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Author : Martin O. King
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (937 download)
Download or read book Spectroscopy and Microscopy of Transition Metal Chalcogenide Nanomaterials written by Martin O. King and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zhenxi Dai
Publisher :
ISBN 13 :
Total Pages : 652 pages
Book Rating : 4.X/5 (2 download)
Download or read book Scanning Tunneling Microscopy and Spectroscopy Studies of Transition Metal Chalcogenides at 4.2K written by Zhenxi Dai and published by . This book was released on 1993 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Indrajit Sinha
Publisher : BoD – Books on Demand
ISBN 13 : 1789841593
Total Pages : 170 pages
Book Rating : 4.7/5 (898 download)
Download or read book Nanocatalysts written by Indrajit Sinha and published by BoD – Books on Demand. This book was released on 2019-07-31 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocatalysis is a topical area of research that has huge potential. It attempts to merge the advantages of heterogeneous and homogeneous catalysis. The collection of articles in this book treats the topics of specificity, activity, reusability, and stability of the catalyst and presents a compilation of articles that focuses on different aspects of these issues.
Author : Melissa Pressley Woodard
Publisher :
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.:/5 (111 download)
Download or read book Laser Synthesis and Spectroscopy of Ligand-coated Transition Metal Oxide Nanomaterials written by Melissa Pressley Woodard and published by . This book was released on 2019 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laser vaporization flow reactor (LVFR) has been utilized for the gas phase synthesis of ligand-coated nanomaterials. Exploration into the gas phase synthesis of ultra-small nanoclusters and nanoparticles can help scientists understand the differences in material structure and properties in the nanoscale compared to the bulk material. The structural, electronic, and vibrational properties of nanomaterials are studied by mass spectrometry, spectroscopy, electron microscopy and computational calculations. Transition metal oxides are of particular interest due to their applications in catalysis, fuel cells, magnetic storage, photovoltaics, and other electronic devices. Chromium oxide and molybdenum oxide were studied in these synthesis experiments. Ultra-small chromium oxide nanoclusters were obtained in solution with stoichiometries not typically observed in the bulk material. We find that the complex CrxOy(MeCN)z solution contains a mixture of cluster sizes and isomers making spectroscopic interpretation difficult. Molybdenum oxide nanorods were produced with a morphology unlike other molybdenum oxide nanorods made by more traditional synthetic methods. These nanorods are much smaller and have increased catalytic activity over other molybdenum oxide nanomaterials but have optical and electronic properties similar to those of other molybdenum oxide nanorods.
Author : Mohammad Mansoob Khan
Publisher : Elsevier
ISBN 13 : 0128209178
Total Pages : 378 pages
Book Rating : 4.1/5 (282 download)
Download or read book Chalcogenide-Based Nanomaterials as Photocatalysts written by Mohammad Mansoob Khan and published by Elsevier. This book was released on 2021-04-07 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chalcogenide-Based Nanomaterials as Photocatalysts deals with the different types of chalcogenide-based photocatalytic reactions, covering the fundamental concepts of photocatalytic reactions involving chalcogenides for a range of energy and environmental applications. Sections focus on nanostructure control, synthesis methods, activity enhancement strategies, environmental applications, and perspectives of chalcogenide-based nanomaterials. The book offers guidelines for designing new chalcogenide-based nanoscale photocatalysts at low cost and high efficiency for efficient utilization of solar energy in the areas of energy production and environment remediation. - Provides information on the development of novel chalcogenide-based nanomaterials - Outlines the fundamentals of chalcogenides-based photocatalysis - Includes techniques for heterogeneous catalysis based on chalcogenide-based nanomaterials
Author : Michelle Lim
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (93 download)
Download or read book Novel Route to Manufacturing Transition Metal Chalcogenide Nanomaterials written by Michelle Lim and published by . This book was released on 2013 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohammad Ehtisham Khan
