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.

Download or read book Thin Films and Heterostructures for Oxide Electronics written by Satishchandra B. Ogale and published by Springer Science & Business Media. This book was released on 2005-11-21 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxides form a broad subject area of research and technology development which encompasses different disciplines such as materials science, solid state chemistry, physics etc. The aim of this book is to demonstrate the interplay of these fields and to provide an introduction to the techniques and methodologies involving film growth, characterization and device processing. The literature in this field is thus fairly scattered in different research journals covering one or the other aspect of the specific activity. This situation calls for a book that will consolidate this information and thus enable a beginner as well as an expert to get an overall perspective of the field, its foundations, and its projected progress.

Download or read book Functional Oxide Based Thin Film Materials written by Dong-Sing Wuu and published by MDPI. This book was released on 2020-05-29 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue on Functional Oxide-Based Thin-Film Materials touches on the latest advancements in several aspects related to material science: the synthesis of novel oxide, photoluminescence characteristics, photocatalytic ability, energy storage, light emitter studies, low-emissivity glass coatings, and investigations of both nanostructure and thin-film properties. It represents an amalgamation of specialists working with device applications and shedding light on the properties and behavior of thin-film oxides (e.g., GaOx, Ga2O3, HfO2, LiNbO3, and doped ZnO, among numerous others). The papers cover many aspects of thin-film science and technology, from thin film to nanostructure and from material properties to optoelectronic applications, thus reflecting the many interests of the community of scientists active in the field.

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.

Download or read book Functional Oxide Thin Films and Heterostructures for Innovative Devices written by S. Fujita and published by . This book was released on 2013 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thin Films and Heterostructures for Oxide Electronics written by Satishchandra B. Ogale and published by Springer. This book was released on 2008-11-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxides form a broad subject area of research and technology development which encompasses different disciplines such as materials science, solid state chemistry, physics etc. The aim of this book is to demonstrate the interplay of these fields and to provide an introduction to the techniques and methodologies involving film growth, characterization and device processing. The literature in this field is thus fairly scattered in different research journals covering one or the other aspect of the specific activity. This situation calls for a book that will consolidate this information and thus enable a beginner as well as an expert to get an overall perspective of the field, its foundations, and its projected progress.

Download or read book Chemical Solution Deposition of Functional Oxide Thin Films written by Theodor Schneller and published by Springer Science & Business Media. This book was released on 2014-01-24 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first text to cover all aspects of solution processed functional oxide thin-films. Chemical Solution Deposition (CSD) comprises all solution based thin- film deposition techniques, which involve chemical reactions of precursors during the formation of the oxide films, i. e. sol-gel type routes, metallo-organic decomposition routes, hybrid routes, etc. While the development of sol-gel type processes for optical coatings on glass by silicon dioxide and titanium dioxide dates from the mid-20th century, the first CSD derived electronic oxide thin films, such as lead zirconate titanate, were prepared in the 1980’s. Since then CSD has emerged as a highly flexible and cost-effective technique for the fabrication of a very wide variety of functional oxide thin films. Application areas include, for example, integrated dielectric capacitors, ferroelectric random access memories, pyroelectric infrared detectors, piezoelectric micro-electromechanical systems, antireflective coatings, optical filters, conducting-, transparent conducting-, and superconducting layers, luminescent coatings, gas sensors, thin film solid-oxide fuel cells, and photoelectrocatalytic solar cells. In the appendix detailed “cooking recipes” for selected material systems are offered.

Download or read book Thin Film Metal Oxides written by Shriram Ramanathan and published by Springer. This book was released on 2010-05-03 with total page 337 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.

Download or read book Metal Oxide Based Thin Film Structures written by Nini Pryds and published by Elsevier. This book was released on 2017-09-07 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide-Based Thin Film Structures: Formation, Characterization and Application of Interface-Based Phenomena bridges the gap between thin film deposition and device development by exploring the synthesis, properties and applications of thin film interfaces. Part I deals with theoretical and experimental aspects of epitaxial growth, the structure and morphology of oxide-metal interfaces deposited with different deposition techniques and new developments in growth methods. Part II concerns analysis techniques for the electrical, optical, magnetic and structural properties of thin film interfaces. In Part III, the emphasis is on ionic and electronic transport at the interfaces of Metal-oxide thin films. Part IV discusses methods for tailoring metal oxide thin film interfaces for specific applications, including microelectronics, communication, optical electronics, catalysis, and energy generation and conservation. This book is an essential resource for anyone seeking to further their knowledge of metal oxide thin films and interfaces, including scientists and engineers working on electronic devices and energy systems and those engaged in research into electronic materials. Introduces the theoretical and experimental aspects of epitaxial growth for the benefit of readers new to the field Explores state-of-the-art analysis techniques and their application to interface properties in order to give a fuller understanding of the relationship between macroscopic properties and atomic-scale manipulation Discusses techniques for tailoring thin film interfaces for specific applications, including information, electronics and energy technologies, making this book essential reading for materials scientists and engineers alike

