Maeda, M., Kumar, R.S., Blumstein, A., Tripathy, S.K., Sixou, P.
In an attempt to synthesize side chain liquid crystalline polymers containing NLO active moieties, a number of p-substituted aromatic azomethine phenols with donor-acceptor substituents such as N=C...
Chittibabu, K. G., Li, L., Kamath, M., Kumar, J., Tripathy, S. K.
A new, solution processable, thiophene copolymer with a side chain nonlinear optical (NLO) chromophore namely Poly(3-octylthiophene-co-N-(3-thenyl) -4-amino-2-nitro phenol) (POMDT) has been...
Kim, W. H., Bihari, B., Moody, R., Kodali, N. B., Kumar, J., Tripathy, S. K.
The polymer chains of a novel asymmetric polydiacetylene, namely poly((8-butoxy carbonyl) methyl urethanyl) 1-(5-pyrimidyl)-octa-1,3-diyneD), in the absence of nonlinear optically active chromophores...
Nonlinear Optical Polymers Derived from Organic/Inorganic Composites (2006)
Tripathy, S. K., Kumar, J., Chen, J. I., Marturunkakul, S., Jeng, R. J., Li, L., ...
A general approach to the development of multicomponent multifunctional stable NLO materials based on sol-gel reactions has been discussed. We have shown that these second order NLO organic/inorganic...
Low Loss Second-Order Nonlinear Optical Polymers Based on All Organic Sol-Gel Materials (2006)
Jeng, R. J ., Hsiue, G. H., Chen, J. I., Marturunkakul, S., Li, L., Jiang, X. L., ...
A new class of all organic sol-gel second-order nonlinear optical (NLO) materials based on hexa(methoxymethyl)melamine (HMM) has been developed. Two NLO active chromophores,...
New Developments in Second-Order Nonlinear Optical Polymeric Materials (2006)
Tripathy, S. K., Kim, W. K., Bihari, B., Cheong, D. W., Kumar, J.
Second harmonic generation from the spin coated films of an asymmetrically substituted polydiacethlene, namely poly((8-butoxy cardonylmethyl urethanyl) 1-(5-pyrimidyl)-octa-1,3- diyne(BPOD) is...
Comparison of Single and Double Stranded DNA Binding to Polypyrrole (2006)
Pande, R., Lim, J. O., Marx, K. A., Tripathy, S. K., Kaplan, D. L.
The polycation conducting polymer, oxidized polypyrrole, possesses the ability to form complexes with DNA. Our previously proposed diffusion limited binding model for double helical DNA was also...
Lim, J. O., Kamath, M., Marx, K. A., Tripathy, S. K., Kaplan, D. L.
A novel hierarchical biomaterial capable of incorporating any biotinylated biomolecule has been created. Our strategy is to biotinylate one- dimensional electroactive polymers and use a bridging...
Magnetocaloric effect in the intermetallic compound DyNi (2005)
Tripathy, S. K., Suresh, K. G., Nirmala, R., Nigam, A. K., Malik, S. K.
Magnetic and heat capacity measurements have been carried out on the polycrystalline sample of DyNi which crystallizes in the orthorhombic FeB structure (space group Pnma). This compound is...
Samuelson, L., Rahman, A. K., Puglia, G. P., Clough, S., Tripathy, S. K.
Novel, self-assembled materials have been designed and produced from first principle to possess unique structural hierarchy and electronic and optical properties. The Langmuir-Blodgett technique was...
Optimized Processing Condition for a Photocrosslinkable Stable Nonlinear Optical Polymer. (1998)
Lee, J. Y., Kim, W. H., Mandal, B. K., Kumar, J., Tripathy, S. K.
The optimum processing condition for a photocrosslinking nonlinear optical (NLO) polymeric system was established. Parameters such as change in heat capacity at glass transition temperature, rate of...
Design and Synthesis of a New Class of Photocrosslinkable Nonlinear Optical Polymers. (1998)
Tripathy, S. K., Mandal, B. K., Jeng, R. J., Lee, J. Y., Kumar, J.
We have developed a new class of photocrosslinkable polymers with stable second and third order nonlinear optical (NLO) properties. The polymers have significant processing advantages over their...
Molecular Dynamics Simulation of Substituted Polyacetylenes. (1998)
Sun, X. F., Clough, S. B., Tripathy, S. K., Baker, G. L.
Molecular mechanics and molecular dynamics calculations have been applied to several substituted polyacetylenes. Results for the barrier height for single bond rotation for polyacetylene were...
