Thematische Bibliographien / Mesogenic materials

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Buchteile
  4. Konferenzberichte

Auswahl der wissenschaftlichen Literatur zum Thema „Mesogenic materials“

Autor: Grafiati
Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Mesogenic materials"

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Paul, Saurav, Bimal Bhushan Chakraborty, Kuheli Deb, and Sudip Choudhury. "Synthesis of mesogen-nanoparticle composites by doping 4-decyloxybenzoic acid with substrate-functionalized ZnO nanoparticle." Communications in Science and Technology 8, no. 1 (2023): 38–42. http://dx.doi.org/10.21924/cst.8.1.2023.1125.

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Nanomaterials and Mesogenic materials are two important pillars of today’s science and technology, in the fields of both material and biological applications. Mesogens or liquid crystals (LC) are self-aggregated anisotropic fluids with long range order, and the nature of self-aggregation largely controls their physical and material properties. Doping of nanomaterials over liquid crystalline matrix can provide valuable tools for development of materials with new or improved properties. In the present work 4-decyloxybenzoic acid is taken as the mesogenic matrix. It is observed that, composite pr
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Gorbachev, Stanislav A., and yacheslav V. Zuev. "Synthesis and Mesomorphic Properties of Biphenyl Derivatives with Central Unit Based on 1,6-Hexamethylene Diisocyanate Oligomers." Liquid Crystals and their Application 22, no. 4 (2022): 27–36. http://dx.doi.org/10.18083/lcappl.2022.4.27.

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A number of compounds with biphenyl as a mesogenic fragment and a structure simulating LC dimers, polymers with mesogenic side chain groups and a star-shaped structure have been synthesized. An approach for the synthesis of such compounds under mild conditions and without a complex purification procedure with a quantitative yield, has been developed. The approach is the implementation of “click chemistry” methods for the synthesis of LC compounds. It has been shown that the LC state is observed only if there are three biphenyls in one molecule, i.e., the compounds appear to be similar to polye
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Goodby, J. W. "Mesogenic molecular crystalline materials." Current Opinion in Solid State and Materials Science 4, no. 4 (1999): 361–68. http://dx.doi.org/10.1016/s1359-0286(99)00035-2.

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Dolden, J. G., and P. T. Alder. "The Mesogenic Index: An Empirical Method for Predicting Polymeric Liquid Crystallinity." High Performance Polymers 10, no. 3 (1998): 249–72. http://dx.doi.org/10.1088/0954-0083/10/3/004.

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An empirical method for predicting the chemical compositions of random or partially ordered copolymers that exhibit mesophases was devised by the authors in 1989, while working on liquid crystal copolymer synthesis for BP Chemicals. A brief description of the method and its application to the chemical synthesis of amorphous thermotropic polyamides was given by the authors in a previous paper. Thermotropic polyimides were also synthesized by the authors as a result of the use of the predictive method. Subsequently, the method has been updated and applied to polycarbonates and polyimides. The ne
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Malthête, Jacques. "Mesogenic calixarenes." Advanced Materials 6, no. 4 (1994): 315. http://dx.doi.org/10.1002/adma.19940060414.

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Guo, Fei, and Robert Hurt. "Supramolecular Synthesis of Graphenic Mesogenic Materials." Macromolecular Chemistry and Physics 213, no. 10-11 (2012): 1164–74. http://dx.doi.org/10.1002/macp.201100600.

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Hakemi, H. "The effect of a compatible liquid crystal polymer on homogeneous reinforcement of mesogenic and nonmesogenic rigid-rod monomers." Material Science & Engineering International Journal 6, no. 1 (2022): 1–4. http://dx.doi.org/10.15406/mseij.2022.06.00172.

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Discrete amount of main-chain Liquid Crystal Polymers (LCP) could mechanically reinforce the mesophase of rigid-rod monomers to form a supramolecular homogeneous composite for Liquid Crystal Display (LCD) materials. Moreover, a homogeneously dispersed LCP may induce an enantiotropic transition in monotropic or non-mesogenic rigid-rod compounds. In this work, we studied the blends of a flexible main-chain nematic LCP with an enantiotropic nematic, a monotropic nematic, and two non-mesogenic rigid-rod compounds as model systems. The results indicate that homogenous reinforcement of thermotropic
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Rabie, Feras, Lenka Poláková, Sebastian Fallas, Zdenka Sedlakova, Eva Marand, and Stephen M. Martin. "Temperature-Dependent Gas Transport Behavior in Cross-Linked Liquid Crystalline Polyacrylate Membranes." Membranes 9, no. 8 (2019): 104. http://dx.doi.org/10.3390/membranes9080104.