Download or read book Integration of Functional Oxides with Semiconductors written by Alexander A. Demkov and published by Springer Science & Business Media. This book was released on 2014-02-20 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the basic physical principles of the oxide/semiconductor epitaxy and offers a view of the current state of the field. It shows how this technology enables large-scale integration of oxide electronic and photonic devices and describes possible hybrid semiconductor/oxide systems. The book incorporates both theoretical and experimental advances to explore the heteroepitaxy of tuned functional oxides and semiconductors to identify material, device and characterization challenges and to present the incredible potential in the realization of multifunctional devices and monolithic integration of materials and devices. Intended for a multidisciplined audience, Integration of Functional Oxides with Semiconductors describes processing techniques that enable atomic-level control of stoichiometry and structure and reviews characterization techniques for films, interfaces and device performance parameters. Fundamental challenges involved in joining covalent and ionic systems, chemical interactions at interfaces, multi-element materials that are sensitive to atomic-level compositional and structural changes are discussed in the context of the latest literature. Magnetic, ferroelectric and piezoelectric materials and the coupling between them will also be discussed. GaN, SiC, Si, GaAs and Ge semiconductors are covered within the context of optimizing next-generation device performance for monolithic device processing.

Download or read book Functional Oxide Thin Films and Nanostructures written by Paolo Mele and published by Mdpi AG. This book was released on 2022-10-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue of Coatings is entitled "Functional Oxide Thin Films and Nanostructures: Growth, Properties, and Applications". Recent materials nanotechnologies have created possibilities regarding the fabrication of oxide thin films at the nanometric level and other nanocomposites' fabrication. In parallel, recent measurement technologies can characterize their unique properties arising from the limited regions of surfaces and interfaces. This Special Issue provides an opportunity to share surface-related science and engineering topics on oxide thin films and nanocomposites in an interactive and interdisciplinary manner. The ultimate goal is to elucidate the commonalities and differences between multilayer interfaces and nanocomposite grain boundaries. This Special Issue is as an effort to bridge the gap between materials science and the applications of oxide thin films and nanostructures. The topics covered in this Special Issue range from nanoparticles to thin films, heterostructures, and homojunctions and are related to various aspects of oxide materials' preparation, characterization, and applications.

Download or read book Functional Oxide Thin Films and Nanostructures Growth Properties and Applications written by Paolo Mele and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue of Coatings is entitled "Functional Oxide Thin Films and Nanostructures: Growth, Properties, and Applications". Recent materials nanotechnologies have created possibilities regarding the fabrication of oxide thin films at the nanometric level and other nanocomposites' fabrication. In parallel, recent measurement technologies can characterize their unique properties arising from the limited regions of surfaces and interfaces. This Special Issue provides an opportunity to share surface-related science and engineering topics on oxide thin films and nanocomposites in an interactive and interdisciplinary manner. The ultimate goal is to elucidate the commonalities and differences between multilayer interfaces and nanocomposite grain boundaries. This Special Issue is as an effort to bridge the gap between materials science and the applications of oxide thin films and nanostructures. The topics covered in this Special Issue range from nanoparticles to thin films, heterostructures, and homojunctions and are related to various aspects of oxide materials' preparation, characterization, and applications.

Download or read book Solution Processed Metal Oxide Thin Films for Electronic Applications written by Zheng Cui and published by Elsevier. This book was released on 2020-06-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solution Processed Metal Oxide Thin Films for Electronic Applications discusses the fundamentals of solution processing materials chemistry techniques as they are applied to metal oxide materials systems for key device applications. The book introduces basic information (materials properties, materials synthesis, barriers), discusses ink formulation and solution processing methods, including sol-gel processing, surface functionalization aspects, and presents a comprehensive accounting on the electronic applications of solution processed metal oxide films, including thin film transistors, photovoltaic cells and other electronics devices and circuits. This is an important reference for those interested in oxide electronics, printed electronics, flexible electronics and large-area electronics. Provides in-depth information on solution processing fundamentals, techniques, considerations and barriers combined with key device applications Reviews important device applications, including transistors, light-emitting diodes, and photovoltaic cells Includes an overview of metal oxide materials systems (semiconductors, nanomaterials and thin films), addressing materials synthesis, properties, limitations and surface aspects

