Relevant bibliographies by topics / Fluoride Sensors

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Fluoride Sensors'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

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Journal articles on the topic "Fluoride Sensors"

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Kropachev, Andrei N., Sergey V. Podrezov, Alexander V. Aleksakhin, Andrey A. Gudilin, Olga A. Kondratyeva, and Lyudmila N. Korshunova. "Thermodynamic Studies and Optimization of the Method for Obtaining Neodymium Fluoride for the Production of Magnetic Sensors’ Sensitive Elements." Sensors 21, no. 24 (December 15, 2021): 8361. http://dx.doi.org/10.3390/s21248361.

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Rare earth metals (REM) with magnetic properties find application in the recently developed high-tech industries. Sensor magnetic systems based on neodymium are increasingly in demand in modern engineering and geological surveys due to their favorable combination of properties of magnetic materials based on rare earth metals. One of the problems is to obtain high-quality materials for the production of such magnetic sensors. It should be noted that the high activity of REM does not allow obtaining master alloys and REM-based alloys from metallic materials; it is advisable to use halide compounds. This work discusses a method for producing neodymium fluoride from its oxide. REM fluorides can be obtained by fluorinating the oxides of these metals. Various fluorine-containing compounds or elemental fluorine are usually used as fluorinating reagents, which have their own advantages and disadvantages. The thermodynamic and technological analysis of neodymium fluoride production processes has shown the most acceptable fluorinating agent is ammonium hydrofluoride, which was used in this work. In order to increase the productivity and degree of chemical transformation, it was proposed to perform heating stepwise; i.e., at the initial stage, heat at a speed of 3 degrees per minute, after which the heating speed was reduced to 2 degrees per minute, and finally the speed was reduced to 1 degree per minute. Due to proposed heating mode, the same productivity and yield of chemical transformation were achieved, with an increased efficiency up to 30%, which can significantly reduce the cost of production. The obtained product is used in the production of neodymium-based alloys by metallothermic reduction of a mixture of fluorides. The sensor material obtained in this way is characterized by a low (less than 0.05%) oxygen content.
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Ma, Lei, Shreyes N. Melkote, John B. Morehouse, James B. Castle, James W. Fonda, and Melissa A. Johnson. "Design of thin-film polyvinylidene fluoride sensor rosettes for isolation of various strain components." Journal of Intelligent Material Systems and Structures 23, no. 10 (May 6, 2012): 1119–30. http://dx.doi.org/10.1177/1045389x12443597.

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Thin-film polyvinylidene fluoride piezoelectric sensors have long been recognized as a promising alternative to traditional metal foil strain gauges in applications where only dynamic or quasistatic signals are of interest. Compared to metal foil strain gauges, polyvinylidene fluoride sensors feature high sensitivity, high dynamic range, and broad frequency bandwidth. However, transverse sensitivity of the polyvinylidene fluoride sensor is higher than that of a metal foil strain gauge, making it more difficult to isolate a particular strain component or a deformation mode when the host structure is under complex loading. In addition, polyvinylidene fluoride films are sensitive to changes in ambient temperature due to the pyroelectric effect. In this article, three temperature-compensated polyvinylidene fluoride sensor rosette designs are proposed for isolating specific strain component(s) and deformation mode(s) of interest. First-principles based models are derived to relate the polyvinylidene fluoride sensor rosette output to the actual elastic strain component of interest. Experimental validation is conducted to verify the proposed models and to compare the performance of the polyvinylidene fluoride sensor rosettes with their metal foil strain gauge counterparts.
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Schultz, J. S. "Chemical Sensors and Biosensors for Fluoride: Current Status and Developing Technologies." Advances in Dental Research 8, no. 1 (June 1994): 100–104. http://dx.doi.org/10.1177/08959374940080010101.

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Portable sensors for bioanalytes are becoming of increasing interest, because their development will permit analyses of biological samples at the point of sampling, i.e., at the time when an individual is being examined by a health professional. In this paper, the design requirements for a fluoride sensor are outlined. Currently, commercially available fluoride sensors, ion-selective electrodes, do provide the capability to measure fluoride content in samples directly. However, the sensitivity of these devices is lower than the normal content of fluoride in plasma, and thus, samples must be concentrated before measurement. Recent progress in improving the sensitivity of chemical sensors for fluoride shows sensitivities up to 0.1 μmol/L, which is within the range of interest. In addition, the use of biological systems for developing sensors (biosensors) is expanding rapidly, because of the potential of achieving high selectivity and sensitivity through the use of the amplification power of enzymes. However, relatively few enzyme systems have been discovered that are affected by fluoride-thus the need for expanded research to find appropriate enzymes for this purpose. The characteristics of some enzymes, such as adenylate cyclase, that could be used in the development of a fluoride biosensor are discussed.
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Ma, Yuan, Quanbing Mou, Peng Yan, Zhenglin Yang, Ying Xiong, Deyue Yan, Chuan Zhang, Xinyuan Zhu, and Yi Lu. "A highly sensitive and selective fluoride sensor based on a riboswitch-regulated transcription coupled with CRISPR-Cas13a tandem reaction." Chemical Science 12, no. 35 (2021): 11740–47. http://dx.doi.org/10.1039/d1sc03508h.

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A fluoride sensor based on riboswitch-regulated transcription coupled with Cas13a sensor can detect fluoride in water with a portable fluorometer. This sensor expands nuclei acid sensors to an anion, with high sensitivity and selectivity against other common anions.
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Sun, Ying, Rui Cao, Zhan Lu, Xin Nie, Zhaokai Li, Yonghua Yu, Hongping Tian, Xiangqun Qian, and Jianping Wang. "Design and Testing of an Impact Sensor Using Two Crossed Polyvinylidene Fluoride (PVDF) Films." Transactions of the ASABE 62, no. 5 (2019): 1195–205. http://dx.doi.org/10.13031/trans.13440.

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Abstract. Impact sensors are widely used to detect grain losses in harvesters. Using polyvinylidene fluoride (PVDF) films as sensing elements is a promising way to improve sensor performance due to their high sensitivity, stability, and flexibility. However, the overlap of collision signals significantly reduces the accuracy of a sensor. To solve this problem, a novel impact sensor with two crossed PVDF films was designed and investigated. This sensor has two orthogonal layers of sensing elements that both respond to impacts, which creates positioning information for the impacts. Because of the sensor’s structure, a signal processing method was designed based on multisensor fusion theory. Tests were performed to verify the performance of the proposed impact sensor. The average signal-to-noise ratios (SNRs) for impacted PVDF films were 34.79 and 20.23 dB, respectively, for the upper and lower layers, while the average signal-to-clutter ratios (SCRs) for nonimpacted films were 21.90 and 10.05 dB, respectively. The sensor also has an extremely high detection efficiency of at least 1528 collisions per second and can identify particles that impact at the same time. Keywords: Grain loss detection, Impact sensors, Multisensor fusion, Particle impact tests, PVDF films.
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Chanmungkalakul, Supphachok, Vuthichai Ervithayasuporn, Sasikarn Hanprasit, Manlika Masik, Nicha Prigyai, and Suda Kiatkamjornwong. "Silsesquioxane cages as fluoride sensors." Chemical Communications 53, no. 89 (2017): 12108–11. http://dx.doi.org/10.1039/c7cc06647c.

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Cho, Eun Jin, Byung Ju Ryu, Young Ju Lee, and Kye Chun Nam. "Visible Colorimetric Fluoride Ion Sensors." Organic Letters 7, no. 13 (June 2005): 2607–9. http://dx.doi.org/10.1021/ol0507470.

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FREEMANTLE, MICHAEL. "Fluorescent sensors detect fluoride ions." Chemical & Engineering News 76, no. 28 (July 13, 1998): 15–16. http://dx.doi.org/10.1021/cen-v076n028.p015a.

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Lenormand, Hugo, Jean-Philippe Goddard, and Louis Fensterbank. "Spirosilane Derivatives as Fluoride Sensors." Organic Letters 15, no. 4 (January 29, 2013): 748–51. http://dx.doi.org/10.1021/ol3033048.

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Ma, Chao Zhe, Jin Song Du, and Yi Yang Liu. "Research on PVDF Micro-Force Sensor." Applied Mechanics and Materials 599-601 (August 2014): 1135–38. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.1135.

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At present, sub-micro-Newton (sub-μN) micro-force in micro-assembly and micro-manipulation is not able to be measured reliably. The piezoelectric micro-force sensors offer a lot of advantages for MEMS applications such as low power dissipation, high sensitivity, and easily integrated with piezoelectric micro-actuators. In spite of many advantages above, the research efforts are relatively limited compared to piezoresistive micro-force sensors. In this paper, Sensitive component is polyvinylidene fluoride (PVDF) and the research object is micro-force sensor based on PVDF film. Moreover, the model of micro-force and sensor’s output voltage is built up, signal processing circuit is designed, and a novel calibration method of micro-force sensor is designed to reliably measure force in the range of sub-μN. The experimental results show the PVDF sensor is designed in this paper with sub-μN resolution.
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Dissertations / Theses on the topic "Fluoride Sensors"

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Kotian, Kunal. "Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1357254821.

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do, Nascimento Oliveira Jose Emidio. "Deformation and damage analysis of composite beams equipped with polyvinylidene fluoride film sensors." Thesis, Cape Peninsula University of Technology, 2008. http://hdl.handle.net/20.500.11838/1284.

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In many engineering applications, it is desirable to know the behaviour of structures and systems under loading conditions. One reason is to help optimize the design and prevent damage and failure which might occur during in service and operation. Damage represents a serious problem which can cause catastrophic failure of structures, machines and systems. Therefore for safe operation, efficient and reliable methods for inspection and monitoring of damage are required. Different methods for health monitoring of structures such as non destructive testing (NDT) and strain gauges are widely used. These methods have proven to be efficient in terms of resolution and response. However, some disadvantages associated with them include the vicinity of the area under inspection which must be well known, equipment to acquire the necessary information is expensive and in many cases high skills are required for operation. On the other hand, advances in materials science and MEMS systems has promoted the use of new materials with piezoelectric properties. This include mainly polymeric and ceramic materials which after processed can be used for structural health monitoring. These materials offer a number of advantages such as lightweight, sensitivity, toughness, durability, and low cost. The present research work investigates the feasibility of using a polymeric material, Polyvinylidene Fluoride (PVDF) as a sensor for deformation and defect detection in structures. The sensors are embedded in composite cantilevered type beams to detect defects at distinct locations along the beam’s length. The defect detection method proposed is based on experimental tests and Finite Element simulations. Experimental tests on defect free and beams with manufactured internal flaws were conducted. Numerical (FEM) simulations of defect free and flawed beam models containing sections of reduced elastic modulus to represent the damage were conducted using ANSYS software. The experimental tests have been used for the validation of the numerical solution. Results have shown that the defect location changes the stiffness and indeed the frequency of vibration. For flaws near the fixed end of the beams, lower frequencies are obtained as compared to flaws away from the fixed end. PVDF sensors were used to acquire the natural frequencies of the beams for the first mode of vibration. Good agreement was verified between experimental and numerical simulation results. The work has demonstrated that PVDF film sensors can be used as possible candidates for defect detection. The analysis of the behaviour embedded PVDF sensors near the fixed end of cantilever beams, represents an initial and important step towards the application of measuring static and dynamic behaviour of structures as part of a health monitoring process.
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Do, Nascimento Oliveira Jose Emidio. "Deformation and damage analysis of composite beams equipped with polyvinylidene fluoride film sensors /." [S.l. : s.n.], 2008. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1001&context=td_cput.

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Anderson, Gregory Lee. "The development of poly(vinylidene fluoride) piezoelectric sensors for measuring peel stresses in adhesive joints." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/39881.

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Although bond-normal stresses have been shown to be responsible for the failure of most laboratory adhesive joint geometries, the measurement of these stresses has been accomplished only through the use of very sophisticated optical techniques. In order to develop a more versatile measurement technique, poly(vinylidene fluoride) film was used to develop piezoelectric stress sensors. The sensitivities of the film to normal stresses in the three principal material directions of the orthotropic film were accurately measured using a charge amplifier and a storage oscilloscope. These measured sensitivities comprised the calibration constants of the film. In order to reduce the detrimental effect on bond strength caused by embedding the low surface energy film into adhesive bondlines, surface treatment methods were investigated using contact angle studies, XPS analysis and 1800 peel and tapered double cantilever beam adhesion specimens. An acid etch using a mixture of acetic, phosphoric and nitric acids was found to greatly improve the bond strengths to an epoxy adhesive without reducing the piezoelectric activity of the film. The bond-normal stresses in both the elastomeric butt joint and the single lap shear joint were measured using the developed stress sensors. Comparison of the measured stresses with calculated values obtained from closed-form analytical solutions and finite element analysis for the stresses was excellent. The piezoelectric sensors do have several important limitations. The piezoelectric activity of the film is lost at temperatures above 100°C (210°F). Also, the sensors are only sensitive to dynamic loads. Nonetheless, the sensors provide an accurate means of measuring peel stresses in many adhesive joints of practical interest.
Ph. D.
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SARINK, NIEKE. "Characterization and Manufacturing of Textile Pressure Sensors based on Piezoelectric Fibres." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18054.

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The main purpose of this thesis was to investigate and characterize the use of piezoelectric yarn for use in textile (fingertip) pressure sensors in glove applications. Such applications could include healthcare, security and safety, game applications or intelligent control. Piezoelectric materials generate a voltage when pressed or squeezed. Poly(vinylidene fluoride) (PVDF) is a polymorphic material with piezoelectric properties. PVDF yarns were integrated into block sensors. These blocks consist of thermoplastic material glued to a knitted supporting fabric. The electrical signal given off by the PVDF yarn was measured with the help of an oscilloscope. The block sensor generated a distinguishable signal under a dynamic compression of 0.003 N, indicating that the structure is sensitive enough compared to the average male fingertip sensitivity threshold (0.0054N).
Program: Master programme in Textile Engineering
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Sattenapally, Narsimha. "SYNTHESIS AND DEVELOPMENT OF SILICON ANALOG OF FLUORESCEIN FLUOROPHORES AND ESTERIFICATION CATALYSTS." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/dissertations/588.

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The synthesis and development of new materials and the improvement of the existing materials are a continuous quest for scientists. There is a constant need for new materials that have more advantages over the existing ones. The research to develop new materials can be appreciated in high magnitude, as the new materials improve the livelihood. In this dissertation, we are presenting our progress in developing new materials, such as fluorescence fluorophores as probes, and esterification catalysts. In the first part of the dissertation, the synthesis and characterization of a novel silicon analog of fluorescein (silyl fluorescein) was studied in detail. The photo-physical properties and toxicity studies of these fluorophores are also discussed. Compared to fluorescein, silyl fluorescein displayed a 90 nm longer wavelength in its absorption and emission. Silyl fluorescein showed good solubility in water and organic solvents, and has a considerable fluorescence quantum yield compared to fluorescein. Silyl fluorescein was found to be moderately toxic under light and non-toxic in dark, where as fluorescein toxicity was found to be greater than silyl fluorescein both in the dark and under light. Two probes from our novel silyl fluorescein fluorophore were developed and studied. SIF HySOx is probe for hypochlorous acid (HOCl), which is a reactive oxygen species (ROS) found in cells that are stressed due to various diseases. The HOCl probe was synthesized and its photo-physical properties were studied. It was found to be selective and sensitive only to HOCl. A fluoride probe (DTBDMS SIF P) was also developed from silyl fluorescein. Its synthesis and photo-physical properties were also studied. The probe displayed excellent selectivity and sensitivity to fluoride (TBAF) in the presence of other halides and bases. Future directions on novel fluorophore are briefly mentioned. Second part of the dissertation is focused on the screening of two organic esterification catalysts which were synthesized by Dr. Liu and Dr. Wong. The catalysts which are synthesized from pyridine and dinitrobenzene moieties were screened with several carboxylic acids and alcohols. Catalyst 8-4 was shown to be moderately active in the esterification of carboxylic acids and alcohols. It has no selectivity in the esterification of primary, secondary, tertiary alcohols, and the carboxylic acids that are attached to those carbons. Catalyst 9-1 however, was more efficient in the esterification of carboxylic acids and alcohols. Catalyst 9-1 displayed selectivity in the esterification of primary, over secondary, over tertiary alcohols, and the carboxylic acids that are attached to those carbons. Catalyst 9-1 gave up to 95% isolated yields.
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Bauer, Philippe. "Caractérisation et modélisation de senseurs infrarouges pyroélectriques monolithiques utilisés en détection d'obstacles." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0140.

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En detection d'obstacles, dans le cadre de l'application automobile, la voie infrarouge passive fondee sur l'imagerie thermique (bande 8-14m), est apparue, a long terme, la solution ideale. Les objectifs de faible cout de fabrication ont conduit a la realisation d'une matrice de 32x32 detecteurs pyroelectriques utilisant le polyvinylidene trifluoroethylene (pvdf-trfe), depose sur un circuit de lecture de type cmos selon les techniques habituelles du depot des resines de la microelectronique. Ce memoire presente un travail de fond sur la comprehension de la detection pyroelectrique par le pvdf-trfe, a temperature ambiante. Les progres des performances des senseurs proviennent essentiellement de l'etude du comportement pyroelectrique du materiau dans la structure technologique, des modelisations thermo-electriques (1d et 3d) et des caracterisations electro-optiques des senseurs integres. Les parametres cruciaux du modele de detection ont ete determines et les differentes sources de bruit des dispositifs analysees. La reponse mesuree est quasiment optimale et valide notre modele. Actuellement, la sensibilite du capteur est essentiellement limitee par le bruit de l'electronique plan focal: la mise en uvre du senseur est determinante. Le resume des performances que constitue nedt=0. 4k a f/l, est encore actuellement majore par un exces de bruit de lecture. L'optimisation de son fonctionnement laisse raisonnablement esperer une valeur de l'ordre de 0. 2k. Pour la detection sur route, nous proposons une structure adaptee a la geometrie de prise de vue sur route par une optique faible cout. Nous validons par des simulations, une architecture analogique dans le plan focal, permettant de reduire le debit d'informations issu du capteur
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Shay, Nikolas W. "Electrochemical Sensor Development for Fluoride Molten Salt Redox Control." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149265579014054.

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PORTELLA, KLEBER F. "Projeto, montagem e caracterizacao de um sensor de fluor com eletrolito solido ceramico de PbFsub2." reponame:Repositório Institucional do IPEN, 1997. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10645.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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Dargahi, Javad. "The applications of polyvinylidene fluoride as a robotic tactile sensor." Thesis, Glasgow Caledonian University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.688235.

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Book chapters on the topic "Fluoride Sensors"

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Alexander, Peter W. "Enzyme-Linked Immunoassay with a Fluoride Ion Selective Electrode." In Electrochemical Sensors in Immunological Analysis, 203–10. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4899-1974-8_15.

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Mazé, G., V. Cardin, F. Chiquet, and M. Poulain. "Fluoride Glass Fiber-Optic Sensors: Realizations and Prospects." In Springer Proceedings in Physics, 20–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-75088-5_5.

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Fontes, Otacilio, Fábio M. Soares, and Roberto Limão. "Estimation of Aluminium Fluoride Concentration in Aluminium Reduction Cells through a Soft Sensors Approach." In Intelligent Data Engineering and Automated Learning - IDEAL 2012, 303–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32639-4_37.

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Pandey, Shivani, Satanand Mishra, Vijay Kumar Dwivedi, Tanmay Sardar, Archana Singh, and Hari Narayan Bhargav. "Advanced Sensor for Arsenic and Fluoride Detection." In Lecture Notes in Civil Engineering, 595–611. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9151-6_48.

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Sardar, Tanmay, Shivani Pandey, Satanand Mishra, and H. L. Tiwari. "Design of Smart Geo-Sensor for Detection of Fluoride in Water Resources." In Lecture Notes in Civil Engineering, 451–61. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9151-6_37.

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Aniley, Almaw Ayele, S. K. Naveen Kumar, and A. Akshaya Kumar. "Dual Probe Heat Pulse (DPHP) Method Soil Moisture Sensor Using Advanced Materials-Based Thermistor and Fluorine Doped Tin Oxide (FTO) Thin Film Electric Heater." In Nanostructured Smart Materials, 233–51. First edition.: Apple Academic Press, 2021. http://dx.doi.org/10.1201/9781003130468-16.

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Hernan Otal, Eugenio, Manuela Leticia Kim, and Mutsumi Kimura. "Fluoride Detection and Quantification, an Overview from Traditional to Innovative Material-Based Methods." In Fluoride [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102879.

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Fluorine is the 13th most abundant element on Earth, and fluoride is part of our everyday lives, present in our drinking water, beauty products, and naturally present in food and beverages. It is a key element to increase the resistance of the dental enamel to the acidic bacteria attack and prevent dental decay. However, the ingestion of this anion for an extended period of time and in concentrations over the recommended limits can produce mild to severe health issues, called fluorosis, that can produce incorrect dental enamel formation, reduce the functionality of joints and even affect the bone structure. To avoid these terrible effects, it is necessary to control the fluoride levels in drinkable water, particularly in communities without access to safe water networks. To achieve this goal, the first step is to identify safe water sources and provision portable and reliable sensors to these communities. A major step towards safe water accessibility would be the implementation of these sensors by the proper use of new materials and technologies. Here we present an overview of the traditional quantification methodologies and the new ones for fluoride detection and quantification, and the future trends on portable devices for user-friendly on-point measurements.
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Kaur, Navneet. "Solid-state sensors for fluoride." In Green Sustainable Process for Chemical and Environmental Engineering and Science, 95–122. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-819720-2.00006-0.

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Sahay, Neeta, and Subrata Chattopadhyay. "Characteristic Behavior of PVDF-Compliant Structure as an End Effector Using Creo Element/Pro Release 5.0." In Advances in Systems Analysis, Software Engineering, and High Performance Computing, 203–12. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2584-5.ch012.

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The tremendous area of application of microprocessors and microcontrollers has exhausted the demand for polymers as sensors among the fastest growing technologies of the $18 billion sensor market worldwide. This chapter presents the study of characteristic behavior of a compliance structure made of PVDF (Poly Vinylidene Fluoride) material which is acting as an actuator and sensor, too. The inverse piezoelectric nature of PVDF has been used to produce the required amount of force by applying the voltage at a specific point at the base of the structure which is generating the opening and closing of the end effector. The displacement of the tip of the end effector can be sensed by generated voltage of piezoelectric effect of PVDF.
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Guan, Hongjian, Ruilin Yang, Yi Tao, Huilin Tai, Yuanjie Su, Yang Wang, and Weizhi Li. "Flexible Humidity Sensor Based on Polyvinylidene Fluoride." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde221203.

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Polyvinylidene fluoride (PVDF) is considered to be one of the most promising candidates for next-generation wearable sensors; however, the sensing ability of PVDF is worth expanding beyond its ferroelectricity. In this work, PVDF is used as matrix material for humidity detection by adding two other ingredients: lithium chloride (LiCl) and polyvinyl alcohol (PVA), optimal concentrations of LiCl and PVA are found by systematic investigation of the impact of the two inclusions on humidity sensing ability of the composites.
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Conference papers on the topic "Fluoride Sensors"

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Nakamura, K., Y. Sasaki, S. Kachi, and T. Shibata. "Development of Fluoride Glass Tape Guide." In Optical Fiber Sensors. Washington, D.C.: OSA, 1986. http://dx.doi.org/10.1364/ofs.1986.105.

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Gao, Zhaolin, Matthew J. Danley, Jack T. Kloster, Victor K. Lai, and Ping Zhao. "Characterization of Nanoporous Polyvinylidene Fluoride (PVDF) Sensors Under Tensile Loading." In ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/smasis2021-67462.

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Abstract A Polyvinylidene Fluoride (PVDF) sensor with integrating nanoporous structures was developed and fabricated to improve its piezoelectric effect. The sensor samples with different porosities ranging from 3.3% to 42.0% were made. The porosity effect on the piezoelectric coefficient d31 of the sensors was studied under tensile loading. The results showed that the d31 value increased from ∼21.3 pC/N to ∼51.3 pC/N as the porosity increased from 3.3% to 23.7%. With a further increase in porosity, the d31 value had a considerable declining trend. The optimal porosity value was determined to be 23.7% as the sensor exhibited the strongest piezoelectric effect at this point. Meanwhile, a cyclic load was applied to the sensors to investigate their sensing effect and the results indicated that the sensors can properly detect a dynamic load ranging from 0 to 10 N. It was also found that the voltage output produced from the sensors significantly changed with the porosity and the sensor with 23.7% porosity showed the best sensing performance, which was in an agreement with the piezoelectric coefficient d31.
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Chevalier, Paul, Arman Amirzhan, Jeremy Rowlette, Ted Stinson, Michael Pushkarsky, Timothy Day, Federico Capasso, and Henry O. Everitt. "Widely tunable quantum cascade laser-pumped methyl fluoride terahertz laser." In Optical Sensors. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/sensors.2021.sf1b.3.

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de Rochemont, Pierre, Allen Bonde, Jr., Anthony Boniface, Philip Levin, and Major Daniel Rapp. "Summary of Remotely Sensing Molecular Spectra with Fluoride Fiber." In Optical Fiber Sensors. Washington, D.C.: OSA, 1988. http://dx.doi.org/10.1364/ofs.1988.faa6.

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Sengupta, Debarun, Ajay Giri Prakash Kottapalli, Jianmin Miao, and Chee Yee Kwok. "Electrospun polyvinylidene fluoride nanofiber mats for self-powered sensors." In 2017 IEEE SENSORS. IEEE, 2017. http://dx.doi.org/10.1109/icsens.2017.8233936.

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Mordon, Serge, Elizabeth Zoude, and Jean Marc Brunetaud. "Non-Contact Temperature Measurement with a Zirconium Fluoride Glass Fiber." In Optical Fiber Sensors. Washington, D.C.: OSA, 1988. http://dx.doi.org/10.1364/ofs.1988.fff3.

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Headings, Leon M., Kunal Kotian, and Marcelo J. Dapino. "Speed of Sound Measurement in Solids Using Polyvinylidene Fluoride (PVDF) Sensors." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3206.

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Piezoelectric film sensors such as polyvinylidene flouride (PVDF) generate an electrical voltage in response to an applied mechanical stress with a remarkably high sensitivity. They provide very fast response times and do not require extensive signal conditioning. This paper presents a straightforward method of measuring the speed of sound in solid materials and structures using commercial PVDF sensors. PVDF sensors are most commonly used to measure stresses applied in the sensors’ thickness direction. However, this requires that the sensors be located in the load path, which may result in damage to the sensor or affect the response of the system. In this paper, two PVDF sensors are bonded to the side of a structure and a small impact is applied to one end. The sensors are used to measure the time for the impact-induced plane stress wave to travel between the sensors. The observed speed of the propagating stress wave is shown to be in good agreement with the theoretical speed of sound for the material and finite element calculations. In addition, the finite element simulations confirm the validity of the plane wave assumption for non-ideal and non-uniform impact inputs.
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Saggese, Steven J., Mahmoud R. Shahriari, and George H. Sigel, Jr. "Fluoride Fibers For Remote Chemical Sensing." In 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, edited by Solomon Musikant. SPIE, 1988. http://dx.doi.org/10.1117/12.945858.

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Park, Chul H., Hyun C. Park, Kimoon Lee, and Hyun K. So. "Optimal Electrode Shape Design for Multi-Mode Sensors." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81981.

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This paper presents optimal electrode shape design methods for the multi-mode sensors that could detect the structural multiple modes. The structure used for this study is an isotropic cantilever beam type with a PVDF (polyvinylidene fluoride) which is bonded onto the structure as a sensor. The shape optimization problem is solved by using Genetic Algorithm (GA) and Super-position method. The performance of analytical optimal shape sensor is validated by experiment. The results show that the obtained electrode shape sensors have good performance to detect the multiple vibration modes simultaneously.
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Friebele, E. J., M. A. Putnam, H. J. Patrick, A. D. Kersey, A. S. Greenblatt, G. P. Ruthven, M. H. Krim, and K. S. Gottschalck. "Ultrahigh Sensitivity Strain and Temperature Sensing With Silica and Fluoride Fiber Cavity Etalons." In Optical Fiber Sensors. Washington, D.C.: OSA, 1997. http://dx.doi.org/10.1364/ofs.1997.othd4.

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Reports on the topic "Fluoride Sensors"

1

Stricker, Elizabeth, and Nathaniel Hoyt. Electroanalytical Sensors for Liquid Fueled Fluoride Molten Salt Reactor. Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1841683.

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