Relevant bibliographies by topics / Liquid crystal type sensors

Academic literature on the topic 'Liquid crystal type sensors'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Liquid crystal type sensors"

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Nazarava, K. U., and V. I. Navumenka. "Mid-infrared gas sensors of liquid crystal type." Ultramicroscopy 105, no. 1-4 (November 2005): 204–8. http://dx.doi.org/10.1016/j.ultramic.2005.06.037.

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Beck, Elizabeth R., and Gillian M. Greenway. "Computer-aided design of liquid crystal type macrocycles for sensors." Analytical Proceedings including Analytical Communications 32, no. 8 (1995): 313. http://dx.doi.org/10.1039/ai9953200313.

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Petriashvili, Gia, Mauro Daniel Luigi Bruno, Maria Penelope De Santo, and Riccardo Barberi. "Temperature-tunable lasing from dye-doped chiral microdroplets encapsulated in a thin polymeric film." Beilstein Journal of Nanotechnology 9 (January 31, 2018): 379–83. http://dx.doi.org/10.3762/bjnano.9.37.

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In the last decade, much interest has grown around the possibility to use liquid-crystal droplets as optical microcavities and lasers. In particular, 3D laser emission from dye-doped cholesteric liquid crystals confined inside microdroplets paves the way for many applications in the field of sensors or tunable photonics. Several techniques can be used to obtain small microresonators as, for example, dispersing a liquid crystal inside an immiscible isotropic fluid to create an emulsion. Recently, the possibility to obtain a thin free-standing film starting from an emulsion having a mixture of water and polyvinyl alcohol as isotropic matrix has been reported. After the water evaporation, a polymeric film in which the microdroplets are encapsulated has been obtained. Bragg-type laser emission has been recorded from the emulsion as well as from the thin film. Here, we report on the possibility to tune the laser emission as a function of temperature. Using a chiral dopant with temperature dependent solubility, the emitted laser wavelength can be tuned in a range of 40 nm by a temperature variation of 18 °C. The proposed device can have applications in the field of sensors and for the development of anti-counterfeiting labels.
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Yoshioka, Tomohiko, Toshiyuki Ikoma, Akira Monkawa, Toru Tonegawa, Dinko Chakarov, B. Kasemo, Nobutaka Hanagata, and M. Tanaka. "Protein Adsorption on Hydroxyapatite Nano-Crystals with Quartz Crystal Microbalance Technique." Key Engineering Materials 361-363 (November 2007): 1119–22. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.1119.

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Real time adsorption behaviors of six proteins with different isoelectric points on hydroxyapatite (HAp) nanocrystal surfaces have been investigated by using HAp sensors for quartz crystal microbalance with dissipation technique (QCM-D). The dissipation (D)–frequency (f) plots clearly showed that the different types of protein adsorption behaviors; the D-f plots of acidic proteins lie on one straight line with a constant slope under all initial protein concentrations, while those of neutral and basic proteins lie on two straight lines with different slopes. The acidic proteins formed a monolayer, while the neutral and basic proteins could cause conformational changes with the adsorbed amount of proteins. The QCM-D technique with novel HAp nanocrystal sensor is useful for the liquid phase changes of proteins on the surface.
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Iswanto, Iswanto, Alfian Ma’arif, Bilah Kebenaran, and Prisma Megantoro. "Design of gas concentration measurement and monitoring system for biogas power plant." Indonesian Journal of Electrical Engineering and Computer Science 22, no. 2 (May 1, 2021): 726. http://dx.doi.org/10.11591/ijeecs.v22.i2.pp726-732.

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Biogas is a gas obtained from the breakdown of organic matter (such as animal waste, human waste, and plants) by methanogenic bacteria in an oxygen-free (anaerobic) state. The biogas produced mainly consists of 50-70% methane, 30-40% carbon dioxide, and other gases in small amounts. The gas produced has a different composition depending on the type of animal that produces it. It is challenging to obtain biogas concentration data because the monitoring equipment is currently minimal. Therefore, this research discusses how to make a monitoring system for biogas reactors. Sensors are installed in the digester tank and storage tank. The installed sensors are the MQ-4 sensor to detect methane gas (CH<sub>4</sub>), MG-811 sensor to detect carbon dioxide (CO<sub>2</sub>) gas, MQ-136 sensor to detect sulfide acid gas (H<sub>2</sub>S), and Thermocouple Type-K to detect temperature. The sensor will send a signal to the control unit in Arduino Mega 2560, then processed and displayed on the liquid crystal display (LCD). The sensor calculation results' accuracy is not much different from the reference based on the sensor readings. The sensor deviation standard is below 5.0, indicating that the sensor is in precision. The sensor's linearity of MQ-4 is 0.7%, the MG-811 is 0.17%, the MQ-136 is 0.29%, and the Type-K Thermocouple is 1.19%. The installed sensor can be used to monitor gas concentration and temperature in a biogas reactor.
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Voinova, Marina V. "On Mass Loading and Dissipation Measured with Acoustic Wave Sensors: A Review." Journal of Sensors 2009 (2009): 1–13. http://dx.doi.org/10.1155/2009/943125.

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We summarize current trends in the analysis of physical properties (surface mass density, viscosity, elasticity, friction, and charge) of various thin films measured with a solid-state sensor oscillating in a gaseous or liquid environment. We cover three different types of mechanically oscillating sensors: the quartz crystal microbalance with dissipation (QCM-D) monitoring, surface acoustic wave (SAW), resonators and magnetoelastic sensors (MESs). The fourth class of novel acoustic wave (AW) mass sensors, namely thin-film bulk acoustic resonators (TFBARs) on vibrating membranes is discussed in brief. The paper contains a survey of theoretical results and practical applications of the sensors and includes a comprehensive bibliography.
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Egorov, A. A., L. A. Sevastyanov, V. D. Shigorin, A. S. Ayriyan, and E. A. Ayriyan. "Properties of nematic LC planar and smoothly-irregular waveguide structures: research in the experiment and using computer modeling." Computer Optics 43, no. 6 (December 2019): 976–82. http://dx.doi.org/10.18287/2412-6179-2019-43-6-976-982.

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Nematic liquid crystal planar and smoothly-irregular waveguide structures were studied experimentally and by the computer modeling. Two types of optical smoothly-irregular waveguide structures promising for application in telecommunications and control systems are studied by numerical simulation: liquid crystal waveguides and thin film solid generalized waveguide Luneburg lens. Study of the behavior of these waveguide structures where liquid crystal layer can be used to control the properties of the entire device, of course, promising, especially since such devices are also able to perform various sensory functions when changing some external parameters, accompanied by a change in a number of their properties. It can be of interest to researchers not only in the field of the integrated optics but also in some others areas: nano-photonics, optofluidics, telecommunications, and control systems. The dependences of the attenuation coefficient (optical losses) of waveguide modes and the effective sizes (correlation radii) of quasi-stationary irregularities of the liquid-crystal layers on the linear laser radiation polarization and on the presence of pulse-periodic electric field were experimentally observed. An estimate was made of the correlation radii of liquid-crystal waveguide quasi-stationary irregularities. The obtained results are undoubtedly important for further research of waveguide liquid crystal layers, both from the theoretical point of view, and practical – in the organization and carrying out new experimental researches, for example, when developing promising integrated-optical LC sensors.
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Huang, Chia-Yi, and Shih-Hung Lin. "Organic Solvent Sensors Using Polymer-Dispersed Liquid Crystal Films with a Pillar Pattern." Polymers 13, no. 17 (August 29, 2021): 2906. http://dx.doi.org/10.3390/polym13172906.

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An organic solvent sensor of polymer-dispersed liquid crystals (PDLCs) film is fabricated by a combination of tri-functional monomers and LCs. When the patterned PDLC film comes into contact with the organic solvent, the organic solvent will penetrate into the film to induce the orientation of the liquid crystals, which will change from an ordered to a disordered state, which causes the PDLC film to scatter incident light. The experiment used acetone and ethanol as the organic solvents of interest. The results show that the patterned PDLC film has a stronger response to acetone than to ethanol. Based on the difference in the intensity of light scattering and the response time of the patterned PDLC film to different organic solvents, the results can be used to identify and recognize different types of organic solvents.
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Zhu, Chu, and Gary M. Hieftje. "A New Liquid-Crystal-Based Fiber-Optic Temperature Sensor." Applied Spectroscopy 43, no. 8 (November 1989): 1333–36. http://dx.doi.org/10.1366/0003702894204128.

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A new fiber-optic temperature sensor has been developed, based upon selective reflection from a cholesteric liquid crystal. The change of reflected-light intensity can be 40 times larger than background over a temperature range of only 0.4°C. For the demonstrated system, the temperature at which maximum reflection occurred was at 14.578°C, with a standard deviation of 0.026°C. The relative standard deviation of the peak reflected-light intensity was 7.1%. The dependence of the magnitude of reflection and that of peak temperature on the heating rate were studied. The response time of the present sensor is about 2 s, but it could be shortened with slight design modifications. Each sensor of the new type should be applicable to temperature sensing or control over a temperature range of about 1°C.
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Wang, Tiesheng, Meisam Farajollahi, Yeon Sik Choi, I.-Ting Lin, Jean E. Marshall, Noel M. Thompson, Sohini Kar-Narayan, John D. W. Madden, and Stoyan K. Smoukov. "Electroactive polymers for sensing." Interface Focus 6, no. 4 (August 6, 2016): 20160026. http://dx.doi.org/10.1098/rsfs.2016.0026.

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Electromechanical coupling in electroactive polymers (EAPs) has been widely applied for actuation and is also being increasingly investigated for sensing chemical and mechanical stimuli. EAPs are a unique class of materials, with low-moduli high-strain capabilities and the ability to conform to surfaces of different shapes. These features make them attractive for applications such as wearable sensors and interfacing with soft tissues. Here, we review the major types of EAPs and their sensing mechanisms. These are divided into two classes depending on the main type of charge carrier: ionic EAPs (such as conducting polymers and ionic polymer–metal composites) and electronic EAPs (such as dielectric elastomers, liquid-crystal polymers and piezoelectric polymers). This review is intended to serve as an introduction to the mechanisms of these materials and as a first step in material selection for both researchers and designers of flexible/bendable devices, biocompatible sensors or even robotic tactile sensing units.
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Dissertations / Theses on the topic "Liquid crystal type sensors"

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Воробйов, Владислав Євгенійович. "Оптичні рідкокристалічні сенсори." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/35117.

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Дипломна робота присвячена питанням підвищення ефективності одного з основних виконавчих елементів електроніки. Ознайомлення з основними характеристиками сесорів. Аналіз шляхів оптимізації технічних параметрів датчиків рідкокристалічного градієнта тиску. Аналіз рідких кристальних сензорів акселерації, вібрацій і включення. У роботі розглянуто башато типів сенсорів та віддано перевашу оптичному рідкокристалічному сесору в зв’язку з легкою уніфікаціею його конструкції та широким використанням в побуті. Використовуючи властивості рідкокристалічних матеріалів вдалося досягти надзвичано чутливих ті презиційних сенсорів.
Thesis 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.
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Lu, Jiahui. "Designing wavefront sensors from liquid crystal microlenses." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707989.

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Finnemeyer, Valerie A. "Development of Liquid Crystal Infrared Imaging Sensors." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1463139065.

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Mak, Hin Yu. "New type transflective liquid crystal displays /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?ECED%202008%20MAKH.

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Drake, Philip. "The development of quartz crystal microbalance based chemical sensors." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323573.

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Haddock, Joshua Naaman. "Liquid Crystal Based Electro-Optic Diffractive Spectacle Lenses and Low Operating Voltage Nematic Liquid Crystals." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1304%5F1%5Fm.pdf&type=application/pdf.

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El, Hankari Samir. "Silices hybrides nanostructurées par 'Liquid Crystal Templating' de précurseurs ioniques." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20016/document.

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Une série de précurseurs contenant des sous-structures organo-ioniques à base d'entités imidazolium, guanidinium, ammonium et zwitterionique ainsi que des précurseurs neutres contenant des sous-structures amido-thiol, amine-thiol et amine a été synthétisée. Ces précurseurs ont été utilisés pour la synthèse de matériaux silices hybrides nanostructurés par voie template. La formation de matériaux nanostructurés a été réalisée par des réactions d'hydrolyse-polycondensation par l'utilisation de différents agents de structuration. Ce travail avait pour but la détermination des principaux facteurs influençant la structuration des matériaux. Ainsi, nous avons préparé une série d'ionosilicates nanostructurés par une nouvelle méthode de structuration qui met en jeu des interactions spécifiques entre des paires d'ions ‘précurseur cationique - surfactant anionique' et ‘précurseur anionique - surfactant cationique'. Cette approche a permis d'accéder aux matériaux originaux de type PMO ionique. Finalement, nous avons utilisé pour la première fois des surfactants de guanidinium comme ‘template' dans la synthèse des silices ioniques nanostructurées de morphologie sphérique. Les matériaux nanostructurés contenant des sous-structures amine, amine-thiol, ammonium et zwitterionique développés au cours de ce travail présentent des surfaces spécifiques élevées et une bonne accessibilité des sites organiques. Ces propriétés font de ces matériaux des systèmes de choix pour des applications en catalyse ou en séparation
A series of precursors containing organo-ionic substructures such as imidazolium, guanidinium, ammonium and zwitterionic entities and several neutral precursors containing thiol-amide, thiol-amine and amino groups were successfully synthesized. These precursors were used for the synthesis of nanostructured silica hybrid materials containing ionic substructures via soft templating approaches. The formation of structured materials was achieved using template directed hydrolysis polycondensation procedures in the presence of various structure directing agents. The goal of this study was the determination of the parameters influencing the structuring of the materials. Thus, we prepared a series of nanostructured ionosilicates using a new method of structuring that is based on specific interactions between ‘cationic precursor - anionic surfactant' and ‘anionic precursor - cationic surfactant' ion pairs. This new strategy allowed the synthesis of ionic 'periodic mesoporous organosilicas'. At the end of this thesis, we used a new ‘guanidinium' type template in the preparation of nanostructured i-silica hybrid materials with a spherical morphology. Nanostructured ionosilicates bearing amine, amino-thiol, ammonium and zwitterionic substructures prepared in this work present high specific surface areas and a high accessibility of the organic functional sites. Due to these features, these materials have large potential in the fields of catalysis and separation
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Murakami, Takahide. "Antiadhesion effect of the C17 glycerin ester of isoprenoid-type lipid forming a nonlamellar liquid crystal." Kyoto University, 2019. http://hdl.handle.net/2433/242411.

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Byun, Albert Joonsoo. "Chemical Application of Silicon-Based Resonant Microsensor." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16296.

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The detection of volatile organic compounds in liquid is of interest for applications in public health, workplace safety and environmental monitoring. Traditionally, water samples were taken and analyzed in the laboratory using classical laboratory instrumentation. Current trends target real-time measurements using e.g. chemical microsensors built with microfabrication technologies. Among these, mass-sensitive chemical sensors, based on cantilever beams or surface acoustic devices, have shown substantial promise in gas-phase applications. In a liquid environment, the resonant microstructures typically suffer from high damping, which negatively affects the sensor resolution. In this work, a novel disk-type resonator developed at Georgia Tech was investigated as chemical microsensor for liquid-phase applications. The micromachined resonator vibrates in a rotational in-plane mode shape, reducing damping in a liquid environment. As part of the present research, a measurement setup with a custom-made flow cell for liquid-phase chemical measurements and a coating system to locally deposit polymer sensitive films onto the resonators were developed. To improve the film adhesion on the resonator surface in liquid, physical and chemical binding techniques were developed and tested on wafer samples. Polymers such as poly(4-vinylpyrrolidone), poly(ethylene-co-propylene) and poly(styrene-co-butadiene) were deposited using the custom-designed coating system onto the disk-type resonators. Liquid-phase measurements using tetrachloroethylene as the chemical analyte were performed. The experimental results are discussed, sources of problems are identified and recommendations for future research are made.
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LI, ZHE. "Photocyclodehydrofluorination (PCDHF) –A synthetic method for fluorinated polynuclear aromatic hydrocarbons." Kent State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1448814689.

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Books on the topic "Liquid crystal type sensors"

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Liquid Crystal Sensors. Taylor & Francis Group, 2017.

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R, Chalamala Babu, ed. Flat-panel displays and sensors: Principles, materials, and processes : symposium held April 4-9, 1999, San Francisco, California, U.S.A. Warrendale, Pa: Materials Research Society, 2000.

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Sidney, Roberts A., and Langley Research Center, eds. New devices for flow measurements: Hot film and burial wire sensors, infrared imagery, liquid crystal, and piezo-electric model : final report for the period ended May 15, 1990. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

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Dowling, Peter Damian. Optimisation of electrically augmented liquid phase separation: Divergent electrostatic fields are used to coalesce vertically flowing water-in-oil type dispersions. Equipment for assessing on-line entrainment sensors is used to evaluate a microwave device. Bradford, 1986.

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Maltisovs, Matīss. Operating Methods of High Voltage Bistable Smart Glass Electronics Systems. RTU Press, 2022. http://dx.doi.org/10.7250/9789934227448.

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The Thesis focuses on Smectic-A (SmA) liquid crystals' (LCs) functional behaviour in order to understand if this will be the next generation product that could improve the daily life of the society. The optical properties of this liquid crystal are by far the best compared to the products available in the market, i.e., the light transmittance in transparent state is >85 % and in scatter state <2 %. Enabling the LC to be used for a variety of purposes, such as smart windows to scatter light on a sunny day or provide a sense of privacy in an open type office space. An in-depth literature review discusses the existing studies, obtained experimental data and attempts to develop functional products. The main unresolved problems are highlighted, described in detail and solutions are offered. In order to understand the potential of SmA LC in the smart glass/window technology, analysis of existing products was performed, a summary of an active smart glass/windows provided, and a comparative study between them was made. In addition, an in-depth study of long-term functional stability was performed during which the most popular types of defects were listed and analysed. Solutions for defect elimination and recommendations for optimization of switching systems and production processes are provided. A methodology for determining the electrical parameters of an LC has been developed in order to create an electrical simulation model and facilitate the development of electronic switching systems.
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Book chapters on the topic "Liquid crystal type sensors"

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Sun, Jian, Wanshu Zhang, Meng Wang, Lanying Zhang, and Huai Yang. "Bandwidth Tunable Cholesteric Liquid Crystal." In Liquid Crystal Sensors, 1–32. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-1.

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Wang, Ling, Karla G. Gutierrez-Cuevas, and Quan Li. "Photochromic Chiral Liquid Crystals for Light Sensing." In Liquid Crystal Sensors, 33–62. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-2.

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Cachelin, Pascal, and Cees W. M. Bastiaansen. "Chiral Nematic Liquid Crystalline Sensors Containing Responsive Dopants." In Liquid Crystal Sensors, 63–82. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-3.

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Moirangthem, Monali, and Albert P. H. J. Schenning. "Cholesteric Liquid Crystalline Polymer Networks as Optical Sensors." In Liquid Crystal Sensors, 83–102. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-4.

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Zafra, Juan Carlos Torres, Braulio García-Cámara, Carlos Marcos, Isabel Pérez Garcilópez, Virginia Urruchi, and José M. Sánchez-Pena. "All-Electrical Liquid Crystal Sensors." In Liquid Crystal Sensors, 103–22. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-5.

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Seo, Jooyeok, Myeonghun Song, Hwajeong Kim, and Youngkyoo Kim. "Liquid Crystal-Integrated-Organic Field-Effect Transistors for Ultrasensitive Sensors." In Liquid Crystal Sensors, 123–44. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-6.

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Yang, Kun-Lin. "Liquid Crystals in Microfluidic Devices for Sensing Applications." In Liquid Crystal Sensors, 145–58. Boca Raton, FL: CRC Press, [2017] | Series: Liquid crystals book series: CRC Press, 2017. http://dx.doi.org/10.1201/9781315120539-7.

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Hunter, Jacob T., and Nicholas L. Abbott. "Liquid Crystal-Based Chemical Sensors." In Liquid Crystals Beyond Displays, 485–504. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118259993.ch15.

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Freidzon, Ya S., and V. P. Shibaev. "Liquid-Crystal Polymers of the Cholesteric Type." In Liquid-Crystal Polymers, 251–302. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1103-2_7.

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Petkoska, Anka Trajkovska. "Polymer Choleristic Liquid Crystal Flakes as New Candidates for Display and Sensor Applications." In Nanotechnological Basis for Advanced Sensors, 315–22. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-0903-4_34.

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Conference papers on the topic "Liquid crystal type sensors"

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Chen, Xiaoxi, and Xu Liu. "A new type Shack-Hartmann wavefront sensor using liquid crystal display." In ICO20:Optical Devices and Instruments, edited by James C. Wyant and Xuejun Zhang. SPIE, 2006. http://dx.doi.org/10.1117/12.666834.

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Wu, Libo, and Ya Wang. "True Presence Detection via Passive Infrared Sensor Network Using Liquid Crystal Infrared Shutters." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2366.

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Abstract Recently, smart home applications are increasing fast, including but not limited to occupancy-dependent control of lighting, heating and cooling. Passive infrared (PIR) sensors play an important role in these applications to perceive the presence and/or the motion of human. However, PIR sensors are not able to detect stationary occupants while stationary presence takes up most time of the day. And thus, the resulted false negative detection leads to uncomfortable light/temperature swings, shortened equipment’s lifespan, and/or energy waste, etc. To address this issue, our group has developed Synchronized Low-Energy Electronically-chopped PIR (SLEEPIR) sensors that integrate an electronic liquid crystal (LC) infrared shutter with an off-the-shelf PIR sensor. In this work, the infrared shutter made of polymer dispersed liquid crystal (PDLC) sandwiched by two germanium windows is proposed to periodically chop the long-wave infrared signal received by the PIR sensor so that stationary human presence can still be detected due to the electronical shuttering. A sensor module is fabricated, consisting of a wireless microcontroller, a SLEEPIR sensor and a traditional PIR sensor, with a field of view of 103° × 103°. Then, a sensor network consists of two sensor modules is developed. Three types of experiments are conducted in this paper: individual action-based, continuous activity-based, and daily routine-based. The detection logic is made by using the threshold value classification method, where the threshold values are determined from the action-based dataset and applied to the other two datasets. The results show that for activity-based dataset, the average accuracy reached 98.96%. For daily routine-based dataset, the average accuracy is 99.57%.
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Shi, Jianjun, Liangqing Han, and Dayong Wang. "Liquid crystal optical sensors." In Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, edited by Jinfa Tang, Chao-Nan Xu, and Haizhang Li. SPIE, 2000. http://dx.doi.org/10.1117/12.401711.

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Chychlowski, M. S., E. Nowinowski-Kruszelnicki, and T. R. Woliński. "Liquid crystal orientation control in photonic liquid crystal fibers." In 21st International Conference on Optical Fibre Sensors (OFS21). SPIE, 2011. http://dx.doi.org/10.1117/12.886044.

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Algorri, J. F., P. C. Lallana, V. Urruchi, and J. M. Sanchez-Pena. "Modal liquid crystal temperature sensor." In 2014 IEEE Sensors. IEEE, 2014. http://dx.doi.org/10.1109/icsens.2014.6985416.

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Knauss, L. A., B. M. Frazier, H. M. Christen, S. D. Silliman, K. S. Harshavardhan, E. F. Fleet, F. C. Wellstood, M. Mahanpour, and A. Ghaemmaghami. "Detecting Power Shorts from Front and Backside of IC Packages Using Scanning SQUID Microscopy." In ISTFA 1999. ASM International, 1999. http://dx.doi.org/10.31399/asm.cp.istfa1999p0011.

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Abstract:
Abstract As process technologies of integrated circuits become more complex and the industry moves toward flipchip packaging, present tools and techniques are having increasing difficulty in meeting failure analysis needs. One of the most common failures in these types of ICs and packages is power shorts, both during fabrication and in the field. Many techniques such as Emission Microscopy and Liquid Crystal are either not able to locate power shorts or are inhibited in their effectiveness by multiple layers of metal and flip-chip type packaging. A scanning SQUID microscope can overcome some of these difficulties. A SQUID (Superconducting Quantum Interference Device) is a very sensitive magnetic sensor that can image magnetic fields generated by magnetic materials or currents (such as those in an integrated circuit). The current density distribution in the sample can then be calculated from the magnetic field image, and resolutions approaching 5 times the near field limit can be obtained. We present here the application of a SQUID microscope to physical failure analysis and compare it with other techniques to detect shorted current paths in flip-chip mounted ICs and packages.
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Wolinski, Tomasz R., Piotr Lesiak, Katarzyna Slusarz, Slawomir Ertman, Aleksandra Czapla, Andrzej W. Domanski, Edward Nowinowski-Kruszelnicki, Roman Dabrowski, and Jan Wojcik. "Polarization Effects in Photonic Liquid Crystal Fibers." In Optical Fiber Sensors. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ofs.2006.the58.

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Zebrowski, Thomas, Sabine Essig, and Kurt Busch. "Simulation of Liquid Crystal Infiltrated Photonic Crystal Fibers Using the Fourier Modal Method." In Optical Sensors. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/sensors.2010.jtha2.

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Lindquist, R. G., A. Abu-Abed, and Woo-Hyuck Choi. "Liquid Crystal Sensors with Capacitive Transduction." In 2006 5th IEEE Conference on Sensors. IEEE, 2006. http://dx.doi.org/10.1109/icsens.2007.355878.

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Zharkova, G. M., A. P. Petrov, V. N. Kovrizhina, and E. F. Pen. "Optical polymer liquid crystal pressure sensors." In PROCEEDINGS OF THE XXV CONFERENCE ON HIGH-ENERGY PROCESSES IN CONDENSED MATTER (HEPCM 2017): Dedicated to the 60th anniversary of the Khristianovich Institute of Theoretical and Applied Mechanics SB RAS. Author(s), 2017. http://dx.doi.org/10.1063/1.5007459.

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Reports on the topic "Liquid crystal type sensors"

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Crandall, K., D. Shenoy, S. Gray, J. Naciri, and R. Shashidhar. Pyrolectric Liquid Crystal Materials for Uncooled IR Sensors. Fort Belvoir, VA: Defense Technical Information Center, July 1999. http://dx.doi.org/10.21236/ada389595.

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