Download or read book Functional Oxide Based Thin Film Materials written by Dong-Sing Wuu and published by . This book was released on 2020 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue on Functional Oxide-Based Thin-Film Materials touches on the latest advancements in several aspects related to material science: the synthesis of novel oxide, photoluminescence characteristics, photocatalytic ability, energy storage, light emitter studies, low-emissivity glass coatings, and investigations of both nanostructure and thin-film properties. It represents an amalgamation of specialists working with device applications and shedding light on the properties and behavior of thin-film oxides (e.g., GaOx, Ga2O3, HfO2, LiNbO3, and doped ZnO, among numerous others). The papers cover many aspects of thin-film science and technology, from thin film to nanostructure and from material properties to optoelectronic applications, thus reflecting the many interests of the community of scientists active in the field.

Download or read book Functional Thin Films and Special Coatings written by Tomasz Ta?ski and published by Trans Tech Publications Ltd. This book was released on 2019-07-09 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of thin film materials and coatings, design and manufacture for a wide variety of application areas. In particular, the topics of interest include fabrication of thin films by electrospinning, a thin film for solar energy conversion, optical and electrical investigation of thin films and special coatings, applications of PVD/ALD coatings, low friction thin layers. We hope that the presented research results and recommendations will be interesting and useful for engineers and researchers from various areas of engineering.

Download or read book Integration of Multi functional Oxide Thin Film Heterostructures with III V Semiconductors written by Md Shafiqur Rahman and published by . This book was released on 2017 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integration of multi-functional oxide thin films with semiconductors has attracted considerable attention in recent years due to their potential applications in sensing and logic functionalities that can be incorporated in future system-on-a-chip devices. III-V semiconductor, for example, GaAs, have higher saturated electron velocity and mobility allowing transistors based on GaAs to operate at a much higher frequency with less noise compared to Si. In addition, because of its direct bandgap a number of efficient optical devices are possible and by oxide integrating with other III-V semiconductors the wavelengths can be made tunable through hetero-engineering of the bandgap. This study, based on the use of SrTiO3 (STO) films grown on GaAs (001) substrates by molecular beam epitaxy (MBE) as an intermediate buffer layer for the hetero-epitaxial growth of ferromagnetic La0.7Sr0.3MnO3 (LSMO) and room temperature multiferroic BiFeO3 (BFO) thin films and superlattice structures using pulsed laser deposition (PLD). The properties of the multilayer thin films in terms of growth modes, lattice spacing/strain, interface structures and texture were characterized by the in-situ reflection high energy electron diffraction (RHEED). The crystalline quality and chemical composition of the complex oxide heterostructures were investigated by a combination of X-ray diffraction (XRD) and X-ray photoelectron absorption spectroscopy (XPS). Surface morphology, piezo-response with domain structure, and ferroelectric switching observations were carried out on the thin film samples using a scanning probe microscope operated as a piezoresponse force microscopy (PFM) in the contact mode. The magnetization measurements with field cooling exhibit a surprising increment in magnetic moment with enhanced magnetic hysteresis squareness. This is the effect of exchange interaction between the antiferromagnetic BFO and the ferromagnetic LSMO at the interface. The integration of BFO materials with LSMO on GaAs substrate also facilitated the demonstration of resistive random access memory (ReRAM) devices which can be faster with lower energy consumption compared to present commercial technologies. Ferroelectric switching observations using piezoresponse force microscopy show polarization switching demonstrating its potential for read-write operation in NVM devices. The ferroelectric and electrical characterization exhibit strong resistive switching with low SET/RESET voltages. Furthermore, a prototypical epitaxial field effect transistor based on multiferroic BFO as the gate dielectric and ferromagnetic LSMO as the conducting channel was also demonstrated. The device exhibits a modulation in channel conductance with high ON/OFF ratio. The measured nanostructure and physical-compositional results from the multilayer are correlated with their corresponding dielectric, piezoelectric, and ferroelectric properties. These results provide an understanding of the heteroepitaxial growth of ferroelectric (FE)-antiferromagnetic (AFM) BFO on ferromagnetic LSMO as a simple thin film or superlattice structure, integrated on STO buffered GaAs (001) with full control over the interface structure at the atomic-scale. This work also represents the first step toward the realization of magnetoelectronic devices integrated with GaAs (001).

Download or read book Transition Metal Oxide Thin Film based Chromogenics and Devices written by Pandurang Ashrit and published by . This book was released on 2017 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: