Synthesis And Application Of Lanthanide Doped Materials

Proceedings of the April-May 1995 symposium explore these materials, the use of which provides enhanced optical performance in such fields as information display, telecommunications, integrated optics, and radiation detection. Topics include fundamental materials issues, emissive materials and activ

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

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.

This second edition of Nanocrystalline Materials provides updated information on the development and experimental work on the synthesis, properties, and applications of nanocrystalline materials. Nanocrystalline materials with new functionalities show great promise for use in industrial applications — such as reinforcing fillers in novel polymer composites — and substantial progress has been made in the past decade in their synthesis and processing. This book focuses primarily on 1D semiconducting oxides and carbon nanotubes, 2D graphene sheets and 0D nanoparticles (metals and inorganic semiconductors). These materials are synthesized under different compositions, shapes and structures, exhibiting different chemical, physical and mechanical properties from their bulk counterparts. This second edition presents new topics relevant to the fast-paced development of nanoscience and nanotechnology, including the synthesis and application of nanomaterials for drug delivery, energy, printed flash memory, and luminescent materials. With contributions from leading experts, this book describes the fundamental theories and concepts that illustrate the complexity of developing novel nanocrystalline materials, and reviews current knowledge in the synthesis, microstructural characterization, physical and mechanical behavior, and application of nanomaterials. Investigates the synthesis, characterization, and properties of a large variety of nanocrystalline materials, and their applications in industry Keeps the prominent challenges in nanomaterials fabrication at the forefront while offering the most up-to-date scientific findings Written by experts in nanomaterials with academic backgrounds in chemistry, physics, and materials engineering

Upconverting Nanomaterials: Perspectives, Synthesis, and Applications serves as a powerful instrument that explores cutting-edge research knowledge on the topic of upconverting nanosystems, while simultaneously providing the necessary fundamental background for nonspecialist readers. The various aspects of upconverting materials are approached both from a theoretical point of view, particularly upconverting phenomenon, and a practical one. By presenting synthetic strategies, functionalization, production of core shell structures and nanocomposites, this book supplies PhD students, researchers, and scientists with a wealth of ideas they can apply to different fields of research. Thirty-five renowned scientists from around the world have collaborated to produce 11 chapters that help to "make a voyage" through the most important aspects of UPNPs, including syntheses, mechanism, functionalization, and applications.

Lanthanide Doped Aluminate Phosphors: Synthesis, Properties, and Applications overviews advances in research on aluminate-based long persistent phosphors and their applications in lighting, display, radiation dosimetry and imaging. The book reviews the most important categories of rare earth aluminate-based phosphors, including aluminosilicates and aluminoborates. This category of material is attractive for a wide range of applications because of their high quantum efficiency, long afterglow life, chemical stability and optical properties, which is discussed throughout. Optical properties, in particular, are emphasized in the book along with the relationship of the chemical composition and doping of these materials and their optical performance. This book is suitable for researchers and practitioners working in academia and research and development in industry in the disciplines of materials science and engineering, chemistry and physics. Introduces rare-earth doped aluminates synthesis and characterization strategies, properties and applications Focuses on different types of aluminates, such as monoaluminates, binary aluminates and hexaaluminates, aluminoborates and aluminosilicate systems Discusses optical properties of phosphors, including photoluminescent long persistence and thermo luminescence

In the past two decades it has been widely demonstrated that the optical properties of select inorganic materials may be modified by changing either their size or shape on the nanometer level (sub-nanometer to 100 nm length scale). Much of the early research on this topic focused on semiconducting nanocrystals, where it has been effectively demonstrated that reducing particle size below their Bohr radius produced a characteristic blue shift of the band gap absorption. A little over a decade after the initial work on semiconducting nanocrystals, the first scientific articles on insulating nanocrystals doped with lanthanide ions started to appear. While numerous studies have focused on examining the luminescence generated by exciting with ultraviolet (UV) light, very few have examined the upconversion phenomenon in nanocrystalline materials. Upconversion is the generation of higher energy light from lower energy radiation typically through the use of lanthanide ions doped into a solid state host. Much of the interest in upconverting nanocrystalline materials is due to their prospective application as fluorescent biological labels. In this thesis the synthesis, spectroscopic, and upconversion properties of lanthanide-doped nanocrystalline materials will be discussed. We report on our efforts to date to achieve viable upconversion luminescence from Ho 3+ doped nanocrystalline Y 2 O 3 and Gd 3 Ga 5 O 12 prepared via the combustion synthesis. These studies have determined that, while upconversion occurs in Y 2 O 3 bulk samples, it is severely reduced or nonexistent in the nanocrystal samples. This behaviour is attributed to the presence of high vibrational energies, 1500 and 3350 cm -1, due to adsorbed atmospheric CO 3 2- and OH - anions, respectively, on the surface of the nanocrystals. A substantial increase in the upconversion efficiencies was observed in the case of the garnet (Gd 3 Ga 5 O 12) nanocrystals due to considerably less surface contamination. The effect of Yb 3+ Co-doping on the upconversion luminescence in the Gd 3 Ga 5 O 12 sample will also be introduced. We also evaluate the spectroscopic properties of lutetium oxide nanocrystals doped with trivalent europium (Lu 2 O 3 :Eu 3+) prepared by the same combustion synthesis technique. These results are compared and contrasted to those of a bulk Lu 2 O 3 :Eu 3+ sample. In the case of Lu 2 O 3 we observe significant changes in the luminescence behaviour that we attribute to the vastly different particle sizes of the two different materials. Finally, we present a new procedure for synthesizing NaYF 4 :Er 3+, Yb 3+ nanoparticles that are capable of colloidal dispersion in non-polar organic solvents. The highly luminescent nanoparticles are synthesized via the thermal decomposition of trifluoroacetate precusors in a mixture of oleic acid and octadecene. The Er 3+, Yb 3+ and Tm 3+, Yb 3+ doped cubic NaYF 4 nanocrystals exhibit green/red and blue upconversion luminescence, respectively under 980 nm laser excitation with low power densities while colloidally dispersed. A brief discussion on our current attempts and future efforts towards modifying the nanoparticles surface will also be given.