; and polymer micro-structures, wherein the micro-structures are formed by polymerizing a prepolymer, and wherein said micro-structures have a shape and spatial location determined by said liquid crystal material. Permanent polymer micro-structures are formed from a liquid crystal with a non-uniform spatially modulated director field. The polymer structures have the shape and spatial location dictated by the non-uniform director field of the liquid crystal. The micro-structures are a backbone that restores the liquid crystal director field that existed during the polymerization process even when other factors, such as electric field, temperature, or surface anchoring, do not favor this restoration.Type: GrantFiled: September 27, 2001Date of Patent: May 24, 2005Assignee: Kent State UniversityInventors: Oleg D. Lavrentovich, Dmitry Voloschenko, Sergij Shiyanovskii
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Publication number: 20040175841Abstract: Devices and systems for the detection of ligands comprising at least one receptor and an amplification mechanism comprising a liquid crystalline, where an amplified signal is produced as a result of receptor binding to a ligand are provided. Also provided are methods for the automatic detection of ligands.Type: ApplicationFiled: December 1, 2003Publication date: September 9, 2004Applicant: Kent State UniversityInventors: Gary D. Niehaus, Christopher J. Woolverton, Oleg D. Lavrentovich
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Patent number: 6673398Abstract: A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable with the techniques, in particular, LCLCs can be aligned at a surface as one monomolecular layer as a stack of monomolecular layers. The method for monolayer alignment is based on alternate layer-by-layer adsorption of polyions and dyes from aqueous solutions that have liquid crystalline structure. Using this method, one is able to stack alternate monolayers of dye and polyion while controlling the long-range in-plane orientation of the dye molecules within the plane of each layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, alignment of multilayered stacks allows one to use the resulting dried LCLC films in optical devices, for example, as internal polarizers, color filters, optical compensators, band-gap filters, and the like.Type: GrantFiled: May 14, 2001Date of Patent: January 6, 2004Assignee: Kent State UniversityInventors: Tod Schneider, Oleg D. Lavrentovich
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Patent number: 6570632Abstract: A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable in bulk. LCLCs can be aligned in bulk as a uniform liquid crystalline monodomain within a closed cell. The method for bulk alignment of LCLCs is based on a unidirectional treatment of the aligning substrate such as a polymer layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, bulk alignment of LCLCs allows one to use them in detection and amplification of ligands.Type: GrantFiled: June 7, 2002Date of Patent: May 27, 2003Assignee: Kent State UniversityInventors: Oleg D. Lavrentovich, Tomohiro Ishikawa
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Publication number: 20020168511Abstract: A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable with the techniques, in particular, LCLCs can be aligned at a surface as one monomolecular layer as a stack of monomolecular layers. The method for monolayer alignment is based on alternate layer-by-layer adsorption of polyions and dyes from aqueous solutions that have liquid crystalline structure. Using this method, one is able to stack alternate monolayers of dye and polyion while controlling the long-range in-plane orientation of the dye molecules within the plane of each layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, alignment of multilayered stacks allows one to use the resulting dried LCLC films in optical devices, for example, as internal polarizers, color filters, optical compensators, band-gap filters, and the like.Type: ApplicationFiled: May 14, 2001Publication date: November 14, 2002Applicant: Kent State UniversityInventors: Tod Schneider, Oleg D. Lavrentovich
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Publication number: 20020167632Abstract: A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable in bulk. LCLCs can be aligned in bulk as a uniform liquid crystalline monodomain within a closed cell. The method for bulk alignment of LCLCs is based on a unidirectional treatment of the aligning substrate such as a polymer layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, bulk alignment of LCLCs allows one to use them in detection and amplification of ligands.Type: ApplicationFiled: June 7, 2002Publication date: November 14, 2002Applicant: Kent State UniversityInventors: Oleg D. Lavrentovich, Tomohiro Ishikawa
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Patent number: 6411354Abstract: A broad class of lyotropic liquid crystals of a non-surfactant nature, the so-called lyotropic chromonic liquid crystals (LCLCs), are alignable in bulk. LCLCs can be aligned in bulk as a uniform liquid crystalline monodomain within a closed cell. The method for bulk alignment of LCLCs is based on a unidirectional treatment of the aligning substrate such as a polymer layer. The feature of controlling the alignment of LCLCs enables one to create practical devices from them. For example, bulk alignment of LCLCs allows one to use them in detection and amplification of ligands.Type: GrantFiled: May 11, 2001Date of Patent: June 25, 2002Assignee: Kent State UniversityInventors: Oleg D. Lavrentovich, Tomohiro Ishikawa