Spectroscopy Of Lanthanide Doped Oxide Materials

Author : Sanjay J. Dhoble
Publisher : Woodhead Publishing
ISBN 13 : 0081029365
Total Pages : 480 pages
Book Rating : 4.67/5 ( download)

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Download or read book Spectroscopy of Lanthanide Doped Oxide Materials written by Sanjay J. Dhoble and published by Woodhead Publishing. This book was released on 2019-10-30 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectroscopy of Lanthanide Doped Oxide Materials provides a comprehensive overview on the most essential characterization techniques of these materials, along with their key applications. The book describes the application of optical spectroscopy of lanthanides doped inorganic phosphor hosts and gives information about their structure and morphology, binding energies, energy of transition and band gap. Also discussed are the properties and applications of rare earth doped inorganic materials and the barriers and potential solutions to enable the commercial realization of phosphors in important applications. The book reviews key information for those entering the field of phosphor research, along with the fundamental knowledge of the properties of transition series elements under UV/Visible/NIR light exposer. Low-cost materials methods to synthesize the materials and spectroscopic characterization methods are also detailed. Reviews the barriers and potential solutions to enable commercial realization of inorganic phosphors Discusses low-cost material methods to synthesize and characterize lanthanide doped oxide materials Provides readers with a comprehensive overview on key properties for the most relevant applications, such as lighting and display, energy conversion and solar cell devices

Author : Kadathala Linganna
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.36/5 ( download)

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Download or read book Luminescence Spectroscopy of Lanthanides written by Kadathala Linganna and published by . This book was released on 2013 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Matthew Charles Ellis
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.64/5 ( download)

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Download or read book Understanding Magnetic and Optical Properties of Lanthanide-Doped Oxide Nanospinels and Heterometallic Formate Metal-Organic Frameworks written by Matthew Charles Ellis and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation is composed into two primary portions defined by the material types investigated. The first part is concerned with the magneto- and thermo-optical properties of trivalent lanthanide-doped metal-oxides using europium as a probe of the photophysical mechanisms in play. These works offer important insight to observed properties that have not previously been understood and will allow for more directed studies for the use of such materials in commercial applications. The second part is concerned with the synthesis and magnetic properties of novel hetermetallic perovskite-like metal-organic frameworks, providing a route to tune the multiferroic behavior through variations in the composition of the two metals involved. In the first part of this dissertation the magneto- and thermo-optical properties of known nanospinels (AB2X4), zinc aluminate and zinc gallate, and analogous ß-gallium oxide nanoparticles doped with trivalent europium are studied using optical spectroscopy methodologies under applied high magnetic field and extreme temperature conditions. Lanthanide photophysics have been studied in depth for many decades due to their narrow line-like absorption and emission lines, despite being parity forbidden transitions. Lanthanides differ considerably from transition metal emitters in that the characteristics which lift the degeneracy in energy states are very different, resulting in many differences in the photophysical properties of materials containing those atoms. Lanthanides, however, differ from other common emitters in other ways, particularly in their relative quantum efficiencies and quantum yields. Due to the aforementioned parity forbidden nature of trivalent lanthanide excitation the quantum yields are very low due to poor absorption, despite very high quantum efficiencies. Research into materials containing lanthanides has continued to increase recently as methods of circumventing the poor absorption have increased quantum yields significantly and paved the way for commercial applications in solid-state lighting. In the last twelve years there has been additional interest in understanding the effects of temperature and applied magnetic field on lanthanide containing materials. Theoretical predictions have been made to explain observations made at moderately low temperatures (∼77 K) but experimental confirmation through a wide range of host materials and methods is limited. Studies of various metal-oxide hosts ranging from the nano- to bulk size regimes have been undertaken under applied high magnetic field using pulsed magnet systems. These studies have made a range of observations, including significant emission quenching, hysteresis-like behavior in emission recovery, and small shifts and changes in Stark splitting patterns as a function of applied magnetic field. There has been very little proposed to explain the mechanism that leads to emission quenching and hysteresis-like behavior (bistability), but the minute changes in Stark patterns and peak positions has been proposed to be the result of Zeeman splitting effects and changes in the local symmetry of the lanthanide ion. Lanthanides have also made an increased appearance in magnetic applica- tions as single-molecule magnets, most notably europium oxide, due to the unique behaviors of lanthanides under an applied magnetic field. This has widened the field of potential applications to include quantum computing and other spinelectronic applications. In this work a series of analogous metal-oxide nanoparticles are doped with trivalent europium and probed using optical spectroscopy at extreme temperatures as low as 4.2 K and, for the first time, in a persistent field magnet at high applied field. Using established theory the Zeeman splitting effects will be calculated to predict any relative shifts in Stark peak positions. Additionally, accepted theory will be used to verify that changes in Stark splitting patterns are likely due to Zee- man splitting alone, and not changes in local symmetry, as this splitting can lead to the separation of energy levels such that J-level mixing is reduced in at least one level and a secondary emission line exists. A simple mechanism is also proposed that functionally explains the emission quenching and bistabilities observed in recovery that is supported by thermo-optical data and a previously proposed model for temperature behavior in lanthanides based on Mott-Seitz theory. By using analogous hosts as controls it has been determined that the observed properties are due, not just to the field effects on lanthanide ions, but a combination of lanthanide properties and those of the host material. In fact, while the extremely limited tuning potential of lanthanide energy states are extremely important in facilitating the observed behaviors, their nature prohibits them from being useful in tuning them. Thus it has been concluded that the ability to manipulate these properties is primarily dependent on changes to the composition and structure of the host. In the second part of this dissertation a range of metal-metal ratios in a hetermetallic perovskite-like metal-organic framework is synthesized and probed to study the relationships between metal composition and magnetic properties. Since multiferroic behavior was first reported in metal-organic framework materials the field has grown considerably, with the past ten years seeing an explosion of studies to better understand the nature of these materials and the various ways these properties can be manipulated. This field has predominantly focused on homometallic ABX3 perovskite-like metal-organic frameworks and the tuning of these materials through structural manipulation via substitutions of the three ions (A, B and X). More recent studies have focused on tuning through changes in particle size and limited studies on heterometallic structures, typically with 50/50 metal ratios, on a handful of transition metal combinations. The investigation of the effects of particle size have also led to new synthetic routes, including microwave-assisted synthesis, which provide size control, substantially reduce the time of synthesis, and increase energy efficiency while lowering the environmental impact. This work relies on traditional solvothermal synthesis methods to investigate a range of metal-metal ratios in dimethylammonium nickelx manganese1-x formate metal-organic framework materials and their relative magnetic and electrical properties. Several relationships between these properties and the metal composition have been identified in addition to crystal growth size. It is also reported that the combination of metals, in which one is known to be multiferroic and the other is not, can and, in this case, will result in a hybrid material that maintains the desired multiferroic behavior. This dissertation seeks to broadly increase the understanding of various magnetic and electronic properties and relationships to structure in materials with significant promise in important fields and allow for more efficiently directed research in technical applications. Chapter 1 provides a thorough background and introduction to the theories and ideas used throughout this dissertation. In the first half an introduction to conventional lanthanide pho- tophysics provides an understanding of the unique nature of lanthanides relative to organic and transition metal emitters that in part leads to the difficulties of understanding the magnetic and thermal properties. A brief introduction is also provided to provide context for the analogous hosts used in this work which have allowed preliminary examination of the effects of manipulating various sites in the lattice. The second half of chapter 1 describes metal-organic frameworks and introduces the concept of multiferroics and provides an understanding of the significance of such materials. Chapter 2 provides introductions to the various methodologies used throughout this dissertation to probe the properties of various methods. Chapters 3 and 4 describe the synthetic methods and primary experimental results and discus- sion obtained through the study of trivalent europium doped at 5% in zinc aluminate, zinc gallate, and ß-gallium oxide nanoparticles under applied high magnetic field and extreme temperature conditions respectively. Chapters 5 and 6 are concerned with the synthetic methods and structural, magnetic, and dielectric properties of dimethylammonium nickelx manganese1-x formate metal-organic framework single crystals and the relationships that relate many of these properties. Chapter 7 provides a summary of the most significant results of the prior chapters and a direction for future work to better understand and further validate the ideas proposed by this dissertation.

Author : Visakh P. M.
Publisher : John Wiley & Sons
ISBN 13 : 3527824235
Total Pages : 389 pages
Book Rating : 4.36/5 ( download)

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Download or read book Nanotechnology in Electronics written by Visakh P. M. and published by John Wiley & Sons. This book was released on 2022-10-07 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology in Electronics Enables readers to understand and apply state-of-the-art concepts surrounding modern nanotechnology in electronics Nanotechnology in Electronics summarizes numerous research accomplishments in the field, covering novel materials for electronic applications (such as graphene, nanowires, and carbon nanotubes) and modern nanoelectronic devices (such as biosensors, optoelectronic devices, flexible electronics, nanoscale batteries, and nanogenerators) that are used in many different fields (such as sensor technology, energy generation, data storage and biomedicine). Edited by four highly qualified researchers and professionals in the field, other specific sample topics covered in Nanotechnology in Electronics include: Graphene-based nanoelectronics biosensors, including the history, properties, and fundamentals of graphene, plus fundamentals of graphene derivatives and the synthesis of graphene Zinc oxide piezoelectronic nanogenerators for low frequency applications, with an introduction to zinc oxide and zinc oxide piezoelectric nanogenerators Investigation of the hot junctionless mosfets, including an overview of the junctionless paradigm and a simulation framework of the hot carrier degradation Conductive nanomaterials for printed/flexible electronics application and metal oxide semiconductors for non-invasive diagnosis of breast cancer The fundamental aspects and applications of multiferroic-based spintronic devices and quartz tuning fork based nanosensors. Containing in-depth information on the topic and written intentionally to help with the practical application of concepts described within, Nanotechnology in Electronics is a must-have reference for materials scientists, electronics engineers, and engineering scientists who wish to understand and harness the state of the art in the field.

Author : Mikhail G. Brik
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110607875
Total Pages : 314 pages
Book Rating : 4.71/5 ( download)

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Download or read book Luminescent Materials written by Mikhail G. Brik and published by Walter de Gruyter GmbH & Co KG. This book was released on 2023-03-06 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an overview on the fundamentals and recent developments in the field of luminescent materials. Starting from the definitions and properties of phosphors, novel application areas as well as spectroscopic methods for characterization will be described. The reader will benefit from the vast knowledge of the authors with backgrounds in industry as well as academia.

Author : Raghumani S. Ningthoujam
Publisher : Springer Nature
ISBN 13 : 9819971454
Total Pages : 759 pages
Book Rating : 4.59/5 ( download)

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Download or read book Handbook of Materials Science, Volume 1 written by Raghumani S. Ningthoujam and published by Springer Nature. This book was released on 2023-11-21 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art coverage of optical materials and their application in various areas. The contents range from basic principles to quantum cutting luminescent materials, advances in plasmonic and photonic substrate-coupled fluorescence, lanthanide doped materials for optical applications, thermoluminescence and optical material for sensing radioactive elements. It also discusses synthesis, characterization and properties of optical materials including nanomaterials, luminescent nanomaterials for anti-counterfeiting, carbon materials-based nanoscale optics and plasmonics, optoelectronics applications of two dimensional materials and applications of lanthanide ion-doped phosphors. This book is of immense value to those in academia and industry working in the areas of material science, especially optical materials.

Author : Arpan Kumar Nayak
Publisher : Elsevier
ISBN 13 : 0128230509
Total Pages : 638 pages
Book Rating : 4.03/5 ( download)

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Download or read book Nanostructured Materials for Visible Light Photocatalysis written by Arpan Kumar Nayak and published by Elsevier. This book was released on 2021-10-10 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured Materials for Visible Light Photocatalysis describes the various methods of synthesizing different classes of nanostructured materials that are used as photocatalysts for the degradation of organic hazardous dyes under visible light irradiation. The first three chapters include a general introduction, basic principles, mechanisms, and synthesis methods of nanomaterials for visible light photocatalysis. Recent advances in carbon, bismuth series, transition metal oxide and chalcogenides-based nanostructured materials for visible light photocatalysis are discussed. Later chapters describe the role of phosphides, nitrides, and rare earth-based nanostructured-based materials in visible light photocatalysis, as well as the characteristics, synthesis, and fabrication of photocatalysts. The role of doping, composites, defects, different facets, morphology of nanostructured materials and green technology for efficient dye removal under visible-light irradiation are also explored. Other topics covered include large-scale production of nanostructured materials, the challenges in present photocatalytic research, the future scope of nanostructured materials regarding environmental hazard remediation under visible light, and solar light harvesting. This book is a valuable reference to researchers and enables them to learn more about designing advanced nanostructured materials for wastewater treatment and visible-light irradiation. Covers all the recent developments of nanostructured photocatalytic materials Provides a clear overview of the mechanism of visible light photocatalysis and the controlled synthesis of nanostructured materials Assesses the major challenges of creating visible light photocatalysis systems at the nanoscale

Author : Vijay B. Pawade
Publisher : CRC Press
ISBN 13 : 1000073165
Total Pages : 338 pages
Book Rating : 4.64/5 ( download)

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Download or read book Multifunctional Nanostructured Metal Oxides for Energy Harvesting and Storage Devices written by Vijay B. Pawade and published by CRC Press. This book was released on 2020-05-21 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal oxide nanoparticles exhibit potential applications in energy and environmental fields, such as solar cells, fuel cells, hydrogen energy, and energy storage devices. This book covers all points from synthesis, properties, and applications of transition metal oxide nanoparticle materials in energy storage and conversion devices. Aimed at graduate-level students and researchers associated with the energy and environment sector, this book addresses the application of nontoxic and environmentally friendly metal oxide materials for a clean environment and deals with synthesis properties and application metal oxides materials for energy conversion, energy storage, and hydrogen generation.

Author : Naveen Kumar
Publisher : Elsevier
ISBN 13 : 0323860176
Total Pages : 610 pages
Book Rating : 4.78/5 ( download)

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Download or read book Metal Oxide-Based Heterostructures written by Naveen Kumar and published by Elsevier. This book was released on 2022-11-13 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide–Based Heterostructures: Fabrication and Applications provides information on synthesis strategies, structural and hierarchical features, morphological characteristics of metal oxide–based heterostructures, and their diverse applications. This book begins with an introduction to the various multidimensional heterostructures, synthesis aspects, and techniques used to control the formation of heterostructures. Then, the impact of synthesis routes on the formation of mixed metal oxide heterostructures and their properties are analyzed. The effect of nonmetal doping, metal doping, and composites of metal oxide heterostructures on the properties of heterostructures is also addressed and that also includes opportunities for optimization of the material’s performance for specific applications. Special attention is given to the surface characteristics of the metal oxide heterostructures and their impact on the material’s performance, and the applications of metal oxide heterostructures in various fields such as environmental remediation, sensing, organic catalysis, photovoltaics, light emitting materials, and hydrogen production. Introduces key principles for metal oxide heterostructures, their properties, key characteristics, and synthesis routes Emphasizes the relationship between synthesis strategies and material performance, including optimization strategies such as tailoring the material’s surface characteristics or structure Discusses metal oxide heterostructures and their application in lighting and displays, energy, environment, and sensing

Author : Xueyuan Chen
Publisher : Springer Science & Business Media
ISBN 13 : 3642403646
Total Pages : 217 pages
Book Rating : 4.44/5 ( download)

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Download or read book Lanthanide-Doped Luminescent Nanomaterials written by Xueyuan Chen and published by Springer Science & Business Media. This book was released on 2013-11-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lanthanide-Doped Luminescent Nanomaterials reviews the latest advances in the development of lanthanide-doped luminescent inorganic nanoparticles for potential bioapplications. This book covers the chemical and physical fundamentals of these nanoparticles, such as the controlled synthesis methodology, surface modification chemistry, optical physics, and their promising applications in diverse bioassays, with an emphasis on heterogeneous and homogeneous in-vitro biodetection of tumor biomarkers. This book is intended for those readers who are interested in systematically understanding the materials design strategy, optical behavior of lanthanide ions, and practical bioapplications of lanthanide nanoparticles. It primarily focuses on the interdisciplinary frontiers in chemistry, physics and biological aspects of luminescent nanomaterials. All chapters were written by scientists active in this field and for a broad audience, providing both beginners and advanced researchers with comprehensive information on the subject. Xueyuan Chen is a Professor at Fujian Institute of Research on the Structure of Matter (FJIRSM), Chinese Academy of Sciences. Yongsheng Liu is a Research Associate Professor at FJIRSM, Chinese Academy of Sciences. Datao Tu is a Research Assistant Professor at FJIRSM, Chinese Academy of Sciences.