A Nonhydrolytic Solution-phase Synthesis of Lithium Niobate Nanostructures PDF Download
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Author: Bryan D. Wood Publisher: ISBN: Category : Lithium niobate Languages : en Pages : 450
Book Description
A new soft chemical approach to synthesize nanoscale crystals of LiNbO3 has been developed. This technique was developed with the intention of producing a material for use as an optical probe in second harmonic generation microscopy. Nanocrystals of LiNbO3 were synthesized in
Author: Bryan D. Wood Publisher: ISBN: Category : Lithium niobate Languages : en Pages : 450
Book Description
A new soft chemical approach to synthesize nanoscale crystals of LiNbO3 has been developed. This technique was developed with the intention of producing a material for use as an optical probe in second harmonic generation microscopy. Nanocrystals of LiNbO3 were synthesized in
Author: Rana Faryad Ali Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Lithium niobate (LiNbO3) is a unique photonic material, often referred to as the "silicon of photonics", due to its excellent optical properties. In this thesis, we advanced the development of solution-phase approaches for the preparation of LiNbO3 nanoparticles (NPs) with an average, tunable size from 7 to 100 nm. This solution-phase process results in the formation of crystalline, uniform NPs of LiNbO3 at a reaction temperature of 220 °C with an optimal reaction time as short as 30 h. Advantages of these methods include the preparation of single-crystalline LiNbO3 NPs without the need for further heat treatment or without the need for using an inert reaction atmosphere. The growth of these nanoparticles began with a controlled agglomeration of nuclei formed during a solvolysis step. The reactions subsequently underwent the processes of condensation, aggregation, and Ostwald ripening, which remained the dominant process during further growth of the nanoparticles. These processes did produce single-crystalline nanoparticles of LiNbO3, suggesting an oriented attachment process. Average dimensions of the NPs were tuned from 7 to ~100 nm by either increasing the reaction time or changing the concentration of the lithium salts used in the solvothermal process. The nanoparticles were also confirmed to be optically active for SHG. These NPs could enable further development of SHG based microscopy techniques. In this thesis, we also performed a comparative study on the role of different Li precursors during the synthesis of LiNbO3 NPs. The results of these studies suggest that the type of Li precursor selected plays an important role in nanoparticle formation, such as through controlling the uniformity, crystallinity, and aggregation of LiNbO3 NPs. The average diameter of the resulting NPs can also vary from ~30 to ~830 nm as a function of the Li reagent used in the synthesis. The selection of Li precursors also influences the phase purity of the products. Nanoparticles of LiNbO3 are explored in literature as SHG bioimaging probes for their potential to expand underdeveloped SHG based microscopy techniques. The efficient use of SHG active LiNbO3 NPs as probes does, however, require their surface functionalization with polyethylene glycol and fluorescent molecules to enhance their colloidal stability, chemical stability, and to enable a correlative imaging platform. This surface functionalization approach used functional alcohols to serve as a platform for attaching a variety of reagents, including nonreactive surface coatings (e.g., polyethylene glycol). As a demonstration of this approach to utilizing the surface chemistry derived from the silanol-alcohol condensation reaction, the surfaces of the NPs were covalently functionalized with biologically important molecules such as polyethylene glycol and a fluorescent probe. This strategy in tuning the surface chemistry of the nanoparticles based on covalent bonding to their surfaces reduced aggregation of the NPs, provided chemical stability and enabled a multimodal tracking platform for SHG nanoprobes. We also developed the first porous and monodisperse LiNbO3 NPs that were also verified to be SHG active, which could be used as contrast agents in nonlinear optical microscopy, optical limiters, biosensors, and photocatalysts. The porous nonlinear optical material can also enhance the SHG response by loading the pores with organic guest molecules (e.g., carboxylic acids, anilines). We introduce a hydrothermal method to prepare monodisperse and mesoporous LiNbO3 NPs for enhanced SHG response. This approach forms mesoporous LiNbO3 NPs with diameters of ~600 nm without additional organic additives (e.g., surfactants) to control growth and aggregation of the nanoparticles. The mesopores of the LiNbO3 NPs were loaded with organic molecules such as tartrates that offer better photochemical stability and more acentric molecular alignment to the host material. The loading of tartrate anions onto the surfaces of these nanoparticles provides enrichment of pi-electrons to LiNbO3, which enhances the SHG response of mesoporous LiNbO3 by 4 times.
Author: Markus Niederberger Publisher: Springer Science & Business Media ISBN: 1848826710 Category : Science Languages : en Pages : 223
Book Description
Metal Oxide Nanoparticles in Organic Solvents discusses recent advances in the chemistry involved for the controlled synthesis and assembly of metal oxide nanoparticles, the characterizations required by such nanoobjects, and their size and shape depending properties. In the last few years, a valuable alternative to the well-known aqueous sol-gel processes was developed in the form of nonaqueous solution routes. Metal Oxide Nanoparticles in Organic Solvents reviews and compares surfactant- and solvent-controlled routes, as well as providing an overview of techniques for the characterization of metal oxide nanoparticles, crystallization pathways, the physical properties of metal oxide nanoparticles, their applications in diverse fields of technology, and their assembly into larger nano- and mesostructures. Researchers and postgraduates in the fields of nanomaterials and sol-gel chemistry will appreciate this book’s informative approach to chemical formation mechanisms in relation to metal oxides.