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Stable, cross-linked, liquid crystalline polymer (LCP) films for membrane separation applications have been fabricated from the mesogenic monomer 11-(4-cyanobiphenyl-4′-yloxy) undecyl methacrylate (CNBPh), non-mesogenic monomer 2-ethylhexyl acrylate (2-EHA), and cross-linker ethylene glycol dimethacrylate (EGDMA) using an in-situ free radical polymerization technique with UV initiation. The phase behavior of the LCP membranes was characterized using differential scanning calorimetry (DSC) and X-ray scattering, and indicated the formation of a nematic liquid crystalline (LC) phase above the gla
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Lu, Yao-Chih, Yu-Tsz Hsu, Tsung-Yen Yang, et al. "Converting non-Mesogenic to Mesogenic Stacking of Amino-s-Triazine-Based Dendrons with p-CN Phenyl Unit by Eliminating Peripheral Dipole." Nanomaterials 12, no. 2 (2022): 185. http://dx.doi.org/10.3390/nano12020185.

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Three new amino-s-triazine-based dendrons, 1a, 1b, and 1c, containing an aryl-CN moiety in the dendritic skeleton were prepared in 72–81% yields (1a: R1 = − N(n-C8H17)2, R2 = n-OC8H17, 1b: R1 = R2 = − N(n-C8H17)2, 1c: R1 = − N(n-C8H17)2, R2 = − N(n-C4H9)2). Dendrons 1a with N(n-C8H17)2 and n-OC8H17 peripheral substituents, surprisingly, did not show any mesogenic phase during the thermal process. However, non-mesogenic 1a can be converted to mesogenic 1b or 1c by eliminating the peripheral dipole arising from the alkoxy substituent; dendron 1b only comprising the same N(n-C8H17)2 peripheral gr
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Ono, H., T. Kawamura, N. M. Frias, K. Kitamura, N. Kawatsuki, and H. Norisada. "Photorefractive Mesogenic Composites." Advanced Materials 12, no. 2 (2000): 143–46. http://dx.doi.org/10.1002/(sici)1521-4095(200001)12:2<143::aid-adma143>3.0.co;2-9.

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Dissertationen zum Thema "Mesogenic materials"

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Nicholas, B. M. "The synthesis and properties of some new mesogenic materials." Thesis, University of Hull, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376375.

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Perkins, Steven Patrick. "The effect of molecular structure on the mesogenic properties of liquid crystalline materials." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302348.

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Davis, David Richard. "Synthesis and Mesogenic Properties of Liquid Crystals with Bent Core-Tail Substitution Geometry." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1374770168.

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Cheng, Yao-Yi. "Crystallization studies of liquid crystalline polycarbonates based on substituted stilbene mesogen." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38090.

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Kim, Namil. "Photoisomerization - And Photopolymerization-Induced Phase Transitions in Mixtures of Photoresponsive Chromophores and Reactive Mesogens." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280254227.

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Biswas, Soma. "EFFECT OF LINKER CHEMISTRY AND TERMINAL SUBSTITUENTS ON THE LIQUID CRYSTALLINE PROPERTIES OF BIS(AZOBENZENE) MESOGENS." Thesis, The University of Arizona, 2008. http://hdl.handle.net/10150/193436.

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Azobenzene upon photochemical E/Z isomerization changes both its shape and size. The E-azobenzene moiety falls in the class of calamitic liquid crystalline mesogens, producing a wide variety of mesophases. Two series of linear bis(azobenzene) compounds, one with phenyl benzoate linkage and the other with benzyl benzoate linkage were synthesized. The termini of these molecules ranged from a dodecyloxy chain to hydrophobic amphiphilic dendrons up to first generation. We determined the effects of both the linkages and generation number on the mesogenic properties of these compounds. Our results s
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Sharpnack, Lewis Lee. "Mesomorphism of Newly Synthesized Mesogens and Surface Morphology of Chalcogenide Glass Thin Films." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1499949477885501.

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Castiglione, Andrea. "Liquid crystalline macromolecular architectures based on regioregular poly(3-alkylthiophene) as backbone and calamitic mesogens as side-groups : towards ambipolar materials." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066693.

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Très récemment, le potentiel des semi-conducteur organiques (OSC) ambipolaires à attiré l'attention par de nombreuses applications technologiques. Dans le domaine de la microélectronique organique, l'un des obstacles majeurs pour le développent des OSC est le design de systèmes capables de transporter à la fois les électrons et les trous. Les matériaux semi-conducteurs ambipolaires ordonnés, peuvent répondre à cette problématique. Dans ce contexte nous avons développé la synthèse et la caractérisation d'une architecture macromoléculaire originale, fondée sur l'association d'un polymère semi-co
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Hicks, Sarah Elizabeth. "Polymer-Dispersed and Polymer-Stabilized Liquid Crystals." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1333417859.

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Buchteile zum Thema "Mesogenic materials"

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Guo, Fei, and Robert Hurt. "Supramolecular Synthesis of Graphenic Mesogenic Materials." In Chemical Synthesis and Applications of Graphene and Carbon Materials. Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527648160.ch5.

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Kumari, Sanyucta. "Synthesis, Structural Studies of Some Lanthanide Complexes of the Mesogenic Schiff-Base,N,N′-di-(4′-Octadecyloxybenzoate)Salicylidene-I″, 3″-Diamino-2″-Propanol." In Nanostructured Materials and Nanotechnology VII. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118807828.ch13.

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Kurihara, Seiji, Hiroki Ohta, and Takamasa Nonaka. "PHOTOREACTION OF LIQUID CRYSTALS: FIXATION OF ORDERING OF MESOGENIC MOLECULES." In Advanced Materials '93. Elsevier, 1994. http://dx.doi.org/10.1016/b978-1-4832-8380-7.50088-2.

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YAMASHITA, S., M. INAKI, Y. IKEDA, and S. KOHJIYA. "SYNTHESIS, STRUCTURE AND PROPERTIES OF ABA-TYPE TRIBLOCK COPOLYMERS HAVING MESOGENIC GROUPS." In Mechanical Behaviour of Materials VI. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-08-037890-9.50296-9.

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Han, Chang Dae. "Rheology of Liquid-Crystalline Polymers." In Rheology and Processing of Polymeric Materials: Volume 1: Polymer Rheology. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195187823.003.0015.

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Liquid crystals (LCs) may be divided into two subgroups: (1) lyotropic LCs, formed by mixing rigid rodlike molecules with a solvent, and (2) thermotropic LCs, formed by heating. One finds in the literature such terms as mesomorphs, mesoforms, mesomorphic states, and anisotropic liquids. The molecules in LCs have an orderly arrangement, and different orders of structures (nematic, smectic, or cholesteric structure) have been observed, as schematically shown in Figure 9.1. The kinds of molecules that form LCs generally possess certain common molecular features. The structural characteristics that determine the type of mesomorphism exhibited by various molecules have been reviewed. At present, our understanding of polymeric liquid crystals, often referred to as liquid-crystalline polymers (LCPs), is largely derived from studies of monomeric liquid crystals. However, LCPs may exhibit intrinsic differences from their monomeric counterparts because of the concatenation of monomers to form the chainlike macromolecules. The linkage of monomers inevitably means a loss of their translational and orientational independence, which in turn profoundly affects the dynamics of polymers in the liquid state. These intramolecular structural constraints are expressed in the flexibility of the polymer chain. Generally speaking, the chemical constitution of the monomer determines the flexibility and equilibrium dimensions of the polymer chain (Gray 1962). Figure 9.2 illustrates the variability of chain conformation (flexible chain, semiflexible chain, and rigid rodlike chain) forming macromolecules. Across this spectrum of chain flexibility, the persistence in the orientation of successive monomer units varies from the extreme of random orientation (flexible chains) to perfect order (the rigid rod). Hence, efforts have been made to synthesize LCPs that consist of rigid segments contributing to the formation of a mesophase and flexible segments contributing to the mobility of the entire macromolecule in the liquid state (Ober et al. 1984). From the point of view of molecular architecture, as schematically shown in Figure 9.3, two types of LCP have been developed: (1) main-chain LCPs (MCLCPs), having the monomeric liquid crystals (i.e., mesogenic group) in the main chain of flexible links, and (2) side-chain LCPs (SCLCPs), having the monomeric liquid crystals attached, as a pendent side chain, to the main chain.
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"Self-Assembly and Biomimetics." In Nanoscopic Materials: Size-Dependent Phenomena and Growth Principles, 2nd ed. The Royal Society of Chemistry, 2014. http://dx.doi.org/10.1039/bk9781849739078-00296.

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Self-assembly is a process in which structural motives provide specific interaction for directed aggregation of the modular building blocks under equilibrium conditions. Interactions among the building blocks but also between building blocks and solvent play a role. This allows the formation of oriented unimolecular layers and bilayers, such as soap films or biological cell membranes. Depending on the shape of the units, oriented packing may lead to curvature. The interface of the layer to the solvent is associated with a small interfacial energy, and curved surfaces separate regimes of different pressure. In isotropic systems this leads to structures of constant curvature. Nature makes extensive use of these construction principles, and chemists can take advantage of them in biomimetic synthesis in the laboratory. The building motives are often elongated or polar organic molecules such as surfactants, but in liquid crystals the mesogenes can also be disc-shaped. The resulting soft matter structures can be used as moulds for the synthesis of quite artistic architectures from hard ceramics at or near room temperature via the sol–gel process. Alternatively, three-dimensional structures can be designed and synthesised from modules with specific coupling elements. Metal–organic frameworks are examples of such structures which after removal of the solvent are porous and may be stable, suitable for gas adsorption or separation, or catalysis.
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Konferenzberichte zum Thema "Mesogenic materials"

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Furman, Jolanta, and Leszek Makaruk. "New linear liquid crystal polyesters containing bulky steric aliphatic substituents in mesogenic units." In Liquid Crystals: Materials Science and Applications, edited by Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.215552.

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Fujii, A., T. Kitagawa, M. Fujisaki, S. Nagano, N. Tohnai, and M. Ozaki. "Epitaxial growth of mesogenic tetrabenzotriazaporphyrin in freezing process from supercooled liquid crystal state." In 2019 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2019. http://dx.doi.org/10.7567/ssdm.2019.a-2-06.

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Mihara, Takashi, Hiroyuki Kohno, and Naoyuki Koide. "Physical properties of regioregular polythiophene derivatives containing mesogenic or ionic group in the side chain." In Smart Materials, Nano-, and Micro-Smart Systems, edited by Alan R. Wilson. SPIE, 2004. http://dx.doi.org/10.1117/12.585047.

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Torres, Yanira, Timothy White, Amber McClung, and William Oates. "Photoresponsive Azobenzene Liquid Crystal Polymer Networks: In Situ Photogenerated Stress Measurement." In ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3656.

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Azobenzene liquid crystal polymers and polymer networks are adaptive materials capable of converting light into mechanical work. Often, the photomechanical output of the azobenzene liquid crystal network (azo-LCN) is observed as a bending cantilever. The response of these materials can be either static (e.g. a simple bending cantilever) or dynamic (e.g. oscillating cantilever of 20–270 Hz). The resulting photomechanical output is dependent upon the domain orientation of the polymer network and the wavelength and polarization of the actinic light. Polydomain azobenzene liquid crystal polymer ne
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Tam-Chang, Suk-Wah, Liming Huang, Aryal Gyan, Wonewoo Seo, Delfin Mahinay, and Isaac K. Iverson. "Designing chromonic mesogens for the fabrication of anisotropic optical materials." In Integrated Optoelectronic Devices 2008, edited by Liang-Chy Chien. SPIE, 2008. http://dx.doi.org/10.1117/12.761012.

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Dabrowski, Roman S., Jerzy Dziaduszek, and Krzysztof L. Czuprynski. "Synthesis and mesomorphic properties of mesogens containing two ethane or carbonyloxy bridge groups." In Liquid Crystals: Materials Science and Applications, edited by Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.215546.

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Natansohn, A., P. Rochon, J. Mao, and S. Xie. "Optical Storage in Polymers Containing Azo Groups without Electron-Donor - Electron Acceptor Substituents: Poly[4-(2-methacryloyloxy)ethyl-azobenzene]." In Organic Thin Films for Photonic Applications. Optica Publishing Group, 1993. http://dx.doi.org/10.1364/otfa.1993.wd.25.

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Some degree of supramolecular organization can be induced in amorphous polymers containing azobenzene groups by means of polarized light. This phenomenon has been known for about a decade and the relevant literature has been reviewed in one of our recent publications1. This induced preferred orientation of the azobenzene groups can be monitored by a significant change in the refractive index of the polymer film and can thus be usea as an information storage mechanism. Circularly polarized light restores the natural disorder of the azobenzene orientations, enabling erasure of the stored informa
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