Download or read book Novel Approaches for the Synthesis of Large area 2D Thin Films by Magnetron Sputtering written by Hassana Samassekou and published by . This book was released on 2018 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This past decade, 2D materials beyond graphene, and most specifically transition metal dichalcogenides (TMDCs) have gained remarkable attention due to their novel applications in electronics and optoelectronics applications. This work reports large-area growth and structural, optical, and electronic transport properties of few-layer MoS2 thin films fabricated using a hybrid approach based on the magnetron sputtering method. In the first part of this dissertation, properties of optimally annealed MoS2 on different substrates such as amorphous BN, SiO2, Si, Al2O 3 are discussed using diffraction, spectroscopic, and transport techniques. Later, we show that the physical properties of large-area sputtered MoS 2 thin films can be dramatically improved by an ex-situ high-temperature sulfurization process as it leads to the formation of defect-free MoS 2 by removing sulfur vacancies. Sharp film-substrate interface along with high bulk structural order is demonstrated as inferred from diffraction and spectroscopic methods. We show that sulfur vacancies can obscure the MoS 2 A-B exciton peaks along with a sharp increase in dc conductivity of MoS2. In the last part of my dissertation, we outline the growth of a novel thermoelectric material (SnSe) and new magnetic inverse-Heuslers (of nominal composition MnxFeSi) using the co-sputtering method. These are some of the first attempts, to our knowledge, to grow such materials in thin-film form. Detailed structure-property relations are thoroughly discussed.

Download or read book Advanced Strategies in Thin Film Engineering by Magnetron Sputtering written by Alberto Palmero and published by MDPI. This book was released on 2020-12-10 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have witnessed the flourishing of numerous novel strategies based on the magnetron sputtering technique aimed at the advanced engineering of thin films, such as HiPIMS, combined vacuum processes, the implementation of complex precursor gases or the inclusion of particle guns in the reactor, among others. At the forefront of these approaches, investigations focused on nanostructured coatings appear today as one of the priorities in many scientific and technological communities: The science behind them appears in most of the cases as a "terra incognita", fascinating both the fundamentalist, who imagines new concepts, and the experimenter, who is able to create and study new films with as of yet unprecedented performances. These scientific and technological challenges, along with the existence of numerous scientific issues that have yet to be clarified in classical magnetron sputtering depositions (e.g., process control and stability, nanostructuration mechanisms, connection between film morphology and properties or upscaling procedures from the laboratory to industrial scales) have motivated us to edit a specialized volume containing the state-of-the art that put together these innovative fundamental and applied research topics. These include, but are not limited to: • Nanostructure-related properties; • Atomistic processes during film growth; • Process control, process stability, and in situ diagnostics; • Fundamentals and applications of HiPIMS; • Thin film nanostructuration phenomena; • Tribological, anticorrosion, and mechanical properties; • Combined procedures based on the magnetron sputtering technique; • Industrial applications; • Devices.

Download or read book Ultrathin Two Dimensional Semiconductors for Novel Electronic Applications written by Mohammad Karbalaei Akbari and published by CRC Press. This book was released on 2020-07-30 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering perspective on both the scientific and engineering aspects of 2D semiconductors, Ultrathin Two-Dimensional Semiconductors for Novel Electronic Applications discusses how to successfully engineer 2D materials for practical applications. It also covers several novel topics regarding 2D semiconductors which have not yet been discussed in any other publications. Features: Provides comprehensive information and data about wafer-scale deposition of 2D semiconductors, ranging from scientific discussions up to the planning of experiments and reliability testing of the fabricated samples Precisely discusses wafer-scale ALD and CVD of 2D semiconductors and investigates various aspects of deposition techniques Covers the new group of 2D materials synthesized from surface oxide of liquid metals and also explains the device fabrication and post-treatment of these 2D nanostructures Addresses a wide range of scientific and practical applications of 2D semiconductors and electronic and optoelectronic devices based on these nanostructures Offers novel coverage of 2D heterostructures and heterointerfaces and provides practical information about fabrication and application of these heterostructures Introduces the latest advancement in fabrication of novel memristors, artificial synapses and sensorimotor devices based on 2D semiconductors This work offers practical information valuable for engineering applications that will appeal to researchers, academics, and scientists working with and interested in developing an array of semiconductor electronic devices.

Download or read book 2D Materials for Electronics Sensors and Devices written by Saptarshi Das and published by Elsevier. This book was released on 2022-09-14 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2D Materials for Electronics, Sensors and Devices: Synthesis, Characterization, Fabrication and Application provides an overview of various top-down and bottom-up synthesis techniques, along with stitching, stacking and stoichiometric control methods for different 2D materials and their heterostructures. The book focuses on the widespread applications of various 2D materials in high-performance and low-power sensors, field effect devices, flexible electronics, straintronics, spintronics, brain-inspired electronics, energy harvesting and energy storage devices. This is an important reference for materials scientists and engineers looking to gain a greater understanding on how 2D materials are being used to create a range of low cost, sustainable products and devices. - Discusses the major synthesis and preparation methods of a range of emerging 2D electronic materials - Provides state-of–the-art information on the most recent advances, including theoretical and experimental studies and new applications - Discusses the major challenges of the mass application of 2D materials in industry

Download or read book Advanced Strategies in Thin Film Engineering by Magnetron Sputtering written by Alberto Palmero and published by . This book was released on 2020 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have witnessed the flourishing of numerous novel strategies based on the magnetron sputtering technique aimed at the advanced engineering of thin films, such as HiPIMS, combined vacuum processes, the implementation of complex precursor gases or the inclusion of particle guns in the reactor, among others. At the forefront of these approaches, investigations focused on nanostructured coatings appear today as one of the priorities in many scientific and technological communities: The science behind them appears in most of the cases as a "terra incognita", fascinating both the fundamentalist, who imagines new concepts, and the experimenter, who is able to create and study new films with as of yet unprecedented performances. These scientific and technological challenges, along with the existence of numerous scientific issues that have yet to be clarified in classical magnetron sputtering depositions (e.g., process control and stability, nanostructuration mechanisms, connection between film morphology and properties or upscaling procedures from the laboratory to industrial scales) have motivated us to edit a specialized volume containing the state-of-the art that put together these innovative fundamental and applied research topics. These include, but are not limited to: • Nanostructure-related properties; • Atomistic processes during film growth; • Process control, process stability, and in situ diagnostics; • Fundamentals and applications of HiPIMS; • Thin film nanostructuration phenomena; • Tribological, anticorrosion, and mechanical properties; • Combined procedures based on the magnetron sputtering technique; • Industrial applications; • Devices.

Download or read book Preparation of Thin Films written by Joy George and published by CRC Press. This book was released on 1992-02-26 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Preparation of Thin Films provides a comprehensive account of various deposition techniques for the preparation of thin films of elements, compounds, alloys, ceramics, and semiconductors - emphasizing inorganic compound thin films and discussing high vacuum and chemical deposition methods used for preparing high temperature superconducting oxide thin films. "

Download or read book Thin film materials technology written by Kiyotaka Wasa and published by Springer Science & Business Media. This book was released on 2004-09-24 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title contains rich historical coverage of the basics and new experimental and technological information about ceramic thin film and large-area functional coating. Included are principles and examples of making thin-film materials and devices.

Download or read book Xenes written by Alessandro Molle and published by Woodhead Publishing. This book was released on 2022-06-29 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Xenes: 2D Synthetic Materials Beyond Graphene includes all the relevant information about Xenes thus far reported, focusing on emerging materials and new trends. The book's primary goal is to include full descriptions of each Xene type by leading experts in the area. Each chapter will provide key principles, theories, methods, experiments and potential applications. The book also reviews the key challenges for synthetic 2D materials such as characterization, modeling, synthesis, and integration strategies. This comprehensive book is suitable for materials scientists and engineers, physicists and chemists working in academia and R&D in industry. The discovery of silicene dates back to 2012. Since then, other Xenes were subsequently created with synthetic methods. The portfolio of Xenes includes different chemical elements of the periodic table and hence the related honeycomb-like lattices show a wealth of electronic and optical properties that can be successfully exploited for applications. - Introduces the most important Xenes, including silicene, germanene, borophene, gallenene, phosphorene, and more - Provides the fundamental principles, theories, experiments and applications for the most relevant synthetic 2D materials - Addresses techniques for the characterization, synthesis and integration of synthetic 2D materials

Download or read book Crystallization of Two dimensional Transition Metal Dichalcogenides for Tailored Optical Properties written by Rachel H. Rai and published by . This book was released on 2019 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two dimensional (2D) semiconducting transition metal dichalcogenides (TMD) are new materials that exhibit unique and useful combinations of physical properties, such as photoluminescence (PL) in the visible to NIR frequencies coupled with mechanical flexibility. Such properties make 2D TMDs attractive candidates for the next generation of compact, unobtrusive, and low-cost opto-electronic technologies. However, the incorporation of 2D TMDs in commercial applications and products is currently limited by the absence of synthesis approaches yielding uniform, large area films with desired properties. Thus, this work encompasses innovative techniques to tailor optical properties of TMD thin films by controlling their area, thickness, grain size, defect density and uniformity during and after processing. These new approaches start with magnetron sputtering of ultra-thin amorphous TMD films on either flexible or rigid substrates. The amorphous precursor films were then subjected to illumination with energy beams to induce crystallization, including laser light, broadband radiation from a xenon lamp, and nanoscale electron beams. Magnetron sputtering was selected as the precursor deposition technique due to the large area capability coupled with low processing temperatures, allowing deposition directly on polymer substrates. Furthermore, modulation of the energy flux to the growing film during magnetron sputtering (by controlling the flux of incident energetic particles) provided an opportunity to control the density of pre-existing nuclei in the amorphous material for an added measure of structural control upon illumination. The structure, composition and optical properties of crystalline 2D TMD materials on flexible and rigid substrates after illumination, were then correlated to the pre-existing amorphous structure and process conditions for selected TMD compositions. Important conclusions from the work include significant insight on the mechanisms of crystallization kinetics, as well as new correlations of structure to optical properties, including a dependence on photoluminescence intensity accompanied by a change in crystal edge density, correlating well to theory. In summary, this work employs various crystallization techniques to understand nucleation and growth of 2D TMD materials, and application of nucleation and growth mechanisms to control optical properties.

Download or read book Women in Aerospace Materials written by Mary E. Kinsella and published by Springer Nature. This book was released on 2020-05-20 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides insight into research and development of key aerospace materials that have enabled some of the most exciting air and space technologies in recent years. The stories are shared with you by the women who experienced them, those engineers and scientists in the labs, on the shop floors, or on the design teams contributing to the realization of these technologies. Their work contributes to the world in the challenging and vital field of aerospace materials, and their stories seethe with a pride and a passion for the opportunity to make these important contributions. As an important part of the Women in Science and Engineering book series, the work highlights the contribution of women leaders in Aerospace Materials, inspiring women and men, girls and boys to enter and apply themselves to secure our future in an increasingly connected world.

Download or read book Advances in Thin Film Fabrication by Magnetron Sputtering written by Rafal Chodun‬ and published by . This book was released on 2024-03-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetron sputtering technology is one of the most popular PVD methods used in the industry. Its importance is predicted to increase due to the current developments in research centers engaged in that particular domain. Developments are due to the modifications introduced into the sputtering technology itself (e.g., the use of innovative plasma sources, innovative technical means for influencing the state of the magnetron plasma, innovative approaches to the plasma's state and its control) and the production of new coating materials with functional properties that enable them to meet the needs of the modern industry. This reprint aims to present a collection of ideas describing recent advances in thin-film manufacturing technology, focusing on the influence of magnetron sputtering modification on the film synthesis conditions, parameters, and properties of the films that are produced.