Optical and Electro-Optical Properties of a Photocross-Linkable Polymer. (1998)
Rahman, A. K., Mandal, B. K., Zhu, X. F., Kumar, J., Tripathy, S. K.
Planar waveguides from a photocross-linkable polymer have been fabricated on glass and SiO2 on silicon using the spin coating process. The polymer has been cross-linked by exposure to UV radiation...
Jeng, R. J., Chen, Y. M., Mandal, B. K., Kumar, J., Tripathy, S. K.
Epoxy based material incorporating 4-(4'-nitrophenylazo) phenylamine has been synthesized and subsequently functionalized with cinnamoyl groups. These materials can be easily solution-processed into...
A New Guest-Host System: Towards Stable Second-Order Optical Nonlinearity. (1998)
Jeng, R. J., Chen, Y. M., Jain, A. K., Tripathy, S. K., Kumar, J.
A new guest-host system based on the azo dye disperse red 1 and phenyl siloxane polymer has been investigated. The second order susceptibility of the polymer cured at 220 deg C was found to be stable...
Third-Order Optical Nonlinearities in a Photocrosslinkable Polymer. (1998)
Li, L., Lee, J. Y., Zhu, X. F., Kumar, J., Tripathy, S. K.
Quadratic electro-optic coefficient measurements on a dye doped photocrosslinkable nonlinear optical (NLO) polymer-PVCN (polyvinylcinnamate)/CNNB-R...
Photoconductivity in a Photocrosslinkable Second Order Nonlinear Optical Polymer. (1998)
Li, L., Lee, J. Y., Yang, Y., Kumar, J., Tripathy, S. K.
Photoconductivity measurements on stable photocrosslinkable nonlinear optical polymer - PVCN (polyvinylcinnamate)/CNNB-R (3-cinnamoyloxy-4-4-(N,N-diethylamino)-2-cinnamoyloxy phenvlazo nitrobenzene)...
Photoprocessable Second Order Nonlinear Optical Polymers. (1998)
Kumar, J., Tripathy, S. K., Mandal, B. K., Chen, Y. M., Jeng, R. J.
Dye-doped polymers and polymers with covalently attached nonlinear-optical (NLO) moieties have demonstrated that large second-order susceptibilities in polymers are achievable. For practical...
Dynamic Mechanical Behavior of Photocrosslinkable Nonlinear Optical Polymers. (1998)
Marturunkakul, S., Lee, J. Y., Sengupta, S. K., Kumar, J., Tripathy, S. K.
An easily processable photocrosslinking guest-host system with stable second o properties using polyvinylcinnamate as a host polymer has been developed. Samples were made as free standing films from...
Li, L., Jeng, R. J., Kamath, M., Kumar, J., Tripathy, S. K.
Photoconductivity in photocrosslinkable second order nonlinear optical (NLO) polymeric materials and photovoltage generation in a poled guest-host polymer are reported. These NLO polymers have been...
Chen, J. I., Marturunkakul, S., Chen, Y. M., Kumar, J., Tripathy, S. K.
The relaxation of poled nonlinear optical (NLO) chromophores in polymer films was characterized by infrared reflection-absorption spectroscopy. Both a guest-host system and a photocrosslinkable...
Marturunkakul, S., Kumar, J., Tripathy, S. K.
Polymeric materials with second order nonlinear optical (NLO) properties are of much interest for applications such as waveguide electrooptic modulation and frequency doubling devices. These NLO...
Laser-Induced Holographic Surface Relief Gratings on Nonlinear Optical Polymer Films. (1998)
Kim, D. Y., Li, L., Kumar, J., Tripathy, S. K.
We report observation of holographic surface relief gratings with relatively large amplitude on a second order nonlinear optical polymeric material. Surface relief gratings on these polymer films...
An Interpenetrating Polymer Network for Second-Order Nonlinear Optics. (1998)
Li, L., Chen, J. I., Marturunkakul, S., Kumar, J., Tripathy, S. K.
The linear optical and second order nonlinear optical (NLO) properties of an interpenetrating polymer network (IPN) have been investigated. For the poled and cured IPN samples, large second order NLO...
Laser-Induced Holographic Surface Relief Gratings on Nonlinear Optical Polymer Films. (1998)
Kim, D. Y., Li, L., Kumar, J., Tripathy, S. K.
We report observation of holographic surface relief gratings with relatively large amplitude on a second order nonlinear optical polymeric material. Surface relief gratings on these polymer films...
Polarized Laser Induced Holographic Surface Relief Gratings on Polymer Films. (1998)
Kim, D. Y., Li, Lian, Shivshankar, V., Kumar, J., Tripathy, S. K.
Large amplitude holographic surface relief gratings on azobenzene containing polymer films were optically induced without any subsequent processing steps. The surface relief structures were observed...
Cheong, D. W., Kim, W. H., Samuelson, L. A., Kumar, J., Tripathy, S. K.
A soluble, asymmetric polydiacetylene has been shown to form stable monolayers at the air-water interface of a Langmuir trough. The monolayers of this unconventional amphiphilic polymer could be...
Enzymatic Polymerization of Phenolic Biomonomers Derived from Cashew Nut Shell Liquid (CNSL). (1998)
Alva, K. S., Nayak, P. L., Kumar, J., Tripathy, S. K.
Enzymatic polymerization of alkyl phenols derived from a renewable resource, viz. cashew nut shell, has been carried out in dioxane-water mixture. The reaction and reaction products have been...
Photofabrication of Surface Relief Gratings Using Post Functionalized Azo Polymers (1998)
Tripathy, S. K., Kumar, J., Kim, D. Y., Jiang, X., Wang, X.
A series of azobenzene functionalized polymers has been synthesized by post polymerization azo coupling reaction. Photo-fabrication of surface relief gratings were studied on the polymer films. Epoxy...
Jiang, X. L., Li, L., Kumar, J., Kim, D. Y., Tripathy, S. K.
Direct formation of surface relief gratings at modest intensities on azobenzene polymers has recently been accomplished. Unusual optical erasure of these surface relief gratings was observed. It is...
Photofabrication of Surface Relief Gratings Using Photodynamic Polymers (1997)
Tripathy, S. K., Kim, D. Y., Jiang, X. L., Li, L., Lee, T. S.
We present novel observation and detailed investigation of a photodynamic polymer transport process. Surface gratings were photofabricated on various polymer films containing azo groups in the side...
Epoxy Based Nonlinear Optical Polymers from Post Azo-Coupling Reaction. (1997)
Wang, X., Kumar, J., Tripathy, S. K., Li, L., Chen, J. -I.
A series of novel second order nonlinear optical (NLO) polymers have been developed based on a precursor polymer prepared from the diglycikyl ether of Bisphenol A and aniline. The precursor polymer...
Jiang, X. L., Kumar, J., Kim, D. Y., Li, L., Tripathy, S. K.
We report our investigations of polarization dependent recording of surface relief gratings on azobenzene containing polymer films. The experimental results indicate that the localized variations of...
Jiang, X. L., Li, L., Kumar, J., Tripathy, S. K.
Photoassisted poling of azobenzene containing polymer films at room temperature using polarized Ar(+) laser beam as pump light was studied. Irradiating the films with p-polarized pump light at an...
Poled Ordered Phenoxy-Silicon Polymer as Second Order Nonlinear Optical Materials. (1996)
Jeng, R. J., Chen, Y. M., Chen, J. I., Kumar, J., Tripathy, S. K.
Copyright: American Copyright: American
Tripathy, S K, Svensson, E C, Black, H B, Goldwasser, E, Margalith, M, Hobart, P M, ...
Erythropoietin (Epo)-responsive anemia is a common and debilitating complication of chronic renal failure and human immunodeficiency virus infection. Current therapy for this condition involves...
Tripathy, S K, Goldwasser, E, Lu, M M, Barr, E, Leiden, J M
A number of inherited and acquired serum protein deficiencies including hemophilias A and B, diabetes mellitus, and the erythropoietin-responsive anemias are currently treated with repeated...
Gomez, R, Goodman, L E, Tripathy, S K, O'Rourke, E, Manne, V, Tamanoi, F
Protein farnesyltransferase (FTase) catalyses the addition of a farnesyl group to a cysteine within the so-called 'CAAX box' at the C-terminus of various proteins. In the present paper we report...
Tripathy, S K, Svensson, E C, Black, H B, Goldwasser, E, Margalith, M, Hobart, P M, ...
Erythropoietin (Epo)-responsive anemia is a common and debilitating complication of chronic renal failure and human immunodeficiency virus infection. Current therapy for this condition involves...
Tripathy, S K, Goldwasser, E, Lu, M M, Barr, E, Leiden, J M
A number of inherited and acquired serum protein deficiencies including hemophilias A and B, diabetes mellitus, and the erythropoietin-responsive anemias are currently treated with repeated...
Gomez, R, Goodman, L E, Tripathy, S K, O'Rourke, E, Manne, V, Tamanoi, F
Protein farnesyltransferase (FTase) catalyses the addition of a farnesyl group to a cysteine within the so-called 'CAAX box' at the C-terminus of various proteins. In the present paper we report...