Publisher : Elsevier
ISBN 13 : 0443188084
Total Pages : 283 pages
Book Rating : 4.4/5 (431 download)
Download or read book Metal-Chalcogenide Nanocomposites written by Mohammad Ehtisham Khan and published by Elsevier. This book was released on 2023-11-19 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-chalcogenides have exceptional properties and can be used for electronic devices, environmental monitoring, and sensing applications, for energy storage, as electrode materials, in fuel cells, membranes and for photocatalytic degradation of environmental pollutants in the field of waste-water treatment applications. Metal-Chalcogenide Nanocomposites: Fundamentals, Properties, and Industrial Applications focuses on metal chalcogenide nanomaterials for environmental remediation and corrosion applications. The chapters focuses on cost-effective and facile fabrication approaches, their growth mechanisms, optical, electrical, and other important properties and their applications in a broad range of diverse fields such as photocatalysis, photovoltaics, hydrogen production, lithium batteries, energy storage, anticorrosion, and sensor devices. The book will be an important information source for both material scientists and engineers who want to create the next generation of products and devices for energy and environmental applications. - Covers fabrication, standard characterization, photocatalytic mechanisms, and environmentally-sustainable fabrication methods - Applications covered include environmental, electronics, oil, gas, water treatment, sensing, and many more - Includes challenges and future opportunities, which are discussed in detail
Author : Trupthi Devaiah C
Publisher : Mohammed Abdul Sattar
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.2/5 (24 download)
Download or read book Metal Chalcogenide Nanomaterials written by Trupthi Devaiah C and published by Mohammed Abdul Sattar. This book was released on 2024-02-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemical elements oxygen (0), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po), belonging to group 16 of the periodic table, are called chalcogens. Chalcogenides are a class of chemical compounds consisting of at least one chalcogen anion and an electropositive element. When the electropositive element is a metal, it is called a 'metal chalcogenide.' Generally, the term chalcogenide is used to address sulfides, selenides, and tellurides rather than oxides and polonium compounds because of the strong non-metallic properties of oxygen and the strong metallic qualities of polonium. Due to the ability of the chalcogen to catenate and bind to numerous metal centers, various metal chalcogenides with different structures and compositions can be formed. The large and diverse family of metal chalcogenides can be classified in many ways; for instance, the chalcogen element present can be divided into sulfides, selenides, tellurides, and multi-chalcogen chalcogenides. Binary metal chalcogenides comprising a main group or transition metal and a chalcogen are widely explored for their distinctive chemical and physical properties and promising application in optoelectronics, photovoltaics, thermoelectrics, and photo-catalysis, and photodetection. Binary metal chalcogenides exist in many stoichiometries and structures.
Author : Suresh Sagadevan
Publisher : BoD – Books on Demand
ISBN 13 : 0854661859
Total Pages : 112 pages
Book Rating : 4.8/5 (546 download)
Download or read book Structural and Chemical Features of Chalcogenides written by Suresh Sagadevan and published by BoD – Books on Demand. This book was released on 2024-07-03 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigate the chalcogenides with this comprehensive consideration of their structural and chemical characteristics. This book provides a deep dive for researchers, material scientists, and inquisitive minds. • Explore the bonding patterns and atomic arrangements that define chalcogenides. • Unravel the unique crystal structures of various chalcogenide families, from layered wonders to complex networks. • Gain a thorough understanding of the factors governing chalcogenide formation and composition. • Have an impact on structural and chemical features by the electrical, optical, and other properties of chalcogenides. • Implement the vast applications of chalcogenides in fields ranging from photonics and electronics to energy storage and catalysis. • Learn the structural and chemical features of chalcogenides to provide a rich understanding of these versatile materials, positioning you to unlock their potential for groundbreaking advancements.
Author : Geon Dae Moon
Publisher : Springer
ISBN 13 : 3030039439
Total Pages : 97 pages
Book Rating : 4.0/5 (3 download)
Download or read book Anisotropic Metal Chalcogenide Nanomaterials written by Geon Dae Moon and published by Springer. This book was released on 2018-12-14 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the recent advances in designing and synthesizing one- and two-dimensional metal chalcogenide nanostructures, along with their practical applications, helping readers understand what has happened, and what is currently happening in the field of nanotechnology. It also includes a comprehensive table showing 1D and 2D nanostructured metal chalcogenides, which presents the recent developments from a synthetic point of view. Further, it describes the wide applicability of anisotropic metal chalcogenides, such as in electronics, energy storage and conversion, and sensors. Lastly it discusses the current understanding of the thermodynamic and kinetic aspects associated with the forming mechanisms of anisotropic metal chalcogenide nanostructures. This book is a valuable reference resource for practitioners and researchers, enabling them to obtain a quick overview of anisotropic metal chalcogenide nanomaterials through synthetic approaches and related applications. Presenting representative applications of anisotropic metal chalcogenide nanomaterials that are important in the industrial sector, it is also of interest to academics and industry specialists.
Author : Alexander V. Kolobov
Publisher : Springer
ISBN 13 : 3319314505
Total Pages : 545 pages
Book Rating : 4.3/5 (193 download)
Download or read book Two-Dimensional Transition-Metal Dichalcogenides written by Alexander V. Kolobov and published by Springer. This book was released on 2016-07-26 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the current status of theoretical and experimental progress in 2 dimensional graphene-like monolayers and few-layers of transition metal dichalcogenides (TMDCs). Semiconducting monolayer TMDCs, due to the presence of a direct gap, significantly extend the potential of low-dimensional nanomaterials for applications in nanoelectronics and nano-optoelectronics as well as flexible nano-electronics with unprecedented possibilities to control the gap by external stimuli. Strong quantum confinement results in extremely high exciton binding energies which forms an interesting platform for both fundamental studies and device applications. Breaking of spatial inversion symmetry in monolayers results in strong spin-valley coupling potentially leading to their use in valleytronics. Starting with the basic chemistry of transition metals, the reader is introduced to the rich field of transition metal dichalcogenides. After a chapter on three dimensional crystals and a description of top-down and bottom-up fabrication methods of few-layer and single layer structures, the fascinating world of two-dimensional TMDCs structures is presented with their unique atomic, electronic, and magnetic properties. The book covers in detail particular features associated with decreased dimensionality such as stability and phase-transitions in monolayers, the appearance of a direct gap, large binding energy of 2D excitons and trions and their dynamics, Raman scattering associated with decreased dimensionality, extraordinarily strong light-matter interaction, layer-dependent photoluminescence properties, new physics associated with the destruction of the spatial inversion symmetry of the bulk phase, spin-orbit and spin-valley couplings. The book concludes with chapters on engineered heterostructures and device applications such as a monolayer MoS2 transistor. Considering the explosive interest in physics and applications of two-dimensional materials, this book is a valuable source of information for material scientists and engineers working in the field as well as for the graduate students majoring in materials science.
Author : Melinda Jean Shearer
Publisher :
ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (18 download)
Download or read book Correlating Spatial Heterogeneity with Electronic and Optical Properties of Transition Metal Dichalcogenides written by Melinda Jean Shearer and published by . This book was released on 2018 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials, although interesting for many applications, often suffer from spatial heterogeneity, i.e., change in the composition, topography, or structure, which will influence the properties of the material. This thesis focuses on understanding the spatial heterogeneity of nanomaterials, particularly the transition metal dichalcogenides, in four key ways. First, we highlight the technique of surface photovoltage-Kelvin probe force microscopy (SPV-KFM), which is a modified version of noncontact atomic force microscopy capable of imaging not only the topography and surface potential but also the surface photovoltage on the nanoscale. We demonstrate its utility in probing monolayer WSe2−MoS2 lateral heterostructures, which form an ultrathin p−n junction promising for photovoltaic and optoelectronic applications. Next, we show and explain how the layer stacking and physical properties of WSe2 are influenced by screw dislocations. A one-to-one correlation of atomic force microscopy and high- and low-frequency Raman spectroscopy of many dislocated WSe2 nanoplates reveals variations in the number and shapes of dislocation spirals and different layer stackings that are determined by the number, rotation, and location of the dislocations. These previously unobserved properties and layer stackings in WSe2 will be interesting for spintronics and valleytronics. Third, we demonstrate the use of UV light to oxidize the surface of WSe2 nanoplates and single crystals, and then remove that oxide with a simple soak in aqueous solution to reveal a modified surface. We demonstrate that this material will have more electron accumulation on the surface and enhanced photoelectrochemical performance, indicating that some deleterious defects have been healed. This method, performed in ambient conditions with simple instruments, can be universally applied to other chalcogenide materials. Finally, I have collaborated with other graduate students who are growing new nanomaterials and collected X-ray Photoelectron Spectroscopy (XPS), Ultraviolet Photoelectron Spectroscopy (UPS), and surface photoresponse (SPR) measurements in order to understand the chemical composition, oxidation states, electronic band structure, and charge transfer properties of these materials. With the new understandings developed here, these nanomaterials can be tailored for their specific applications, particularly for solar energy conversion, catalysis, and optoelectronics.
Author : Rida Atif
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.:/5 (127 download)
Download or read book Single-Source Precursors for the Synthesis of Layered Metal Chalcogenide Nanomaterials: LnX2, CuCrX2, and Bi2X3 written by Rida Atif and published by . This book was released on 2021 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Layered materials belong to a class of compounds in which individual, 2-dimensional units are stacked upon each other and held together by weak intermolecular forces. The layered nature of these materials render them ideal for techniques like intercalation, exfoliation, alloying, among others in order to tune their properties. Here, single-source precursors (SSP) from the lanthanides, transition metals, and main group metals will be synthesized and utilized to yield different classes of layered compounds: LnX2, CuCrX2, and Bi2X3, respectively. First, we describe the synthesis of a series of novel lanthanide SSPs, [Ln(Se2PPh2)3(MeCN)x], which were thermolyzed to yield LnSe2-x, an understudied class of 2D layered materials. In a group known for work with rare earth materials, particularly EuS, it was exciting to have discovered a mild route to other lanthanide chalcogenide materials. We explore the synthetic versatility of these precursors through synthesizing alloys of LnSe2-x as well understanding the growth mechanisms in order to yield single- or few- layered sheets. Next, we describe the synthesis of layered ternary transition metal chalcogenides, CuCrX2 and CuCr2X4 which form as hexagonal nanoplates. We utilized SSPs of Cr(III) and Cu(I)/(II) to understand the role of oxidation state, as well as precursor ratio and reaction temperatures, in order to gain phase control and avoid secondary phases. Lastly, we briefly discuss SSPs for synthesizing layered main group chalcogenide nanomaterials, Bi2X3. Bismuth based materials are in interesting comparison to lanthanides due to their similarity in size and charge but lack of f-block valence electrons. Here, we demonstrate the clear advantage of utilizing a SSP through affording defect-free phase-pure material as clear hexagonal nanoplates (compared to separate Bi(III) and Se reagents).
Author : Allen W. Apblett
Publisher : Elsevier
ISBN 13 : 0128203447
Total Pages : 630 pages
Book Rating : 4.1/5 (282 download)
Download or read book Nanomaterials via Single-Source Precursors written by Allen W. Apblett and published by Elsevier. This book was released on 2022-02-19 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanomaterials via Single-Source Precursors: Synthesis, Processing and Applications presents recent results and overviews of synthesis, processing, characterization and applications of advanced materials for energy, electronics, biomedicine, sensors and aerospace. A variety of processing methods (vapor, liquid and solid-state) are covered, along with materials, including metals, oxides, semiconductor, sulfides, selenides, nitrides, and carbon-based materials. Production of quantum dots, nanoparticles, thin films and composites are described by a collection of international experts. Given the ability to customize the phase, morphology, and properties of target materials, this "rational approach to synthesis and processing is a disruptive technology for electronic, energy, structural and biomedical (nano)materials and devices. The use of single-source chemical precursors for materials processing technology allows for intimate elemental mixing and hence production of complex materials at temperatures well below traditional physical methods and those involving direct combination of elements. The use of lower temperatures enables thin-film deposition on lightweight polymer substrates and reduces damage to complex devices structures such as used in power, electronics and sensors. - Discusses new approaches to synthesis or single-source precursors (SSPs) and the concept of rational design of materials - Includes materials processing of SSPs in the design of new materials and novel devices - Provides comprehensive coverage of the subject (materials science and chemistry) as related to SSPs and the range of potential applications
Author : Jun Chen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (127 download)
Download or read book Atomic Study of Defects in Two-dimensional Transition Metal Chalcogenides Using Electron Microscopy written by Jun Chen and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ahsanulhaq Qurashi
Publisher : John Wiley & Sons
ISBN 13 : 1119008921
Total Pages : 364 pages
Book Rating : 4.1/5 (19 download)
Download or read book Metal Chalcogenide Nanostructures for Renewable Energy Applications written by Ahsanulhaq Qurashi and published by John Wiley & Sons. This book was released on 2014-11-21 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first ever reference book that focuses on metal chalcogenide semiconductor nanostructures for renewable energy applications encapsulates the state-of-the-art in multidisciplinary research on the metal chalcogenide semiconductor nanostructures (nanocrystals, nanoparticles, nanorods, nanowires, nanobelts, nanoflowers, nanoribbons and more). The properties and synthesis of a class of nanomaterials is essential to renewable energy manufacturing and this book focuses on the synthesis of metal chalcogendie nanostructures, their growth mechanism, optical, electrical, and other important properties and their applications in different diverging fields like photovoltaics, hydrogen production, theromelectrics, lithium battery, energy storage, photocatalysis, sensors. An important reference source for students, scientists, engineers, researchers and industrialists working on nanomaterials-based energy aspects associated with chemistry, physics, materials science, electrical engineering, energy science and technology, and environmental science.
Author : Desheng Kong
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (879 download)
Download or read book Synthesis and Applications of Chalcogenide Nanomaterials written by Desheng Kong and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal chalcogenides is a large family of functional materials with rich physical and chemical properties depending on their compositions, dimensions and phases. They have a broad range of applications in electronics, optoelectronics and energy conversion/ storage. The possibility to prepare these materials into low-dimensional nanostructures may allow the access to novel properties that are absent in their bulk counterparts. Such a development, however, requires a reliable approach to controllably synthesize chalcogenides into nanostructures. Here, we primarily employ a horizontal tube furnace reactor to grow such chalcogenide nanomaterials. These nanostructures serve as a material platform to expand the applications of this family of materials towards new areas. We first describe the opportunity to study topological insulator electronic properties in several chalcogenide materials. Topological insulators are narrow-gap semiconductors with metallic electronic states that are always present at their surfaces. The unique property associated with such surface carrier is that the spin direction is determined by its moving direction. The unusual spin texture gives rise to many unusual physical properties. Several chalcogenides are identified as topological insulators based on theoretical calculations and spectroscopic measurements. However, there are many challenges to make use of their exotic properties in electrical measurements. We propose topological insulator nanostructures, with large surface-to-volume ratio, enhance the surface properties in electron transport process. Our systematic transport measurements reveal the signature of the surface carriers on nanostructures of these chalcogenides. Combined with detailed structural and compositional analyses, our studies addressed some material challenges to probe and access the surface electronic properties on these chalcogenide topological insulators. Some chalcogenide nanomaterials also serve as attractive electrocatalysts for water splitting. With the interest to use hydrogen as a sustainable and carbon-free energy carrier, it is attractive to explore and optimize catalyst materials suitable for electrochemical water reduction. Certain layered dichalcogenides, such as MoS2 and WS2, are chemically active electrocatalysts for hydrogen evolution reaction (HER), with the promise to replace noble metal catalysts like Pt. Previous studies have identified the edges of the molecular layers are catalytically active, which opens up a rational pathway to boost the activity by increasing the exposed edge sites. We developed a synthesis technique to produce edge-rich thin films and nanostructures. The structural engineering and further chemical doping process allow us to access novel MoS2 catalyst with high activity for HER. In addition, we also identified a new group of first-row transition metal dichalcogenides (ME2, M = Fe, Co, Ni ; E = S, Se) catalytically active towards HER. These catalysts exhibit excellent activity and stablilty that expand the family of non-precious HER catalysts.