Download or read book Synthesis and Properties of Epitaxial Thin Films of Pr 2 Ir 2 O 7 and Mn 3 XN X written by Lu Guo and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frustrated antiferromagnetic (AFM) systems exhibit a strong correlation between the lattice, spin, and charge. Extensive studies have been performed to understand frustrated AFMs in bulk. However, studies on frustrated AFM thin films are limited due to challenges in the growth of high-quality samples. Due to a large number of energy degenerate spin states, frustrated AFM configurations are sensitive to external perturbations such as strain, structural defects or chemical disordering. Thus, epitaxial AFM thin films are the prerequisites for understanding the intrinsic magnetic properties and ground states of the spin configurations of the antiferromagnetic systems. In this work, pyrochlore Pr2Ir2O7 and Mn-based antiperovskite epitaxial thin films are chosen for study as prototypical 3D and 2D frustrated AFM systems. To address the synthetic challenges of epitaxial Pr2Ir2O7 thin films, we combine thermodynamic analysis of the Pr-Ir-O2 system with experimental results from the conventional physical vapor deposition (PVD) technique of co-sputtering. Thermodynamic calculations indicate that high deposition temperatures and high partial pressures of gas species O2(g) and IrO3(g) are required to stabilize Pr2Ir2O7. Furthermore, we find that the gas species partial pressure requirements are beyond those achievable by any conventional PVD technique. Instead, we were able to synthesize weberite-like structure pure-phase Pr3IrO7 thin films on the (111) YSZ substrates by magnetron sputtering in situ. Thus, we suggest high-pressure techniques, in particular chemical vapor deposition (CVD), as a route to the synthesis of Pr2Ir2O7, as they can support thin film deposition under the high pressure needed for in situ stabilization of pyrochlore Pr2Ir2O7. As an alternative approach, we have successfully grown epitaxial pyrochlore Pr2Ir2O7 thin films on (111) oriented yttrium stabilized zirconia (YSZ) single crystal substrates via solid phase epitaxy (SPE). While bulk Pr2Ir2O7 shows a spontaneous hysteretic Hall effect below 1.5 K, we observed the effect at elevated temperatures up to 15 K in epitaxial thin films. We conclude that the elevated-temperature spontaneous Hall effect is caused by a topological effect originating either from the Ir or Pr sublattice, with interaction strength enhanced by the Ir local moments. We have also grown high quality epitaxial thin films of the 2D frustrated AFM system Mn3XN (X=Ga and Ni) in situ by reactive magnetron sputtering with high pressure RHHED. We have characterized the thin films by x-ray diffraction measurements, Hall measurements, and magnetization measurements to investigate the strong lattice-spin-electron correlation. The high-quality Pr2Ir2O7 and Mn3XN (X=Ga and Ni) epitaxial thin films and heterostructures will provide a fertile platform for strain engineering, heterostructure design, and artificial structure design for probing and manipulating AFM spin configurations and developing spintronic device applications.

Download or read book Synthesis of Silver diamond Like Carbon Thin Films by Magnetron Sputtering written by Venkatesh Majji and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Diamond-like carbon thin films are been used in wide range of applications due to their attractive tribological properties. Metal-doped DLC films have significant properties which make them compatible to use in larger variety of applications. The present study examines the dispersion and their effect on various tribological properties when Ag is incorporated into the DLC thin films. These Ag-DLC nanocomposite films were synthesized by a hybrid CVD and magnetron sputtering process in a discharge composed of CH4, and Ar atmosphere. These DLC and Ag-DLC films were characterized by Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy. Tribological tests were carried out to measure the frictional and wear behavior of the Ag-DLC films as a function of Ag content. The TEM cross sectional studies revealed that Ag is present as Ag nanoparticles that were distributed uniformly throughout an amorphous DLC matrix. XPS analysis confirmed that Ag in the nanoparticles was present in the metallic form. Increasing the Ag content in the film, reduced its sp3 content. The incorporation of these nanoparticles causes a reduction in hardness in Ag-DLC when compared with pure DLC films. Microhardness of DLC films exhibits values up to a maximum of 16 GPa and gradually decreases with increasing in Ag content. FTIR and Raman studies confirmed that the films contain a significant amount of hydrogen, and with an increase in the Ag content in the DLC film results in an increase in sp2 carbon content. Finally, the friction behavior of the Ag-DLC films showed a comparable performance with that of DLC films with a coefficient of friction as low as 0.1. The DLC films exhibited a lower wear rate of 5.51x10−8 mm3/Nm than Ag-DLC films. The wear rate in the Ag-DLC films gradually increased with increasing Ag content but it remained at low levels (i.e., up to 1.7x10−7 mm3/Nm). This is consistent with the higher sp2 content of the Ag-DLC films.

