Academic literature on the topic 'Sensitivity of nematic layers'
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Journal articles on the topic "Sensitivity of nematic layers"
Trabelsi, Youssef, Walid Belhadj, Naim Ben Ali, and Arafa H. Aly. "Theoretical Study of Tunable Optical Resonators in Periodic and Quasiperiodic One-Dimensional Photonic Structures Incorporating a Nematic Liquid Crystal." Photonics 8, no. 5 (May 1, 2021): 150. http://dx.doi.org/10.3390/photonics8050150.
Full textChang, Tsung-Keng, Mon-Juan Lee, and Wei Lee. "Quantitative Biosensing Based on a Liquid Crystal Marginally Aligned by the PVA/DMOAP Composite for Optical Signal Amplification." Biosensors 12, no. 4 (April 7, 2022): 218. http://dx.doi.org/10.3390/bios12040218.
Full textSchell, K. T., and R. S. Porter. "Wave Structures in Nematic Layers." Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics 174, no. 1 (September 1989): 141–51. http://dx.doi.org/10.1080/00268948908042700.
Full textMirantsev, L. V. "Oscillations in thin nematic layers." Liquid Crystals 11, no. 3 (March 1992): 421–30. http://dx.doi.org/10.1080/02678299208029000.
Full textHotra, Z., Z. Mykytyuk, O. Hotra, A. Fechan, O. Syshynskyy, O. Yasynovska, and V. Kotsun. "The Cholesteric-Nematic Transition in Thin Layers of Nematic-Cholesteric Mixtures." Molecular Crystals and Liquid Crystals 534, no. 1 (January 13, 2011): 32–40. http://dx.doi.org/10.1080/15421406.2010.526565.
Full textLeenhouts, F., and M. Schadt. "Optics of Twisted Nematic Liquid Crystal Layers." Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics 158, no. 2 (May 1988): 241–53. http://dx.doi.org/10.1080/00268948808076144.
Full textWagner, Wilfred L. "Chiral-Nematic Layers With Asymmetric Boundary Coupling." Molecular Crystals and Liquid Crystals 209, no. 1 (December 1991): 85–92. http://dx.doi.org/10.1080/00268949108036181.
Full textSparavigna, A., L. Komitov, P. Palffy-Muhoray, and A. Strigazzi. "Bend-stripes in hybrid aligned nematic layers." Liquid Crystals 14, no. 6 (January 1993): 1945–52. http://dx.doi.org/10.1080/02678299308027730.
Full textSchiller, P. "Perturbation theory for planar nematic twisted layers." Liquid Crystals 4, no. 1 (January 1989): 69–78. http://dx.doi.org/10.1080/02678298908028959.
Full textHoogboom, Johan, Theo Rasing, Alan E. Rowan, and Roeland J. M. Nolte. "LCD alignment layers. Controlling nematic domain properties." J. Mater. Chem. 16, no. 14 (2006): 1305–14. http://dx.doi.org/10.1039/b510579j.
Full textDissertations / Theses on the topic "Sensitivity of nematic layers"
Воробйов, Владислав Євгенійович. "Оптичні рідкокристалічні сенсори." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/35117.
Full textThesis is devoted to improving the efficiency of one of the main executive elements of electronics. Introduction to the main characteristics of sessors. Analysis of ways to optimize the technical parameters of liquid crystal pressure gradient sensors. Analysis of liquid crystal sensors of acceleration, vibration and inclusion. The paper considers many types of sensors and prefers the optical liquid crystal sensor due to the easy unification of its construction and widespread use in the home. Using the properties of liquid crystal materials, it was possible to achieve extremely sensitive sensing sensors.
Lindsay, R. I. "Shear in nematic liquid crystal layers." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296747.
Full textMottram, N. J. "Boundary effects in nematic liquid crystal layers." Thesis, University of Bristol, 1996. http://hdl.handle.net/1983/3f718f68-e280-4994-afa2-29a7845c73f7.
Full textMasad, Sanaa Ahmad. "Sensitivity analysis of flexible pavement response and AASHTO 2002 design guide for properties of unbound layers." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/528.
Full textLavergne, Thomas. "Modélisation analytique et caractérisation expérimentale de microphones capacitifs en hautes fréquences : étude des couches limites thermiques, effets des perforations de l’électrode arrière sur la déformée de membrane." Thesis, Le Mans, 2011. http://www.theses.fr/2011LEMA1020/document.
Full textCondenser microphones are reciprocal transducers whose properties (sensitivity, bandwidth and reliability) make them powerful measurement tools. So far, they have been commonly used as receivers in the audible frequency range, in air at atmospheric pressure and ambient temperature, they have been appropriately characterised in this context for nearly thirty years. But nowadays, their miniaturisation (using MEMS processes) and their new use for metrological purposes (as receivers as well as transmitters) require much deeper theoretical and experimental characterisations because they require an accurate knowledge of their behaviour in high frequency ranges (up to 100 kHz), in gas mixtures, whose properties differ from those of air, and under pressure and temperature conditions much higher or much lower than standard conditions. Thus, here, -i/ the effects of the thermal boundary layers are introduced in the model (only viscous boundary layers are usually accounted for), leading, in the first chapter, to an analysis of the thermal diffusion of thin bodies (whose scope is beyond the strict frame of capacitive transducers), ii/ the influence of the holes in the backing electrode on the dynamic behaviour of the membrane is initially handled with an original analytical method which allows expressing the non-uniform boundary conditions at the surface of the backing electrode as fictitious localised sources associated to uniform boundary conditions (second chapter), -iii/ new analytical solutions, depending both on the radial and azimuthal coordinates, for the pressure field and for the displacement field inside the cavities behind the membrane are expressed using modal theories in agreement with the strong couplings which occur between the different parts of the transducer (chapter three), -iv/ "lumped element circuits", which are more or less approximated (presented in the Appendix), more particularly result in expressing and assessing the sensitivity and the thermal noise (end of chapter three), -v/ experimental results, obtained from measurements of the displacement field of the membrane using a laser scanning vibrometer, both highlight and quantify for the first time the complex behaviour of the membrane in the highest frequency range, and finally lead to the validation of the theoretical results and therefore, the models presented here (even if the latter may still be improved as outlined in the conclusion)
Huang, Hsin-Yi, and 黃馨儀. "Investigation of Ionic Properties of Liquid Crystal and Polyimide-alignment Layers in Twisted Nematic Liquid Crystal Cells." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/mcn8a9.
Full text國立交通大學
影像與生醫光電研究所
103
In this thesis, we have studied ionic effects within rubbed-ITO-aligned and rubbed polyimide（PI）-aligned twisted nematic（TN）liquid crystal（LC）cells using a same nematic LC mixture. In our experiments, we have used heterodyne-phase-measurement method, and a LCR meter to measure the TN cells containing the same nematic LC mixture. The analytic equations were based on the ion generation and transport equations developed by T.-C. Chieu and K.-H. Yang for the investigation of ionic properties in ferroelectric LC cells. The ionic physical parameters of high-ionization-rate（HIR）and low-ionization-rate（LIR）impurities within the TN LC mixture and PI alignment layers were obtained by fitting experimental data to analytic equations. We have derived HIR and LIR ion concentrations, ionic mobility and activation energies of ions from ionic impurities in the TN LC mixture, and PI alignment layers. Good agreements between experimental results and theoretical analyses have been demonstrated. The results of our investigation have shown that both HIR and LIR ions existed in the rubbed-ITO-and rubbed-PI-aligned TN cells containing the same nematic LC mixture. The derived HIR and LIR ionic properties were different between the rubbed-ITO -aligned and the rubbed-PI-aligned TN cells implying that the PI alignment layers have contributed a substantial amount of ions for the latter. The methods reported in this thesis can explain the phenomenon of field-driven net mobile ions accumulated at the interfaces between the LC mixture and the PI alignment layers of the TN cell. With further investigations, we hope to apply our results to the identifications and reductions of ion generating chemical species within TN cells to improve the quality of TN LC displays.
Shiu, Siao-Ching, and 徐曉晴. "Investigation of Ionic Phenomena in the LC Mixtures and Rubbed Polyimide Aligned Layers of Twisted Nematic Liquid Crystal Cells." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/72441659321750987486.
Full text國立交通大學
影像與生醫光電研究所
101
Ion concentration, mobility and activation energy in liquid crystal cells are three most important parameters to affect the display qualities of LCDs in terms of threshold voltage, gray-level shift, charge holding ratio, flickers, image-sticking, and Mura. In this thesis, we, first, measured the phase relaxation of a TN cell under low-frequency voltage square wave at an amplitude equal to the middle gray level of the TN sample aligned by rubbed polyimide (PI) films at different temperatures to find out if the dominant ionic species are from the LC mixture (DMR, Depressed Molecular Reorientation) or from the PI layers (EMR, Enhanced Molecular Reorientation). Then, we used our newly developed methods to measure and analyze the data of voltage-holding-ratios (VHRs) of DMR and EMR TN cells at different temperatures to determine the ion concentration, the mobility and the activation energies of ion-dissociation rate of high-ionization-rate (HIR) and low-ionization-rate (LIR) impurities where the dominant ions were either from the LC mixture or PI layers of the TN cell. In the case that dominant ions were from the LC mixture of the TN cell, we have also determined the activation energies of ionic mobility of LIR impurities. Prior publications on the measurement of ion concentration and mobility did not distinguish ions either from HIR or LIR impurities. Our group have developed experimental and analytic methods to determine both mobility and ion concentration of HIR and LIR impurities in TN LCDs aligned by rubbed polyimide film, and found out recently that the dominant ionic species in LC mixture in a DMR sample came from impurities of low-ionization-rate(LIR). However, for the first time, we have also observed that both ions from HIR and LIR impurities existed in different DMR TN samples. We have also carried out the investigation for the case when an applied voltage of 5 V was applied to the DMR TN sample to orient the directors of LC molecules parallel to the applied electric field. However, the derived physical parameters on ions were quite different from those when 1 V was applied to the TN cell. In this thesis, we have observed and confirmed that ions from HIR and LIR impurities also existed in the rubbed PI alignment layers of TN cells exhibiting EMR behavior. For the first time in the world, we have successfully extended our methods of measurements and analyses to solve the EMR cases where the dominant ions are from the polyimide alignment layers of the TN cell. We have no knowledge where theses HIR and LIR impurities in the rubbed PI films came from. But we believe that, by applying our experimental and analytical methods reported in this thesis to investigate the TN cells made of LC mixtures of different concentration of key components and/or different PI material and process, we may find out the origins and the chemical structures of ions from HIR and LIR impurities existing in these EMR and DMR TN samples. The results of further investigation will lead us to develop PI alignment layers and LC mixtures without HIR and LIR impurities, and ultimately, the realization of low-power-consumption, high-display-quality TFT-LCDs free of flickers and image-sticking.
Chang, Ueinn-chang, and 張原彰. "A system for high sensitivity measurement of twisted nematic liquid crystal display cell gap by using a photo-elastic modulator." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/58126896303547303290.
Full textTu, Li-Ping, and 杜麗萍. "High-Sensitivity Planar Si-Based MSM Photodetector with Very Thin Amorphous Silicon-Alloy Quantum-Well-Like Barrier Layers." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/96627656920503519878.
Full text國立中央大學
電機工程研究所
91
Abstract The planar Si-based metal-semiconductor-metal photodetectors (MSM-PDs) with a-Si:H/a-SiC:H (or a-Si:H/a-SiGe:H) multi-layers to reduce device dark current had been studied. For the ones with a-Si:H/a-SiC:H multi-layers, their sensitivity could be enhanced very effectively. Under a very weak incident light power (0.5 μW) and with a 4 V bias-voltage, the device photo- to dark- current ratio (Ip/Id) could be 103 times higher than that of the previously reported one. Also, the average full-width-at-half-maximum (FWHM) and fall-time of the device temporal response were 68.18 and 294.7 ps, respectively, as measured with a periodic 0.83μm 60 ps light pulse and a 10 V bias-voltage. Comparing to the previously reported various Si-based PDs, this device exhibited significant improvements in device sensitivity and temporal-response due to the employed quantum-well-like amorphous silicon-alloy barrier layers. Moreover, the Si-based MSM-PDs with a-Si:H/a-SiGe:H multi-layers also had been investigated. The effects of multi-layer thickness and structure, and H2-plasma treatment of a-SiGe:H films on device performances had been studied also.
Books on the topic "Sensitivity of nematic layers"
Plesniak, M. W. Sensitivity of the structure of untripped mixing layers to small changes in initial conditions. Stanford, CA: Stanford University, Dept. of Aeronautics and Astronautics ; [Washington, DC, 1992.
Find full textPlesniak, M. W. Sensitivity of the structure of untripped mixing layers to small changes in initial conditions. Stanford, CA: Stanford University, Dept. of Aeronautics and Astronautics ; [Washington, DC, 1992.
Find full textHayazawa, Norihiko, and Prabhat Verma. Nanoanalysis of materials using near-field Raman spectroscopy. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533053.013.10.
Full textBook chapters on the topic "Sensitivity of nematic layers"
Currie, P. K., and F. M. Leslie. "Static Shear Layers in Nematic Liquid Crystals." In The Breadth and Depth of Continuum Mechanics, 595–607. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-61634-1_28.
Full textMargaritis, Athanasios T., Taraneh Sayadi, Olaf Marxen, and Peter J. Schmid. "Sensitivity of Reacting Hypersonic Boundary Layers to n-periodic Surface Roughness." In IUTAM Laminar-Turbulent Transition, 599–612. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67902-6_52.
Full textDemirov, Encho, Mohammed A. Latif, and Vasile Diaconu. "Physical Processes of Surface-Deep Layers Exchange in the Black Sea." In Sensitivity to Change: Black Sea, Baltic Sea and North Sea, 285–94. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5758-2_23.
Full textSendova-Vassileva, M., M. Nikolaeva, O. Angelov, A. Vutchkov, D. Dimova-Malinovska, and J. C. Pivin. "Application Of SiO2:Re Layers For Improvement Of The UV Sensitivity Of a-Si:H Solar Cells." In Photovoltaic and Photoactive Materials — Properties, Technology and Applications, 329–32. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0632-3_33.
Full textIno, S., S. Hasegawa, H. Matsumoto, and H. Daimon. "High Sensitivity Detection of a Few Atomic Layers of Adsorbate by RHEED-TRAXS (Total Reflection Angle X-Ray Spectroscopy)." In Springer Series in Surface Sciences, 334–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73343-7_55.
Full textAlbarici, A., J. A. Mann, J. B. Lando, J. Chen, H. Vithana, D. Johnson, and Masa-aki Kakimoto. "Langmuir-Blodgett Film as Alignment Layers for Nematic Liquid Crystal Displays." In Micelles, Microemulsions, and Monolayers, 543–78. Routledge, 2018. http://dx.doi.org/10.1201/9780203747339-26.
Full textLando, Jerome B., J. Adin Mann, Andy Chang, Chin-Jen S. Tseng, and David Johnson. "Conducting Polymers as Alignment Layers and Patterned Electrodes for Twisted Nematic Liquid Crystal Displays." In Conductive Polymers and Plastics, 254–58. Elsevier, 1999. http://dx.doi.org/10.1016/b978-188420777-8.50036-9.
Full textAlqassas, Ahmad. "Licensing Negative Concord Items." In A Unified Theory of Polarity Sensitivity, 107–70. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197554883.003.0004.
Full textLiu, Kunxiang, and Baoyun Wang. "Gully Identification of Debris Flow Disaster Based on Knowledge Distillation." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220043.
Full textManning, Jane. "HANS WERNER HENZE (1926–2012)Three Auden Songs (1983)." In Vocal Repertoire for the Twenty-First Century, Volume 1, 125–27. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780199391028.003.0036.
Full textConference papers on the topic "Sensitivity of nematic layers"
Pasquerella, Dean A., and Ann M. Anderson. "A Comparison of Chiral Nematic and Cholesteric Thermochromic Liquid Crystals for Use in a Light Transmission Based Temperature Sensing System." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41855.
Full textCsillag, L., I. Janossy, V. F. Kitaeva, N. Kroo, and N. N. Sobolev. "Nonlinear Total Internal Reflection In Nematic Layers." In Symposium Optika '84, edited by Gabor Lupkovics and Andras Podmaniczky. SPIE, 1985. http://dx.doi.org/10.1117/12.942435.
Full textKowerdziej, Rafal, Janusz Parka, Marek Olifierczuk, and Leszek Jaroszewicz. "Simulation of tunable metamaterial with nematic liquid crystal layers." In 2012 19th International Conference on Microwaves, Radar & Wireless Communications (MIKON 2012). IEEE, 2012. http://dx.doi.org/10.1109/mikon.2012.6233502.
Full textDerfel, Grzegorz. "Review of the one-dimensional deformations in nematic layers." In Liquid Crystals: Materials Science and Applications, edited by Jozef Zmija. SPIE, 1995. http://dx.doi.org/10.1117/12.215530.
Full textKrzyzanski, Dariusz, and Grzegorz Derfel. "Numerical investigations of spatially periodic deformations in selected nematic layers." In XIV Conference on Liquid Crystals, Chemistry, Physics, and Applications, edited by Jolanta Rutkowska, Stanislaw J. Klosowicz, and Jerzy Zielinski. SPIE, 2002. http://dx.doi.org/10.1117/12.472152.
Full textAgashkov, Alexander, Anatoliy Kovalev, and Janusz Parka. "Dynamic photorefractivity in nematic liquid crystal panels with photoconducting polymeric layers." In SPIE Proceedings, edited by Jozef Zmija. SPIE, 2004. http://dx.doi.org/10.1117/12.581130.
Full textFelczak, Mariola, and Grzegorz Derfel. "Effect of ionic charge on flexoelectric deformations in planar nematic layers." In SPIE Proceedings, edited by Jozef Zmija. SPIE, 2004. http://dx.doi.org/10.1117/12.581133.
Full textKrzyzanski, Dariusz, and Grzegorz Derfel. "Director distribution in periodically deformed planar nematic layers subjected to magnetic field." In XIII International Conference on Liquid Crystals: Chemistry, Physics, and Applications, edited by Stanislaw J. Klosowicz, Jolanta Rutkowska, Jerzy Zielinski, and Jozef Zmija. SPIE, 2000. http://dx.doi.org/10.1117/12.385685.
Full textWood, Emma L., G. W. Bradberry, P. S. Cann, and J. Roy Sambles. "Determination of azimuthal anchoring energy in grating-aligned twisted nematic liquid crystal layers." In Liquid Crystals, edited by Jolanta Rutkowska, Stanislaw J. Klosowicz, Jerzy Zielinski, and Jozef Zmija. SPIE, 1998. http://dx.doi.org/10.1117/12.299984.
Full textDumitraşcu, Leonaş, Irina Dumitraşcu, and Dana-Ortansa Dorohoi. "External Electrostatic Field Influence on the Order Parameter of Nematic Liquid Crystalline Thin Layers." In SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP, 2007. http://dx.doi.org/10.1063/1.2733164.
Full textReports on the topic "Sensitivity of nematic layers"
Lee, Jusang, John E. Haddock, Dario D. Batioja Alvarez, and Reyhaneh Rahbar Rastegar. Quality Control and Quality Assurance of Asphalt Mixtures Using Laboratory Rutting and Cracking Tests. Purdue University, 2019. http://dx.doi.org/10.5703/1288284317087.
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