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Vanadium Based Mixedoxide Thin Films Electrochromic Behavior And Electrochemical Characterization
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Book Synopsis Vanadium Based Mixedoxide Thin Films: Electrochromic Behavior and Electrochemical Characterization by : Florinda Artuso
Download or read book Vanadium Based Mixedoxide Thin Films: Electrochromic Behavior and Electrochemical Characterization written by Florinda Artuso and published by . This book was released on 2001 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrochromic Properties of Vanadium Pentoxide Nanostructured Thin Films by : Afaf Almoabadi
Download or read book Electrochromic Properties of Vanadium Pentoxide Nanostructured Thin Films written by Afaf Almoabadi and published by . This book was released on 2015 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT Electrochromic Properties of Vanadium Pentoxide Nanostructured Thin Films Afaf Almoabadi The focus of this work is the improvement of the electrochromic properties of vanadium pentoxide thin films in order to expand its use. Indeed, because of its rather poor electrochromic properties, until now, vanadium pentoxide has only been used as a storage material in an electrochromic device, in conjunction with tungsten oxide, molybdenum oxide etc. To this purpose, vanadium pentoxide thin films were prepared under different conditions and characterized by using optical and electrochemical methods. Films were deposited on indium tin oxide (ITO) substrates by dip-coating at both room- and sub-zero temperature (-100C) and porosity in the sol-gel prepared vanadium pentoxide film was created by using templating methods. The morphology, optical and electrochromic properties of the macro- and mesoporous films, prepared in the presence of structure-directing agents such as polystyrene microspheres and triblock copolymer, have been compared with those of dense films. By using various methods to remove the template material, it was shown that the morphology of the vanadium pentoxide film can be controlled and new nanostructures can be created. The transformation of the lamellar into a nanorod structure, observed when the film is heated at 425-500◦C for several hours, resulted in the development of an elegant method for the synthesis of vanadium oxide nanostructures. The electrochromic performance of the nanorods prepared through the thermal treatment was found to be superior to that of the vanadium pentoxide with the layered structure, especially in the near-infrared region, demonstrating their potential for electrochromic applications. The structure, morphology, optical and electrochromic properties of dense and porous vanadium oxide films, coated at low temperature were also determined and compared to those of the corresponding films, deposited under room-temperature conditions. The results indicated that in the films coated at -100C, a residual compressive stress exists that originates from a non-uniformity in depth of the film, most probably, due to the formation of micro voids during the deposition. The micro voids are preserved during the heat-treatment of the films. The "micro void" morphology was found to account for the considerably improved electrochromic properties of the sub-zero dip-coated films. Low-temperature coated films, heated at 4500C for several hours, undergo the transformation from a layered to a highly uniform nanorod structure with important potential optoelectronic applications. The overall aim of this work is thus to evaluate how the morphology of vanadium pentoxide thin films is instrumental in obtaining a material with a high lithium ion intercalation capacity. With an appropriate morphology, the performance of vanadium oxide as electrochromic material and as cathode in lithium ion batteries can be improved significantly. For this purpose, both layered (dense and porous) and nanorod films were prepared and characterized. Scanning electron microscopy, cyclic voltammetry and electrical impedance spectroscopy measurements were used for the characterization of the different V2O5 films.