Download or read book Synthesis of Bismuth Based Thin Films and Nanoparticles by Reactive Magnetron Sputtering for Photocatalytic Applications written by Sara Ibrahim and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis emerged as an inexpensive and environment-friendly process for the degradation of dye pollutants, the photocatalytic reduction of CO2, and water splitting. In this work, the main objective is to synthesize novel heterojunction photocatalysts of high activity and stability by the one-pot synthesis, reactive magnetron sputtering technique. For this purpose, we have chosen bismuth-based materials, which have recently emerged as promising new candidates for UV and visible light-responsive photocatalysts. Bismuth oxide and bismuth oxyfluoride films are deposited by sputtering a bismuth target in Ar/O2 and Ar/O2/CF4 atmospheres, respectively. To determine the target state and identify the sputtering regimes, the different plasmas are investigated by optical emission spectroscopy. Depending on these regimes, different kinds of semiconductors (individual or in heterojunction) are deposited. We focus our study on Bio/Bi2O3 and Bio/BiO0.5F2 heterojunctions, in which the controlled Bi° content leads to better charge separation and so an improved photocatalytic performance in the photodegradation of methyl orange dye and the photoconversion of CO2. Then, to increase the photocatalyst specific surface, spherical nanoparticles with a diameter

Download or read book Synthesis and Characterization of 2D TMDs Thin Films flakes by Various Solution Processed Deposition Methods for Different Applications written by Talha Nisar and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MXene Based Photocatalysts written by Zuzeng Qin and published by CRC Press. This book was released on 2022-02-20 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: MXene, a two-dimensional (2D) transition metal carbide, nitride, and carbonitride, was discovered in 2011. MXene has great potential as a cocatalyst in the field of photocatalysis due to its unique properties and structure. MXene-Based Photocatalysts: Fabrication and Applications introduces readers to the fundamentals, preparation, microstructure characterization, and a variety of applications of MXene-based photocatalysts. The book is a comprehensive reference for MXene materials and provides an overview of the current literature on MXene-based photocatalysts. FEATURES Discusses preparation methods of MXenes Describes the morphology and microstructure of MXenes Offers strategies for fabricating MXene-based photocatalysts Details the reaction mechanism of MXene-based photocatalysts Covers applications in photocatalytic water-splitting, photocatalytic CO2 reduction, photocatalytic degradation, photocatalytic nitrogen fixation, and photocatalytic H2O2 production This book serves as an invaluable guide for advanced students, industry professionals, professors, and researchers in the field of materials science and engineering, photocatalysis, energy, and environmental applications.

Download or read book Hexagonal Boron Nitride written by Kalim Deshmukh and published by Elsevier. This book was released on 2024-05-31 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hexagonal Boron Nitride: Synthesis, Properties, and Applications offers a comprehensive approach to hexagonal boron nitride (h-BN), covering synthesis, exfoliation, properties, characterization, functionalization, heterostructures, nanocomposites, and modelling and simulation, and guiding the reader towards advanced applications in biomedicine, electronics, energy storage, wastewater treatment, and other areas.The book begins by introducing hexagonal boron nitride, discussing classification, structure, synthesis methods, exfoliation, and functionalization techniques. This is followed by in-depth coverage of properties and characterization, as well as heterostructures and other two-dimensional materials, as well as nanocomposites. The fourth section of the book examines specific target applications, covering a range of cutting-edge areas including micro- and nano-electronics, anti-friction and anti-corrosive coatings, bone tissue engineering, wound healing, nanomedicine, drug delivery, catalysis, water treatment, energy storage and conversion, sensing and bio-sensing, and fire-retardant applications. Finally, computational modelling and simulation, and environmental aspects, are addressed in detail.This is a valuable resource for researchers and advanced students across nanotechnology, materials science, chemistry, environmental science, chemical engineering, biomedicine, electronics, and engineering. In an industrial setting, this book supports scientists, engineers, and R&D professionals with an interest in advanced 2D materials or nanomaterials for advanced applications. - Presents the synthesis, properties, functionalization, and characterization methods for hexagonal boron nitride - Explores novel applications across biomedicine, electronics, energy storage, and water treatment - Addresses key challenges, such as biocompatibility, toxicity, and environmental and health impact