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Relevant bibliographies by topics / Electroactive phase

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Academic literature on the topic 'Electroactive phase'

Author: Grafiati

Published: 28 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Electroactive phase"

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Chinya, Ipsita, Abhishek Sasmal, Avijit Pal, and Shrabanee Sen. "Flexible piezoelectric energy harvesters using different architectures of ferrite based nanocomposites." CrystEngComm 21, no. 22 (2019): 3478–88. http://dx.doi.org/10.1039/c9ce00406h.

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Yuan, Du, Zibiao Li, Warintorn Thitsartarn, Xiaoshan Fan, Jiaotong Sun, Hui Li, and Chaobin He. "β phase PVDF-hfp induced by mesoporous SiO2 nanorods: synthesis and formation mechanism." Journal of Materials Chemistry C 3, no. 15 (2015): 3708–13. http://dx.doi.org/10.1039/c5tc00005j.

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Thakur, Pradip, Arpan Kool, Biswajoy Bagchi, Nur Amin Hoque, Sukhen Das, and Papiya Nandy. "The role of cerium(iii)/yttrium(iii) nitrate hexahydrate salts on electroactive β phase nucleation and dielectric properties of poly(vinylidene fluoride) thin films." RSC Advances 5, no. 36 (2015): 28487–96. http://dx.doi.org/10.1039/c5ra03524d.

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Zherebov, A., A. Lachinov, V. Kornilov, and M. Zolotukhin. "Metal phase in electroactive polymer induced by uniaxial pressure." Synthetic Metals 84, no. 1-3 (January 1997): 735–36. http://dx.doi.org/10.1016/s0379-6779(96)04122-7.

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Zherebov, A., A. Lachinov, and V. Kornilov. "Metal phase in electroactive polymer induced by traps ionization." Synthetic Metals 84, no. 1-3 (January 1997): 917–20. http://dx.doi.org/10.1016/s0379-6779(96)04896-5.

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Li, Longchao, Juan Ge, Ling Wang, Baolin Guo, and Peter X. Ma. "Electroactive nanofibrous biomimetic scaffolds by thermally induced phase separation." Journal of Materials Chemistry B 2, no. 36 (July 21, 2014): 6119. http://dx.doi.org/10.1039/c4tb00493k.

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Kar, Epsita, Navonil Bose, Sukhen Das, Nillohit Mukherjee, and Sampad Mukherjee. "Enhancement of electroactive β phase crystallization and dielectric constant of PVDF by incorporating GeO2 and SiO2 nanoparticles." Physical Chemistry Chemical Physics 17, no. 35 (2015): 22784–98. http://dx.doi.org/10.1039/c5cp03975d.

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Thakur, Pradip, Arpan Kool, Biswajoy Bagchi, Nur Amin Hoque, Sukhen Das, and Papiya Nandy. "Improvement of electroactive β phase nucleation and dielectric properties of WO3·H2O nanoparticle loaded poly(vinylidene fluoride) thin films." RSC Advances 5, no. 77 (2015): 62819–27. http://dx.doi.org/10.1039/c5ra11407a.

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Lee, Ji Eun, and Siu Ning Leung. "Multi-stage crystallization mechanism of electroactive phase polyvinylidene fluoride induced by thermal and supercritical carbon dioxide processing." CrystEngComm 20, no. 29 (2018): 4080–89. http://dx.doi.org/10.1039/c8ce00531a.

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Chandran, Akash M., S. Varun, and Prasanna Kumar S. Mural. "Development of self-poled PVDF/MWNT flexible nanocomposites with a boosted electroactive β-phase." New Journal of Chemistry 44, no. 34 (2020): 14578–91. http://dx.doi.org/10.1039/d0nj02003f.

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In the present study, we report a simple fabrication method for poly(vinylidene fluoride) PVDF/MWCNT flexible nanocomposite films with a boosted electroactive phase that enhanced the dielectric and piezoelectric properties.

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Dissertations / Theses on the topic "Electroactive phase"

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Chen, PoYun. "Role of Ionic Liquid in Electroactive Polymer Electrolyte Membrane for Energy Harvesting and Storage." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1590688110146547.

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Smejkalová, Tereza. "Energeticky disperzní rentgenová spektroskopie dopovaných vláken PVDF." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442435.

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Tato diplomová práce zkoumá flexibilní materiál k produkci elektřiny založený na piezoelektrickém polymeru Polyvinylidenfluorid (PVDF). Inkorporací piezoaktivní keramiky lze vlastnosti piezoelektrického polymeru PVDF významně zlepšit a převést na užitečnou elektrickou energii. PVDF byl vytvořen elektrostatickým zvlákňováním do vláken o tloušťce 1,5-0,3 µm a poté studován různými analytickými metodami. Tato práce nabízí popis elektrostatického zvlákňování, přípravu vzorků a teoretický úvod do analytických metod, kterým byly vzorky podrobeny. Morfologie a distribuce nanostrukturované keramiky do polymerní matrice PVDF byla pozorována použitím skenovací elektronové mikroskopie (SEM) a energiově disperzní spektroskopie (EDX). Pro tvorbu fáze a podrobné fázové složení byly vzorky charakterizovány infračervenou spektroskopií s Fourierovou transformací (FTIR). Práce také obsahuje analýzu s použitím Ramanovy spektroskopie, metody používané k identifikaci a porovnání chemických sloučenin. Elektrické vlastnosti byly studovány dielektrickou spektroskopií a je poskytnuta korelace se složením. Jednotlivé komponenty dotovaných vláken jsou charakterizovány a vyhodnocovány v souvislosti s jejich budoucím využitím v senzorech.

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Nicolas, Maël. "Nouveaux recepteurs electroactifs substitues par des acides ou esters boroniques. Reconnaissance anionique et moleculaire en phases homogene et heterogene." Rennes 1, 2000. http://www.theses.fr/2000REN10086.

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La fonctionnalisation de molecules electroactives par des acides ou esters boroniques a ete realisee en vue de creer de nouveaux systemes de reconnaissance electrochimique moleculaire ou anionique. L'utilisation de tels groupements presente un interet double : d'une part, le caractere acide dur de lewis de l'atome de bore lui confere une affinite particuliere vis-a-vis de certaines bases dures comme les ions fluorure ; d'autre part, les groupements hydroxyles de l'acide boronique permettent egalement la complexation de certaines structures polyhydroxylees telles que les sucres. Tout d'abord, l'electropolymerisation de composes aromatiques (thiophene, pyrrole, aniline) prefonctionnalises par un acide ou un ester boronique a abouti a la formation de films de polymeres electroactifs en milieux aqueux et organique. En phase immobilisee, l'interaction entre le bore et le substrat etudie va induire, dans certains cas, une modification du signal electrochimique causee par la perturbation des proprietes electroniques ou conformationnelles du polymere. L'etude electrochimique de ces polymeres conducteurs electroniques (en particulier le polypyrrole substitue en position 3 par un ester boronique) a finalement rendu compte d'une bonne selectivite vis-a-vis des ions fluorure et, dans une moindre mesure, des ions chlorure. L'etude en presence de sucres n'a pu etre approfondie a cause de la faible electroactivite des depots electroformes dans l'eau. La synthese d'autres recepteurs derives des triphenylamines dans lesquels la delocalisation electronique s'etend du centre redox a l'atome de bore a ensuite ete decrite. Des modifications voltamperometriques remarquables sont observees avec ces composes en solution suite a l'ajout de f alors qu'aucun effet n'est remarque avec cl ou br. Enfin, les essais realises avec le complexe ferreux de l'acide 4-2,2-bipyridine boronique ont elargi le domaine d'investigation au milieu aqueux. Les modifications de la reponse electrochimique du couple redox fe(ii)/fe(iii) suite a l'ajout d'halogenures ont mis en avant une selectivite identique du bore vis-a-vis des ions fluorure. L'interet d'utiliser de telles structures dans l'eau reside dans la possibilite de detecter d'autres molecules de type polyol. L'etude electrochimique a demontre une affinite particuliere vis-a-vis du d-fructose parmi d'autres sucres.

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Torres, Villa Robinsón Alberto. "Instrumental techniques for improving the measurements based on Quartz Crystal Microbalances (Técnicas instrumentales para mejorar las mediciones con microbalanzas de cuarzo)." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/17323.

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L'Electrogravimetria AC empra una microbalança de quars electroquímica (EQCM) en règim dinàmic. En l'EQCM un dels elèctrodes d'or depositats sobre el cristall és recobert amb una fina pelolícula d'un polímer electroactiv i és emprat com a elèctrode de treball (WE) dins d'una celola electroquímica. Les variacions de la freqüència de ressonància de la microbalança de quars (QCM) permeten obtindre la resposta massa associada amb la transferència de càrrega que es dóna en la interfície polímer-electròlit. L'Electrogravimetria AC va ser proposta a fi de caracteritzar i separadament identificar el moviment dels ions i el solvent en la interfície polímer-electròlit. En esta tècnica s'analitza en el domine de la freqüència la resposta de massa davant de xicotetes pertorbacions de voltatge gràcies a l'ocupació de la microbalança de quars en règim dinàmic. Per a este propòsit s'aplica una xicoteta pertorbació sinusoidal superposada a una tensió contínua, entre l'elèctrode de referència i l'elèctrode de treball de la celola. Posteriorment, es pot dibuixar la funció de transferència electrogravimètrica (EGTF), definida esta com la raó (?m/?E) entre l'amplitud dels canvis de massa induïts (?m) i l'amplitud de la pertorbació sinusoïdal aplicada (?E). Esta funció de transferència se dibuixa en un pla complex per a cada una de les freqüències de la senyal de pertorbació. Les distintes espècies iònicas involucrades són identificades en el pla complex per mitjà de bucles característics sempre que els bucles no se superposen. Per mitjà d'esta tesi doctoral es proposa un nou sistema de conversió de freqüència-tensió basat en un doble ajust de freqüència implementat amb un PLL mesclant elements analògics i digitals (AD PLL). Els resultats trobats tant en la caracterització electrònica del dispositiu com en la fase experimental proven la fiabilitat del sistema per als mesuraments realitzats en la tècnica d'Electrogravimetria AC.
Torres Villa, RA. (2007). Instrumental techniques for improving the measurements based on Quartz Crystal Microbalances (Técnicas instrumentales para mejorar las mediciones con microbalanzas de cuarzo) [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/17323
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Alsubhi, Abdulaziz. "Synthesis and Characterization of Electroactive Vinylidene Fluoride Based Block Copolymers via Iodine Transfer Polymerization." Thesis, 2020. http://hdl.handle.net/10754/664140.

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Abstract: Poly (vinylidene fluoride) (PVDF), thanks to its versatile properties, finds many applications ranging from water purification membranes (thermal and chemical stability) to electronic devices (piezoelectric, pyroelectric and ferroelectric properties). Block copolymers of PVDF with other polymers further expand its properties and, consequently, its applications. Toward this line, my thesis investigates the synthesis, molecular characterization and properties of novel PVDF-based copolymers mainly with poly(tert-butyl acrylate) (PtBuA), poly(methyl methacrylate) (PMMA) and polystyrene (PSt). To prepare the block copolymers a living polymerization is needed, which is compatible with the VDF and the comonomer (tBuA, MMA, St). For this purpose, we used iodine transfer polymerization (ITP) with the difunctional chain transfer agent (CTA) C4F8I2. Difunctional macroinitiator (I-PVDF-I) was first obtained by ITP of VDF monomer with C4F8I2, followed by addition of the comonomer tBuA, MMA or St to afford the triblock copolymers poly(tert-butyl acrylate)-block-poly(vinylidene fluoride)-block-poly(tert-butyl acrylate) (PtBuA-b-PVDF-b-PtBuA), poly(methyl methacrylate)-block-poly(vinylidene fluoride)-block-poly(methyl methacrylate) (PMMA-b-PVDF-b-PMMA) and polystyrene-block-poly(vinylidene fluoride)-block-polystyrene (PSt-b-PVDF-b-PSt). The structure of all intermediates and final products were characterized by Nuclear Magnetic Resonance (NMR) and Gel Permeation Chromatography (GPC). The microstructure and polymorphism of all triblock copolymers, characterized by XRD, shown that the PVDF in the first two copolymers exhibits the electroactive β-phase, while in the third copolymer there is the coexistence of α- and γ-phases. Linear PVDF homopolymers, using the free radical and IT polymerizations, were prepared for comparison purposes. All linear polymers possess the α-phase. The thesis is divided into the following five chapters: 1. Introduction, where the scope of this thesis is given with a brief background on PVDF; 2. Literature Review, where a summary of previously published works on PVDF synthesis and polymorphism is presented; 3. Experimental Section, where detailed procedures and characterization methods are given; 4. Results and Discussion, where outcomes of successful experiments are discussed; and 5. Conclusion and Perspective, where the outcomes of this work are summarized and perspective are discussed.

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Book chapters on the topic "Electroactive phase"

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Kavc, Thomas, Wolfgang Kern, Christian Zenz, Günther Leising, Gerald Kranzelbinder, and Eric Toussaere. "Phase Gratings in Photoreactive Polymers: A Way to Optically Pumped Organic Lasers." In Electroactive Materials, 111–20. Vienna: Springer Vienna, 2001. http://dx.doi.org/10.1007/978-3-7091-6211-8_11.

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Kobayashi, Takayoshi, Toshiaki Hattori, Akira Terasaki, and Kenji Kurokawa. "Femtosecond Studies of Dephasing and Phase Conjugation With Incoherent Light." In Nonlinear Optical and Electroactive Polymers, 137–55. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0953-6_7.

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Mathew, Minu, Sithara Radhakrishnan, and Chandra Sekhar Rout. "Recent Developments in All-Solid-State Micro-Supercapacitors Based on Two-Dimensional Materials." In Nanofibers [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94535.

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Owing to their unique features such as high surface area, rich electroactive sites, ultrathin thickness, excellent flexibility and mechanical stability and multiple surface functionalities enables outstanding electrochemical response which provides high energy and power density supercapacitors based on them. Also, the Van der Waals gap between layered 2D materials encourages the fast ion transport with shorter ion diffusion path. 2D materials such as MXenes, graphene, TMDs, and 2D metal–organic frame work, TMOs/TMHs materials, have been described with regard to their electrochemical properties for MSCs. We have summarized the recent progress in MSC based on well-developed 2D materials-based electrodes and its potential outcomes with different architectures including interdigitated pattern, stacked MSC and 3D geometries for on-chip electronics. This chapter provides a brief overview of the recent developments in the field of 2D material based all-solid-state microsupercapacitors (MSCs). A brief note on the MSC device configuration and microfabrication methods for the microelectrodes have been discussed. Taking advantage of certain 2D materials such as 2D MXenes, TMDs, TMOs/TMHs that provide good surface chemistry, tunable chemical and physical properties, intercalation, surface modification (functionalization), heterostructures, phase transformations, defect engineering etc. are beneficial for enhancement in pseudocapacitance as it promotes the redox activity.

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Conference papers on the topic "Electroactive phase"

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Qiu, Yu, Zhi Ren, Wei Hu, Chao Liu, and Qibing Pei. "Bistable electroactive polymer with sharp rigid-to-rubbery phase transition." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Yoseph Bar-Cohen and Frédéric Vidal. SPIE, 2016. http://dx.doi.org/10.1117/12.2219310.

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Chandraiahgari, C. R., G. De Bellis, A. Martinelli, A. Bakry, A. Tamburrano, and M. S. Sarto. "Nanofiller induced electroactive phase formation in solution derived poly(vinylidene fluoride) polymer composites." In 2015 IEEE 15th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2015. http://dx.doi.org/10.1109/nano.2015.7388884.

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Asghar, Ammar Hasan, Shafqat Abbas, Adnan Qaseem, Tayyaba Kokab, Asad Tajammul, Adnan Ramzan, Shaukat Saeed, and Uzair Iqbal. "Synthesis and characterization of PVDF/clay/PZT nanocomposites with enhanced electroactive β-phase." In 2021 International Bhurban Conference on Applied Sciences and Technologies (IBCAST). IEEE, 2021. http://dx.doi.org/10.1109/ibcast51254.2021.9393167.

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Bhardwaj, Sumit, Subhash Chand, K. K. Raina, and Ravi Kumar. "Effect of Bi4Ti3O12 nanoparticles on the electroactive phase content of poly (vinylidene-difluoride) composite films." In ADVANCED MATERIALS AND RADIATION PHYSICS (AMRP-2015): 4th National Conference on Advanced Materials and Radiation Physics. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4929285.

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Maity, Kuntal, and Dipankar Mandal. "The nucleation of self-poled electroactive β-phase in Eu3+ doped PVDF nanocomposite film for optoelectronic devices." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5028719.

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Chen, Zheng, Tae I. Um, Jianzhong Zhu, and Hilary Bart-Smith. "Bio-Inspired Robotic Cownose Ray Propelled by Electroactive Polymer Pectoral Fin." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64174.

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The cownose ray (Rhinoptera bonasus) demonstrates excellent swimming capabilities; generating highly efficient thrust via flapping of dorsally flattened pectoral fins. In this paper, we present a bio-inspired and free swimming robot that mimics the swimming behavior of the cownose ray. The robot has two artificial pectoral fins to generate thrust through a twisted flapping motion. Each artificial pectoral fin consists of one ionic polymer-metal composite (IPMC) as artificial muscle in the leading edge and a passive PDMS membrane in the trailing edge. By applying voltage signal to the IPMC, the passive PDMS membrane follows the bending of IPMC with a phase delay, which leads to a twist angle on the fin. The characterization results have shown that the pectoral fin was able to generate up to 40% tip deflection and 10° twist angle with less than 1 Watt power consumption. A bio-inspired rigid body was designed using Computerized Axial Tomography (CT Scan) data of the cownose ray body and printed using a 3-dimensional printer. A light and compact on-board control unit with a lithium ion polymer battery has been developed for the free swimming robot. Experimental results have shown that the robot swam at 0.034 BL/S.

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Alam, Md Mehebub, and Dipankar Mandal. "The inclusion of electroactive β-phase in Sn2+ incorporated PVDF composite film for improving dielectric properties and piezoelectric energy generation." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5029188.

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Huang, Jiefang, Songjia Han, Hui-Jiuan Chen, Zhenhua Luo, Han-Ping D. Shieh, Zixin Wang, and Bo-Ru Yang. "Enhancement of electroactive phases of PVDF by mixing SiC nanowires for pressure sensing." In 2016 10th International Conference on Sensing Technology (ICST). IEEE, 2016. http://dx.doi.org/10.1109/icsenst.2016.7796278.

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