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Author: Syed Muhammad Alay-e-Abbas Publisher: LAP Lambert Academic Publishing ISBN: 9783844324990 Category : Languages : en Pages : 100
Book Description
Ground-state structural properties of alkali metal chalcogenides have been studied in the framework of density functional theory (DFT) using local density approximation (LDA), Perwed-Burke-Ernzerhof (PBE) generalized gradient approximation (GGA) and Wu-Cohen (WC) GGA parameterization schemes. Electronic band structure of alkali metal chalcogenide compounds have been calculated using the aforementioned schemes as well as the modified GGA proposed by Engel and Vosko (EV). The calculated structural parameters for all 16 materials have been compared with earlier theoretical and experimental data. Electronic density of states for these compounds has been presented and behavior in electronic properties analyzed. Optical properties are obtained in terms of real and imaginary parts of incident photon's frequency dependent complex dielectric function. Trends in the physical properties of this important crystal facmily have been identified and discussed in the context of their applications in technologically important opto-electronic devices.
Author: Syed Muhammad Alay-e-Abbas Publisher: LAP Lambert Academic Publishing ISBN: 9783844324990 Category : Languages : en Pages : 100
Book Description
Ground-state structural properties of alkali metal chalcogenides have been studied in the framework of density functional theory (DFT) using local density approximation (LDA), Perwed-Burke-Ernzerhof (PBE) generalized gradient approximation (GGA) and Wu-Cohen (WC) GGA parameterization schemes. Electronic band structure of alkali metal chalcogenide compounds have been calculated using the aforementioned schemes as well as the modified GGA proposed by Engel and Vosko (EV). The calculated structural parameters for all 16 materials have been compared with earlier theoretical and experimental data. Electronic density of states for these compounds has been presented and behavior in electronic properties analyzed. Optical properties are obtained in terms of real and imaginary parts of incident photon's frequency dependent complex dielectric function. Trends in the physical properties of this important crystal facmily have been identified and discussed in the context of their applications in technologically important opto-electronic devices.
Author: Mohammad Mansoob Khan Publisher: Elsevier ISBN: 0128209178 Category : Technology & Engineering Languages : en Pages : 378
Book Description
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: Kristi Lew Publisher: The Rosen Publishing Group, Inc ISBN: 143585330X Category : Juvenile Nonfiction Languages : en Pages : 50
Book Description
Explains the characteristics of alkali metals, where they are found, how they are used by humans, and their relationship to other elements found in the periodic table.
Author: Bruce Averill Publisher: ISBN: 9780321413703 Category : Chemistry Languages : en Pages : 1233
Book Description
Emphasises on contemporary applications and an intuitive problem-solving approach that helps students discover the exciting potential of chemical science. This book incorporates fresh applications from the three major areas of modern research: materials, environmental chemistry, and biological science.
Author: Suresh Sagadevan Publisher: BoD – Books on Demand ISBN: 0854661859 Category : Science Languages : en Pages : 112
Book Description
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: Francesco A. Devillanova Publisher: Royal Society of Chemistry ISBN: 0854043667 Category : Science Languages : en Pages : 889
Book Description
Provides an overview of the developments on the chemistry of the chalcogen group elements (S, Se and Te). Organised into two parts, this book deals systematically with the chemistry of chalcogens in relation to other group elements in the periodic table, and also includes an overview of metal-chalcogenides and metal-polychalcogenides.
Author: A.P. Legrand Publisher: Springer Science & Business Media ISBN: 1475796498 Category : Science Languages : en Pages : 503
Book Description
Conjugated polymers suoh as polyaoetylene (CH)x polyphenylene (C6H4)x' poly thiophene (C4H2S)x' etc., which are insulators in their pristine state, can be brought to the metallic state after "doping" with ohemioal speoies whioh oan be either eleotron donors or I aoceptors. . This doping prooess involves a oharge transfer between the dopant moleoule and the polymer ohain whioh are then supposed to be spatially olose to each other. It follows that the meohanism of doping must be oonsidered as an aotual interoalation process, which will greatly affeot the struotural oharacteristios of the starting material, as well as its morphology, as has been observed during the 2 intercalation of graphite and layered compounds . In parallel with these modifioations, the band struoture of the system changes yielding a new set of eleotronio properties. It is evident therefore that the struotural and eleotronio properties are intimately related, and must be studied simultaneously in the same system to give reliable information. A great number of studies have been devoted to the structural and electronic properties of conjugated polymers after a chemical or 2 electrochemical doping process . Most of these concern the properties of the system for a given dopant concentration. With this approach a universal pioture of the polymer/dopant system is very diffioult to obtain, as a comparison between different experiments is very hazardous. On the other hand, only a small number of measurements have been performed during the continuous electroohemioal doping of various polymers.
Author: Mirtat Bouroushian Publisher: Springer Science & Business Media ISBN: 3642039677 Category : Science Languages : en Pages : 365
Book Description
The author provides a unified account of the electrochemical material science of metal chalcogenide (MCh) compounds and alloys with regard to their synthesis, processing and applications. Starting with the chemical fundamentals of the chalcogens and their major compounds, the initial part of the book includes a systematic description of the MCh solids on the basis of the Periodic Table in terms of their structures and key properties. This is followed by a general discussion on the electrochemistry of chalcogen species, and the principles underlying the electrochemical formation of inorganic compounds/alloys. The core of the book offers an insight into available experimental results and inferences regarding the electrochemical preparation and microstructural control of conventional and novel MCh structures. It also aims to survey their photoelectrochemistry, both from a material-oriented point of view and as connected to specific processes such as photocatalysis and solar energy conversion. Finally, the book illustrates the relevance of MCh materials to various applications of electrochemical interest such as (electro)catalysis in fuel cells, energy storage with intercalation electrodes, and ion sensing.
Author: Syed Muhammad Alay-e-Abbas
Author: Syed Muhammad Alay-e-Abbas
Author: Mohammad Mansoob Khan
Author: Kristi Lew
Author: Bruce Averill
Author: Suresh Sagadevan
Author: Kyungsoo Ahn
Author: Francesco A. Devillanova
Author: Egon Wiberg
Author: A.P. Legrand
Author: Mirtat Bouroushian