Book Synopsis Electrochromic Nickel-tungsten Oxides by :
Download or read book Electrochromic Nickel-tungsten Oxides written by and published by . This book was released on 2012 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Functional Oxide Thin Films for Micromechanical and Bioelectronic Devices by : Maximilian Becker
Download or read book Functional Oxide Thin Films for Micromechanical and Bioelectronic Devices written by Maximilian Becker and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present cumulative thesis discusses the challenging and exciting way to utilize the outstanding physical properties of functional oxide materials for the development of new applications and devices, with a focus on the integration of lead-free ferroelectric thin films into bioelectronics. The cumulative thesis comprises four publications - Publication I - IV - and is organized as follows. The first part (Publication I + II) is devoted to the pulsed laser deposition (PLD) of lead-free 0.5(Ba0:7Ca0:3)TiO3-0.5Ba(Zr0:2Ti0:8)O3 (BCZT) ferroelectric thin films on different substrates and their detailed electrical characterization and analysis by impedance spectroscopy. For the deconvolution of measured impedance spectra by equivalent-circuit fitting, a new equivalentcircuit element based on the theory of interface pinning in random systems - the domain wall pinning element - is introduced which models the impedance of a ferroelectric including the contribution from domain-wall-motion in the subswitching regime. This approach is applied to impedance spectra collected on polycrystalline and epitaxial BCZT thin film capacitor stacks, and the domain-wall-motion induced field- and frequency-dependent dielectric response of the BCZT films is extracted by domain wall pinning element modeling and equivalent-circuit fitting. Moreover, an extended Rayleigh analysis is presented which allows one to quantify the coupling strength between dielectric nonlinearity and frequency dispersion and the identification of different domain-wall-motion regimes in the BCZT films. The corresponding domain-wall dynamics in the BCZT thin films is discussed in detail and a schematic diagram of the different domain-wall-motion regimes is presented. The results from the extended Rayleigh analysis - obtained on epitaxial and polycrystalline BCZT films - indicate, that the presence of grain boundaries in BCZT reduces the coupling strength between dielectric nonlinearity and frequency dispersion and suppresses the motion of internal domain-wall segments in addition to the suppression of the irreversible center-of-mass motion of the domain walls. In the second part (Publication III), microelectrodes based on conductive sputtered IrO2 films (SIROFs) - which are utilized to provide electro-neural interfaces for subretinal stimulation in the state-of-the-art retinal prosthesis “Retina Implant Alpha AMS” - are analyzed in detail by electrochemical impedance spectroscopy (EIS) and subsequent equivalent-circuit analysis. The supercapacitive behavior of the investigated SIROF-microelectrodes is modeled by a pseudocapacitance Cp in parallel to the capacitance of the electrochemical double layer CDL, and both capacitances are represented by a constant phase element (CPE) in the equivalent-circuit model. By fitting the measured EIS data with the equivalent-circuit model, Cp and CDL are quantified from the obtained CPE fit parameters, and the resulting supercapacitive behavior is in agreement with cyclic voltammetry measurements. The results indicate, that the pseudocapacitance Cp due to quasi-continuous reversible reduction and oxidation between Ir3+/ Ir4+ valence states is the dominant contribution to the supercapacitance and to the charge injection capacity (CIC) of the investigated SIROF-microelectrodes. Finally, in the third part (Publication IV), a new approach for bioelectronic interfacing of electrogenic cells or tissue is introduced, which utilizes a conductive microelectrode coated with an insulating ferroelectric layer for extracellular electrical stimulation. It is shown, that the ferroelectric polarization current contributes to the extracellular stimulation current provided by the ferroelectric microelectrode. The switching regime of a ferroelectric microelectrode in an electrolyte-ferroelectric-conductor configuration is analyzed based on the traditional Kolmogorov-Avrami-Ishibashi (KAI)-model and the time-dependent stimulation current in response to an applied voltage step is simulated for a generic microelectrode geometry. It is shown that, depending on the remanent polarization Pr of the utilized ferroelectric, the polarization current in the switching regime can increase the CIC by up to two orders of magnitude as compared to the commonly used extracellular capacitive stimulation with microelectrodes coated with an insulating dielectric layer. The results pave the way for extracellular electrical stimulation with small microelectrodes (30 um in diameter) without toxic electrochemical effects, which is crucial for implantable neuroprosthetic devices such as high-resolution retinal-implants or brain-machine interfaces.
Book Synopsis Electrochromism and Electrochromic Devices by : Paul Monk
Download or read book Electrochromism and Electrochromic Devices written by Paul Monk and published by Cambridge University Press. This book was released on 2007-11-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochromic materials, both organic and inorganic, have widespread applications in light-attenuation, displays and analysis. Written in an accessible manner, this book provides a comprehensive treatment of all types of electrochromic systems and their many applications. Coverage develops from electrochromic scope and history to new searching presentations of optical quantification and theoretical mechanistic models. Non-electrode electrochromism and photo-electrochromism are summarised, with updated comprehensive reviews of electrochromic oxides (tungsten-trioxide particularly), metal co-ordination complexes and metal-cyanometallates, viologens and other organics; and more recent exotics such as fullerenes, hydrides, and conjugated electroactive polymers are also covered. The book concludes by examining device construction and durability. With an extensive bibliography, recent advances in the field, modern applications and a step-by-step development from simple examples to sophisticated theories, this book is ideal for researchers in materials science, polymer science, electrical engineering, physics, chemistry, bioscience and (applied) optoelectronics.
Download or read book Ceramic Abstracts written by and published by . This book was released on 1998 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemically Deposited Nanocrystalline Metal Oxide Thin Films by : Fabian I. Ezema
Download or read book Chemically Deposited Nanocrystalline Metal Oxide Thin Films written by Fabian I. Ezema and published by Springer Nature. This book was released on 2021-06-26 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book guides beginners in the areas of thin film preparation, characterization, and device making, while providing insight into these areas for experts. As chemically deposited metal oxides are currently gaining attention in development of devices such as solar cells, supercapacitors, batteries, sensors, etc., the book illustrates how the chemical deposition route is emerging as a relatively inexpensive, simple, and convenient solution for large area deposition. The advancement in the nanostructured materials for the development of devices is fully discussed.
Download or read book Smart Structures and Materials written by and published by . This book was released on 2005 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrochromic Materials and Devices by : Roger J. Mortimer
Download or read book Electrochromic Materials and Devices written by Roger J. Mortimer and published by John Wiley & Sons. This book was released on 2015-10-26 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochromic materials can change their properties under the influence of an electrical voltage or current. Different classes of materials show this behavior such as transition metal oxides, conjugated polymers, metal-coordinated complexes and organic molecules. As the color change is persistent, the electric field needs only to be applied to initiate the switching, allowing for applications such as low-energy consumption displays, light-adapting mirrors in the automobile industry and smart windows for which the amount of transmitted light and heat can be controlled. The first part of this book describes the different classes and processing techniques of electrochromic materials. The second part highlights nanostructured electrochromic materials and device fabrication, and the third part focuses on the applications such as smart windows, adaptive camouflage, biomimicry, wearable displays and fashion. The last part rounds off the book by device case studies and environmental impact issues.
Book Synopsis Thin Film Metal-Oxides by : Shriram Ramanathan
Download or read book Thin Film Metal-Oxides written by Shriram Ramanathan and published by Springer Science & Business Media. This book was released on 2009-12-03 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin Film Metal-Oxides provides a representative account of the fundamental structure-property relations in oxide thin films. Functional properties of thin film oxides are discussed in the context of applications in emerging electronics and renewable energy technologies. Readers will find a detailed description of deposition and characterization of metal oxide thin films, theoretical treatment of select properties and their functional performance in solid state devices, from leading researchers. Scientists and engineers involved with oxide semiconductors, electronic materials and alternative energy will find Thin Film Metal-Oxides a useful reference.
Book Synopsis Meeting Abstracts by : Electrochemical Society. Meeting
Download or read book Meeting Abstracts written by Electrochemical Society. Meeting and published by . This book was released on 1999 with total page 1668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrochromism by : Paul M. S. Monk
Download or read book Electrochromism written by Paul M. S. Monk and published by John Wiley & Sons. This book was released on 2008-09-26 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochromic devices have a number of important commercial applications, for instance in displays, as optical shutters, and as modulators for mirrors, windows, and sun-glasses. Electrochromism - Fundamentals and Applications is the first in-depth treatise on the topic. Written by leading scientists in the field, it is a state-of-the-art account of all aspects of electrochromism, presented at a level accessible to chemists, physicists, materials scientists and engineers. Both the physical and chemical background of electrochromic phenomena are described and a comprehensive survey of both organic and inorganic compounds and systems is given. Special emphasis is placed on providing detailed, hands-on information on applications and potential uses of electrochromic systems. This book is essential reading for scientists active in the field and for anyone wishing to enter the field. An extensive list of carefully chosen references rounds off this valuable reference source.
Book Synopsis Hybrid Organic-Inorganic Interfaces by : Marie Helene Delville
Download or read book Hybrid Organic-Inorganic Interfaces written by Marie Helene Delville and published by John Wiley & Sons. This book was released on 2018-04-09 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: Das erste Handbuch und gut zugängliche Referenzwerk zu diesem zunehmend wichtigen Thema erläutert in einem anwendungsorientierten Ansatz Synthese, Design, Charakterisierung und Simulation von Grenzflächen bei hybriden organisch-anorganischen Materialien.
Book Synopsis New Promising Electrochemical Systems for Rechargeable Batteries by : V. Barsukov
Download or read book New Promising Electrochemical Systems for Rechargeable Batteries written by V. Barsukov and published by Springer Science & Business Media. This book was released on 1996-02-29 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electricity is the most important secondary energy source, the present production rate, mainly from thermal electric power stations, being of the order of 1.3 TW. However, the total capacity of primary and rechargeable batteries currently in use is the same as the output of the world's power stations. But present battery systems will not meet future needs for the economical storage of large amounts of electrical energy for vehicles, public transport, road levelling, solar energy utilisation, civil video and audio, terrestrial and space communications, etc. Current accumulators based on aqueous acid or alkali systems do not have sufficient output and, moreover, the materials employed (Pb, Cd, Ni) are environmental pollutants that require safe recycling. Further, stocks of these strategic metals are being rapidly depleted. This book discusses actual field results with novel systems, such as rechargeable lithium batteries, zinc/air cells, metal-free accumulators, graphite/carbon devices and others, including fuel cells. The book stresses that a universal electrochemical system is not feasible: the choice of any system must depend on the concrete field of application and must be taken in consideration of a large number of technical, economic and environmental circumstances.
Book Synopsis Electro-Fenton Process by : Minghua Zhou
Download or read book Electro-Fenton Process written by Minghua Zhou and published by Springer. This book was released on 2017-11-25 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the theoretical fundamentals and potential applications of the original electro-Fenton (EF) process and its most innovative and promising versions, all of which are classified as electrochemical advanced oxidation processes. It consists of 15 chapters that review the latest advances and trends, material selection, reaction and reactor modeling and EF scale-up. It particularly focuses on the applications of EF process in the treatment of toxic and persistent organic pollutants in water and soil, showing highly efficient removal for both lab-scale and pre-pilot setups. Indeed, the EF technology is now mature enough to be brought to market, and this collection of contributions from leading experts in the field constitutes a timely milestone for scientists and engineers.
Book Synopsis Electrochemical Impedance Spectroscopy by : Mark E. Orazem
Download or read book Electrochemical Impedance Spectroscopy written by Mark E. Orazem and published by John Wiley & Sons. This book was released on 2011-10-13 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using electrochemical impedance spectroscopy in a broad range of applications This book provides the background and training suitable for application of impedance spectroscopy to varied applications, such as corrosion, biomedical devices, semiconductors and solid-state devices, sensors, batteries, fuel cells, electrochemical capacitors, dielectric measurements, coatings, electrochromic materials, analytical chemistry, and imaging. The emphasis is on generally applicable fundamentals rather than on detailed treatment of applications. With numerous illustrative examples showing how these principles are applied to common impedance problems, Electrochemical Impedance Spectroscopy is ideal either for course study or for independent self-study, covering: Essential background, including complex variables, differential equations, statistics, electrical circuits, electrochemistry, and instrumentation Experimental techniques, including methods used to measure impedance and other transfer functions Process models, demonstrating how deterministic models of impedance response can be developed from physical and kinetic descriptions Interpretation strategies, describing methods of interpretating of impedance data, ranging from graphical methods to complex nonlinear regression Error structure, providing a conceptual understanding of stochastic, bias, and fitting errors in frequency-domain measurements An overview that provides a philosophy for electrochemical impedance spectroscopy that integrates experimental observation, model development, and error analysis This is an excellent textbook for graduate students in electrochemistry, materials science, and chemical engineering. It's also a great self-study guide and reference for scientists and engineers who work with electrochemistry, corrosion, and electrochemical technology, including those in the biomedical field, and for users and vendors of impedance-measuring instrumentation.
Book Synopsis New Trends in Intercalation Compounds for Energy Storage by : Christian Julien
Download or read book New Trends in Intercalation Compounds for Energy Storage written by Christian Julien and published by Springer Science & Business Media. This book was released on 2002-04-30 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in electrochemistry and materials science have opened the way to the evolution of entirely new types of energy storage systems: rechargeable lithium-ion batteries, electrochroms, hydrogen containers, etc., all of which have greatly improved electrical performance and other desirable characteristics. This book encompasses all the disciplines linked in the progress from fundamentals to applications, from description and modelling of different materials to technological use, from general diagnostics to methods related to technological control and operation of intercalation compounds. Designing devices with higher specific energy and power will require a more profound understanding of material properties and performance. This book covers the status of materials and advanced activities based on the development of new substances for energy storage.