Author: Publisher: Academic Press ISBN: 0123743966 Category : Science Languages : en Pages : 2785
Book Description
From the Introduction: Nanotechnology and its underpinning sciences are progressing with unprecedented rapidity. With technical advances in a variety of nanoscale fabrication and manipulation technologies, the whole topical area is maturing into a vibrant field that is generating new scientific research and a burgeoning range of commercial applications, with an annual market already at the trillion dollar threshold. The means of fabricating and controlling matter on the nanoscale afford striking and unprecedented opportunities to exploit a variety of exotic phenomena such as quantum, nanophotonic and nanoelectromechanical effects. Moreover, researchers are elucidating new perspectives on the electronic and optical properties of matter because of the way that nanoscale materials bridge the disparate theories describing molecules and bulk matter. Surface phenomena also gain a greatly increased significance; even the well-known link between chemical reactivity and surface-to-volume ratio becomes a major determinant of physical properties, when it operates over nanoscale dimensions. Against this background, this comprehensive work is designed to address the need for a dynamic, authoritative and readily accessible source of information, capturing the full breadth of the subject. Its six volumes, covering a broad spectrum of disciplines including material sciences, chemistry, physics and life sciences, have been written and edited by an outstanding team of international experts. Addressing an extensive, cross-disciplinary audience, each chapter aims to cover key developments in a scholarly, readable and critical style, providing an indispensible first point of entry to the literature for scientists and technologists from interdisciplinary fields. The work focuses on the major classes of nanomaterials in terms of their synthesis, structure and applications, reviewing nanomaterials and their respective technologies in well-structured and comprehensive articles with extensive cross-references. It has been a constant surprise and delight to have found, amongst the rapidly escalating number who work in nanoscience and technology, so many highly esteemed authors willing to contribute. Sharing our anticipation of a major addition to the literature, they have also captured the excitement of the field itself in each carefully crafted chapter. Along with our painstaking and meticulous volume editors, full credit for the success of this enterprise must go to these individuals, together with our thanks for (largely) adhering to the given deadlines. Lastly, we record our sincere thanks and appreciation for the skills and professionalism of the numerous Elsevier staff who have been involved in this project, notably Fiona Geraghty, Megan Palmer and Greg Harris, and especially Donna De Weerd-Wilson who has steered it through from its inception. We have greatly enjoyed working with them all, as we have with each other.
Author: Nicola Pinna Publisher: John Wiley & Sons ISBN: 3527639926 Category : Technology & Engineering Languages : en Pages : 463
Book Description
Atomic layer deposition, formerly called atomic layer epitaxy, was developed in the 1970s to meet the needs of producing high-quality, large-area fl at displays with perfect structure and process controllability. Nowadays, creating nanomaterials and producing nanostructures with structural perfection is an important goal for many applications in nanotechnology. As ALD is one of the important techniques which offers good control over the surface structures created, it is more and more in the focus of scientists. The book is structured in such a way to fi t both the need of the expert reader (due to the systematic presentation of the results at the forefront of the technique and their applications) and the ones of students and newcomers to the fi eld (through the first part detailing the basic aspects of the technique). This book is a must-have for all Materials Scientists, Surface Chemists, Physicists, and Scientists in the Semiconductor Industry.
Author: Alain C. Pierre Publisher: Springer Nature ISBN: 3030381447 Category : Technology & Engineering Languages : en Pages : 716
Book Description
This book presents a broad, general introduction to the processing of Sol-Gel technologies. This updated volume serves as a general handbook for researchers and students entering the field. This new edition provides updates in fields that have undergone rapid developments, such as Ceramics, Catalysis, Chromatropgraphy, biomaterials, glass science, and optics. It provides a simple, compact resource that can also be used in graduate-level materials science courses.
Author: Daniela Nunes Publisher: Elsevier ISBN: 012811505X Category : Technology & Engineering Languages : en Pages : 331
Book Description
Metal Oxide Nanostructures: Synthesis, Properties and Applications covers the theoretical and experimental aspects related to design, synthesis, fabrication, processing, structural, morphological, optical and electronic properties on the topic. In addition, it reviews surface functionalization and hybrid materials, focusing on the advantages of these oxide nanostructures. The book concludes with the current and future prospective applications of these materials. Users will find a complete overview of all the important topics related to oxide nanostructures, from the physics of the materials, to its application. - Delves into hybrid structured metal oxides and their promising use in the next generation of electronic devices - Includes fundamental chapters on synthesis design and the properties of metal oxide nanostructures - Provides an in-depth overview of novel applications, including chromogenics, electronics and energy
Author: Alexander D. Pogrebnjak Publisher: Springer ISBN: 9811361339 Category : Technology & Engineering Languages : en Pages : 380
Book Description
This book highlights the latest advances in chemical and physical methods for thin-film deposition and surface engineering, including ion- and plasma-assisted processes, focusing on explaining the synthesis/processing–structure–properties relationship for a variety of thin-film systems. It covers topics such as advances in thin-film synthesis; new thin-film materials: diamond-like films, granular alloys, high-entropy alloys, oxynitrides, and intermetallic compounds; ultra-hard, wear- and oxidation-resistant and multifunctional coatings; superconducting, magnetic, semiconducting, and dielectric films; electrochemical and electroless depositions; thin-film characterization and instrumentation; and industrial applications.
Author: Bryan D. Wood
Author: Bryan D. Wood
Author: Rana Faryad Ali
Author: Markus Niederberger
Author: 
Author: DR MAXIM. SUMETS
Author: Nicola Pinna
Author: Alain C. Pierre
Author: Daniela Nunes
Author: Alexander D. Pogrebnjak
Author: