Thematische Bibliographien / Nematic phases

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  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
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Auswahl der wissenschaftlichen Literatur zum Thema „Nematic phases“

Autor: Grafiati
Veröffentlicht am 18. Mai 2024

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Zeitschriftenartikel zum Thema "Nematic phases"

1

Samulski, Edward T., Denisse Reyes-Arango, Alexandros G. Vanakaras und Demetri J. Photinos. „All Structures Great and Small: Nanoscale Modulations in Nematic Liquid Crystals“. Nanomaterials 12, Nr. 1 (29.12.2021): 93. http://dx.doi.org/10.3390/nano12010093.

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The nature of the nanoscale structural organization in modulated nematic phases formed by molecules having a nonlinear molecular architecture is a central issue in contemporary liquid crystal research. Nevertheless, the elucidation of the molecular organization is incomplete and poorly understood. One attempt to explain nanoscale phenomena merely “shrinks down” established macroscopic continuum elasticity modeling. That explanation initially (and mistakenly) identified the low temperature nematic phase (NX), first observed in symmetric mesogenic dimers of the CB-n-CB series with an odd number of methylene spacers (n), as a twist–bend nematic (NTB). We show that the NX is unrelated to any of the elastic deformations (bend, splay, twist) stipulated by the continuum elasticity theory of nematics. Results from molecular theory and computer simulations are used to illuminate the local symmetry and physical origins of the nanoscale modulations in the NX phase, a spontaneously chiral and locally polar nematic. We emphasize and contrast the differences between the NX and theoretically conceivable nematics exhibiting spontaneous modulations of the elastic modes by presenting a coherent formulation of one-dimensionally modulated nematics based on the Frank–Oseen elasticity theory. The conditions for the appearance of nematic phases presenting true elastic modulations of the twist–bend, splay–bend, etc., combinations are discussed and shown to clearly exclude identifications with the nanoscale-modulated nematics observed experimentally, e.g., the NX phase. The latter modulation derives from packing constraints associated with nonlinear molecules—a chiral, locally-polar structural organization indicative of a new type of nematic phase.
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2

Dingemans, T. J., L. A. Madsen, N. A. Zafiropoulos, Wenbin Lin und E. T. Samulski. „Uniaxial and biaxial nematic liquid crystals“. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364, Nr. 1847 (21.08.2006): 2681–96. http://dx.doi.org/10.1098/rsta.2006.1846.

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The unusual exhibition of a biaxial nematic phase in nonlinear thermotropic mesogens derived from the 2,5-oxadiazole biphenol (ODBP) core is placed in a general context; the uniaxial nematic phase of the prototypical rod-like mesogen para -quinquephenyl does not follow the classical mean-field behaviour of nematics, thus questioning the utility of such theories for quantitative predictions about biaxial nematics. The nuclear magnetic resonance spectra of labelled probe molecules dissolved in ODBP biaxial nematic phases suggest that a second critical rotation frequency, related to the differences in the transverse diamagnetic susceptibilities of the biaxial nematic, must be exceeded in order to create an aligned two-dimensional powder sample. Efforts to find higher viscosity and lower temperature biaxial nematics (with lower critical rotation rates) to confirm the above conjecture are described. Several chemical modifications of the ODBP mesogenic core are presented.
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Tschierske, Carsten, und Demetri J. Photinos. „Biaxial nematic phases“. Journal of Materials Chemistry 20, Nr. 21 (2010): 4263. http://dx.doi.org/10.1039/b924810b.

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4

Akpinar, Erol, und Antônio Figueiredo Neto. „Experimental Conditions for the Stabilization of the Lyotropic Biaxial Nematic Mesophase“. Crystals 9, Nr. 3 (19.03.2019): 158. http://dx.doi.org/10.3390/cryst9030158.

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Nematic phases are some of the most common phases among the lyotropic liquid crystalline structures. They have been widely investigated during last decades. In early studies, two uniaxial nematic phases (discotic, ND, and calamitic, NC) were identified. After the discovery of the third one, named biaxial nematic phase (NB) in 1980, however, some controversies in the stability of biaxial nematic phases began and still continue in the literature. From the theoretical point of view, the existence of a biaxial nematic phase is well established. This review aims to bring information about the historical development of those phases considering the early studies and then summarize the recent studies on how to stabilize different nematic phases from the experimental conditions, especially, choosing the suitable constituents of lyotropic mixtures.
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Fradkin, Eduardo, und Steven A. Kivelson. „Electron Nematic Phases Proliferate“. Science 327, Nr. 5962 (07.01.2010): 155–56. http://dx.doi.org/10.1126/science.1183464.

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Shanker, Govindaswamy, Marko Prehm und Carsten Tschierske. „Liquid-crystalline heterodimesogens and ABA-heterotrimesogens comprising a bent 3,5-diphenyl-1,2,4-oxadiazole central unit“. Beilstein Journal of Organic Chemistry 8 (30.03.2012): 472–85. http://dx.doi.org/10.3762/bjoc.8.54.

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Three new types of terminally connected ABA-heterotrimesogens and heterodimesogens, composed of a bent 3,5-diphenyl-1,2,4-oxadiazole central unit and one or two rod-shaped 4-cyanobiphenyl cores or one 2-phenyl-1,3,4-thiadiazole core, connected by flexible spacers, have been synthesized, and their mesomorphic behavior was studied by optical polarizing microscopy (PM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). All dimesogens exhibit broad ranges of cybotactic nematic phases (NcybA and NcybC), in some cases accompanied by additional mesophases (CybA or SmC) at lower temperature. The combination of the 3,5-diphenyl-1,2,4-oxadiazole unit with one cyanobiphenyl core leads to the removal of tilted smectic and cybotactic nematic phases (SmC, NcybC), which are replaced by the nontilted CybA phases and nematic phases composed of SmA-type clusters (NcybA). The orthogonal cybotactic nematic phases of bent-core mesogens are of special interest for achieving biaxial nematic phases of the orthorhombic type. The orthogonal (NcybA) and skewed (NcybC) cybotactic nematic phases were distinguished by XRD and optical observations.
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Wang, Weiqiang, und Rui Zhang. „Interplay of Active Stress and Driven Flow in Self-Assembled, Tumbling Active Nematics“. Crystals 11, Nr. 9 (04.09.2021): 1071. http://dx.doi.org/10.3390/cryst11091071.

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Lyotropic chromonic liquid crystals (LCLCs) are a special type of hierarchical material in which self-assembled molecular aggregates are responsible for the formation of liquid crystal phases. Thanks to its unusual material properties and bio compatibility, it has found wide applications including the formation of active nematic liquid crystals. Recent experiments have uncovered tumbling character of certain LCLCs. However, how tumbling behavior modifies structure and flow in driven and active nematics is poorly understood. Here, we rely on continuum simulation to study the interplay of extensile active stress and externally driven flow in a flow-tumbling nematic with a low twist modulus to mimic nematic LCLCs. We find that a spontaneous transverse flow can be developed in a flow-tumbling active nematic confined to a hybrid alignment cell when it is in log-rolling mode at sufficiently high activities. The orientation of the total spontaneous flow is tunable by tuning the active stress. We further show that activity can suppress pressure-driven flow of a flow-tumbling nematic in a planar-anchoring cell but can also promote a transition of the director field under a pressure gradient in a homeotropic-anchoring cell. Remarkably, we demonstrate that the frequency of unsteady director dynamics in a tumbling nematic under Couette flow is invariant against active stress when below a threshold activity but exhibits a discontinuous increase when above the threshold at which a complex, periodic spatiotemporal director pattern emerges. Taken together, our simulations reveal qualitative differences between flow-tumbling and flow-aligning active nematics and suggest potential applications of tumbling nematics in microfluidics.
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Ravnik, Miha, und Jun-ichi Fukuda. „Templated blue phases“. Soft Matter 11, Nr. 43 (2015): 8417–25. http://dx.doi.org/10.1039/c5sm01878a.

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We explore the templated blue phases I and II infiltrated with an achiral nematic liquid crystal using numerical modelling, demonstrating novel blue-phase like profiles and predicting a large optical Kerr effect.
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Yu, Gary, und Mark Richard Wilson. „All-atom simulations of bent liquid crystal dimers: the twist-bend nematic phase and insights into conformational chirality“. Soft Matter 18, Nr. 15 (2022): 3087–96. http://dx.doi.org/10.1039/d2sm00291d.

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Atomistic simulations of the liquid crystal dimer, CB7CB, identify the twist-bend nematic phase, show phase transitions to the nematic and isotropic phases, and probe the molecular structure and conformational chirality of molecules in these phases.
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Urban, S., H. Kresse und R. Dąbrowski. „Low Frequency Dielectric Relaxation Process in Liquid Crystals with Nematic and Liquid-Like Smectic Phases“. Zeitschrift für Naturforschung A 52, Nr. 5 (01.05.1997): 403–8. http://dx.doi.org/10.1515/zna-1997-0505.

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Abstract Results of dielectric studies of the low frequency relaxation process in several substances exhibiting nematic -smectic C polymorphism are presented. They are compared with the data obtained re-cently for substances with nematic-smectic A and nematic-smectic B phase sequences. It was found that the rate of molecular reorientation around the short axes does not change at the transition between the nematic and a liquid-like smectic phase (Sm A, Sm C), whereas it is considerably retarded at that of the nematic-solid-like smectic (Sm B) phase. However, the activation barrier for this motion is markedly lower in the orthogonal smectics (Sm A, Sm B) than in the nematic and Sm C phases. The analysis of numerous experimental data on the activation enthalpy in the nematic phase shows that the Arrhenius equation conforms better with results than the Diogo-Martins approach, if the nematic range exceeds 10 K.
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Dissertationen zum Thema "Nematic phases"

1

Huang, Tsang-Min. „Phase Equilibria of Binary Liquid Crystal Mixtures Involving Induced Ordered Phases“. University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1284381816.

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Reid, Andrew Charles Edmund. „Nematic phases in fluids of biaxial particles“. Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27625.

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The investigation of the possible uniaxial phases of a fluid of biaxial particles undertaken by Bergersen, Palffy-Muhoray and Dunmur forms the starting point for further research into the full range of possible phases of such a fluid. A generalization of their interaction model, free from constraints having to do with interaction details, retaining only the biaxial symmetry, is used in the mean-field approximation to explore the range of possible orientationally-ordered phases for such a system. This model is an equilibrium model which does not include dynamic effects. The basic inter-particle interaction is abstract, having the correct symmetry for biaxial particles, and is the most general biaxial interaction constructable from lowest-order scalar invariants. The self-consistent equations resulting from this formulation are obtained in the mean-field approximation and therefore retain both the symmetry and the generality at the cost of exact numerical correctness. Four order parameters are identified, corresponding (within a numerical factor) to those found by Straley and Freiser, as well as those of Bergersen et al. The phase diagram of a fluid of biaxial particles, then, is mapped out in terms of the behavior of these order parameters, as indicated by the self-consistent equations, as a function of three anisotropy parameters and the temperature. The primary method of analysis is iteration of the self-consistent equations obtained from differentiating the free energy. Numerical results are obtained for the location of the phase boundaries, and the temperature dependence of the order parameters in various phases.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
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Shamid, Shaikh M. „STATISTICAL PHYSICS OF MODULATED PHASES IN NEMATIC LIQUID CRYSTALS“. Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1448892923.

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Adhikari, Banani. „Study of physical properties of some liquid crystals having nematic and smectic phases“. Thesis, University of North Bengal, 1995. http://hdl.handle.net/123456789/856.

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Chakraborty, Anish. „Study of physical properties of bent core mesogens having nematic and smectic phases“. Thesis, University of North Bengal, 2017. http://hdl.handle.net/123456789/2647.

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Kundt, Matthias [Verfasser]. „Magnetoresponsive liquid crystalline systems based on elongated core-shell particles in nematic phases / Matthias Kundt“. München : Verlag Dr. Hut, 2018. http://d-nb.info/1162767863/34.

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Prasad, Akhileshwar. „STUDY OF THE INDUCTION OF SMECTIC Ad AND RE-ENTRANT NEMATIC PHASES IN BINARY MIXTURES OF LIQUID CRYSTALS“. Thesis, University of North Bengal, 2013. http://hdl.handle.net/123456789/938.

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Liu, Harry. „Elastic properties and phases of bent core liquid crystal“. Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/elastic-properties-and-phases-of-bent-core-liquid-crystal(1428e685-754c-42c0-890b-9ae83f0b5f7c).html.

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The recent interest in bent core liquid crystal has shown many unique physical properties, such the anomalous behaviour of the elastic constants (SplayK1, Twist K2, and BendK3). In bent core liquid crystals it is observed that K3K1). Such behaviour is analogous to calamitic liquid crystals but is in contrast to all other bent-core nematic materials reported to date. Such a result questions some of the current explanations for the elastic behaviour of bent-core materials. Using molecular field theory and atomistic modelling the different elastic behaviour predicted is again in excellent agreement with experimental results. The bend angle is again shown to be an important part in determining the physical properties of bent-core nematic liquid crystals. In a mixture from an oxadiazole dopant and calamitic host liquid crystal, it was found that a filament structure appears in the nematic phase. The filaments appear to interfere with the measurements for elastic constants. In order to understand the filament structure many methods were used including SAXS, dielectric permittivity, and DSC. It was found that the mixture had formed a gel - like phase. The gel is composed of a liquid crystal network and a liquid crystal background, not seen before in any gel system. Due to the liquid crystalline properties both the network and the background can be aligned and manipulated. The new gel phase can possess many new unique properties which warrant further studies understand further into how fundamentally the phase is forming.
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Al-Zangana, Shakhawan. „Nano- and micro-particle doped liquid crystal phases“. Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/nano-and-microparticle-doped-liquid-crystal-phases(31dbb051-7d9c-4780-bda0-d58773846de0).html.

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This thesis presents the investigation of the liquid crystal (LC) - particle suspensions. Particles from nano- to micro-size, spherical to two-dimensional shapes, with different functionality are dispersed into nematic and smectic phases. The aim is to create ordered nanoparticle (NP) assemblies and thereby modify the common properties of the liquid crystal, such as dielectric anisotropy and electro-optical, revealing any interaction between particles and LC properties. It is found that for concentrations (>0.5vol%), the ferroelectric NPs have increased the sensitivity of the nematic liquid crystal to the electric field through electro-optical responses, which is seen by an enhancement in the dielectric anisotropy. This could be induced by the coupling of the electrical dipole moments in the spherical NPs with the LC director field. The electro-optical properties of the chiral smectic (SmC*) phase (tilt angle Θ, switching time τ_s and spontaneous polarisation P_s) are found to be independent of the concentration and sizes of the doped NPs. The relaxation frequency f_R of the Goldstone mode is faster in the ferroelectric NPs suspensions of 2.0vol% compared to the paraelectric NPs. In the graphene oxide (GO) - nematic LC (5CB) suspensions, the small GO sizes of mean size 560 nm are more easily dispersible than larger flakes of 2.8 micro metre mean size. As the GO concentration is increased, each of the threshold voltage and splay elastic constant dramatically increases, reaching saturation at ≈1.0wt%. The field driven switching-on time is practically not affected, while the purely elastically driven switching-off time is strongly sped-up. Interestingly, thermotropic and lyotropic LC phases are exhibited in the GO-5CB suspensions when heating the thermotropic liquid crystal into its isotropic phase. The isotropic phase of 5CB acts as a solvent for the GO particles, forming a lyotropic nematic phase with largely reduced birefringence. It is found that the nematic to isotropic phase transition is shifted toward higher temperature for the GO-5CB system compared to the BaTiO3-5CB system. Dispersions of different sizes of GO flakes are prepared in isotropic and nematic fluid media. The dielectric relaxation behaviour of GO-dispersions was examined for a wide temperature range (25-60 ℃) and frequency range (100 Hz-2 MHz). The mixtures containing GO flakes were found to exhibit varying dielectric relaxation processes, depending on the size of the flakes and the elastic properties of the dispersant fluid. The relaxation frequencies in the isotropic media were lower compared to the nematic medium. Relaxation frequencies (~10 kHz) are observed in the GO-isotropic media, which are reduced as the size of the GO flakes are decreased, are anticipated to be inherited from GO flakes. However, the fast relaxations (~100 kHz) that are observed in the nematic suspensions could imply strongly slowed down molecular relaxation modes of the nematogenic molecules. Finally, the phase diagram of lyotropic LC as a function of the lateral dimensions of the GO flakes, their concentration, geometrical confinement configuration and solvent polarity was investigated. Polarising optical microscopy was used to determine isotropic-biphasic-nematic phase evolution. The confinement volume and geometry of the sample relative to the GO size are shown to be vital to the observation of the lyotropic phase. GO LCs have the potential for a range of applications from display technologies to conductive fibres. The confinement related LC phase transition is critical toward their applications. It is also found that the stability of the LC phase is higher for the solvent of higher dielectric constant.
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Delikatny, Edward James. „NMR studies of carboxylic acids : an investigation of head group behaviour in lyotropic and nematic phases“. Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26996.

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The orientational order of the methylene segments adjacent to the head group in the lamellar liquid crystalline phase of potassium palmitate/D₂0 was investigated using multinuclear magnetic resonance. Previous studies had shown that the orientational order near the soap--water interface decreased with decreasing temperature, contrary to intuition. To investigate this phenomenon, three isotopically substituted species of palmitic acid were synthesized: palmitic acid-d₃₁, 1-¹³C-2,2-H₂- palmitic acid-d₂₉, and 2,2,3,3-H₄- palmitic acid-d₂₇. These compounds were treated in two complementary fashions: the acids were dissolved in the liquid crystal 4 - (octyloxy) - benzoic acid (p - OOBA) and the corresponding potassium salts were dispersed in D₂0 at a constant water concentration. Dipolar and quadrupolar couplings were obtained from the ¹H, ¹³C, and ²H nmr spectra of these molecules, in nematic and lamellar liquid crystalline phases, as a function of temperature. In a parallel study, nmr spectra of acetic, propionic, and butyric-2,2 - d₂ acids dissolved in p - OOBA were recorded. In order to observe ¹H - ¹H dipolar couplings, a two dimensional spin echo (π/2 - t₁/2 - π - t₁/2 - echo) was necessary to remove heteronuclear dipolar couplings to the chain deuterons. A refocussing pulse applied simultaneously to the spins allowed observation of the heteronuclear ¹H - ¹³C dipolar couplings in the carbon 13 labelled compound. The complete orientational order matrix of the alpha methylene segment of potassium paImitate/D₂0 and of palmitic acid/p - OOBA was determined from the dipolar and quadrupolar couplings. As the temperature is decreased from 110°C to a temperature just above the gel-liquid crystalline phase transition (45°C), the orientation of the methylene segment of potassium palmitate is rotated by 3° towards a configuration in which the first C - C bond is parallel to the bilayer normal. This is in direct agreement with a previous model, the Abdollal model of lipid - water interaction, in which the decrease in orientational order was postulated to be a strictly geometric effect arising from electrostatic interactions of the lipid with the water. A mean field equilibrium statistical mechanical model, based on the Samulski Inertial Frame Model, was developed to simulate the experimental dipolar and quadrupolar nmr couplings. In potassium palmitate, electrostatic interactions, approximately constant at higher temperatures, increase dramatically as the phase transition is approached. In contrast mean field steric repulsive forces remain constant over the entire temperature range studied. This evidence also supports the Abdollal model of lipid - water interaction. The electrostatic interaction was shown to be of greater importance in the orientational ordering of the solutes in the liquid crystal than in potassium palmitate and this was attributed to intermolecular H - bonding between solute and p - OOBA. The ordering of the head group of carboxylic acids dissolved in p - OOBA was demonstrated to be remarkably similar regardless of the chain length of the solute.
Science, Faculty of
Chemistry, Department of
Graduate
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Bücher zum Thema "Nematic phases"

1

Petrov, Minko Parvanov. Optical and electro-optical properties of liquid crystals: Nematic and smecic phases. Hauppauge, N.Y: Nova Science Publishers, 2009.

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Petrov, Minko Parvanov. Optical and electro-optical properties of liquid crystals: Nematic and smectic phases. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Buchteile zum Thema "Nematic phases"

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Longa, Lech. „Landau Theory of Nematic Phases“. In Biaxial Nematic Liquid Crystals, 133–51. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118696316.ch5.

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Bartolino, R., G. Chidichimo, A. Golemme und F. P. Nicoletta. „Phases and Phase Transitions in Nematic Lyotropics“. In NATO ASI Series, 427–38. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-9151-7_27.

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de Jeu, W. H. „Microscopic Aspects of the Nematic Phases“. In NATO ASI Series, 17–27. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-9151-7_2.

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Virga, Epifanio G. „Elasticity of Twist-Bend Nematic Phases“. In Differential Geometry and Continuum Mechanics, 363–80. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18573-6_13.

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Coleman, Bernard D., und James T. Jenkins. „On a Class of Solutions in the Theory of Nematic Phases“. In Nematics, 93–105. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3428-6_7.

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Penc, Karlo, und Andreas M. Läuchli. „Spin Nematic Phases in Quantum Spin Systems“. In Introduction to Frustrated Magnetism, 331–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10589-0_13.

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Chrzanowska, Agnieszka. „Nematic Twist-Bend Phases of Liquid Crystals“. In Springer Proceedings in Physics, 469–77. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56422-7_35.

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Fontana, M. P. „Molecular Dynamics in Nematic Phases: Raman and Infrared Spectroscopy“. In NATO ASI Series, 259–71. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-9151-7_19.

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Riccò, M., und M. P. Fontana. „Molecular Dynamics in Nematic Phases: QENS and NMR Spectroscopy“. In NATO ASI Series, 273–84. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-9151-7_20.

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Sethna, James P. „Theory of the Blue Phases of Chiral Nematic Liquid Crystals“. In Theory and Applications of Liquid Crystals, 305–24. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4613-8743-5_16.

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Konferenzberichte zum Thema "Nematic phases"

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Shibaev, Peter V., R. A. Vinokur, H. J. Deussen, T. Bjornholm und K. Schaumburg. „Twisted nematic phases induced by atropoisomers“. In Liquid Crystals, herausgegeben von Marzena Tykarska, Roman S. Dabrowski und Jerzy Zielinski. SPIE, 1998. http://dx.doi.org/10.1117/12.301282.

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Bauman, Danuta. „Orientational order in nematic phases determined from polarized optical spectroscopy“. In Liquid Crystals: Materials Science and Applications, herausgegeben von Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.215529.

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Jákli, A., M. Chambers, J. Harden, M. Madhabi, R. Teeling, J. Kim, Q. Li et al. „Extraordinary properties of nematic phases of bent-core liquid crystals“. In Integrated Optoelectronic Devices 2008, herausgegeben von Liang-Chy Chien. SPIE, 2008. http://dx.doi.org/10.1117/12.768866.

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4

Jadzyn, Jan, Grzegorz Czechowski, Christian Legrand und Redouane Douali. „Dielectric properties of 6-CHBT in isotropic and nematic phases“. In XIII International Conference on Liquid Crystals: Chemistry, Physics, and Applications, herausgegeben von Stanislaw J. Klosowicz, Jolanta Rutkowska, Jerzy Zielinski und Jozef Zmija. SPIE, 2000. http://dx.doi.org/10.1117/12.385679.

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5

Ayop, Shahrul Kadri, und Keiji Sasaki. „Optical Force Manipulation of Nematic Liquid Crystal Assembly“. In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2018. http://dx.doi.org/10.1364/jsap.2018.18a_211b_2.

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6

Khoo, I. C., R. G. Lindquist, Hong Li, Yu Liang, P. LoPresti und R. Normandin. „Unusual nonlinear optics near the nematic-isotropic phase transition point of liquid crystals“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.fj5.

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Annotation:
In the vicinity of the phase transition temperature, approached from either the nematic of the isotropic phase, pulsed laser-induced individual and collective molecular recorientations, thermal and density fluctuations show interesting critical and dynamic effects. Using a transient dynamic grating technique, the magnitude of the nonlinearities and their rise- and decay-time dependences for both phases have been measured and analyzed by a quantitative nematogen theory. Unusually large and fairly fast nonlinear responses are observed and compared.
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7

Qi, Hao, Brandy Kinkead und Torsten Hegmann. „Effects of functionalized metal and semiconductor nanoparticles in nematic liquid crystal phases“. In Integrated Optoelectronic Devices 2008, herausgegeben von Liang-Chy Chien. SPIE, 2008. http://dx.doi.org/10.1117/12.759473.

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8

Martínez-Ratón, Yuri, Szabolcs Varga, Enrique Velasco, Joaquín Marro, Pedro L. Garrido und Pablo I. Hurtado. „Biaxial nematic and smectic phases of parallel particles with different cross sections“. In MODELING AND SIMULATION OF NEW MATERIALS: Proceedings of Modeling and Simulation of New Materials: Tenth Granada Lectures. AIP, 2009. http://dx.doi.org/10.1063/1.3082322.

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9

Malik, Praveen, und Sumit Yadav. „Synthesis and observation of blue phases in chiral dopant nematic liquid crystal mixtures“. In ADVANCES IN BASIC SCIENCE (ICABS 2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5122511.

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10

Urban, Stanislaw, Eva Novotna, Horst Kresse und Roman S. Dabrowski. „Dielectric relaxation in the nematic and smectic A phases of nPCHB-NCS homologous series“. In Liquid Crystals: Materials Science and Applications, herausgegeben von Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.215523.

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Berichte der Organisationen zum Thema "Nematic phases"

1

Schimming, Cody. Non-equilibrium phases in circularly confined active nematics. Office of Scientific and Technical Information (OSTI), November 2022. http://dx.doi.org/10.2172/1900447.

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2

Ogale, Amod A. Surface Anchoring of Nematic Phase on Carbon Nanotubes: Nanostructure of Ultra-High Temperature Materials. Office of Scientific and Technical Information (OSTI), April 2012. http://dx.doi.org/10.2172/1039158.

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