Download or read book Synthesis and Characterization of Metal semiconductor Nanoparticles and Their Arrangement Into Superstructures written by Danny Haubold and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiconductor Nanocrystals and Metal Nanoparticles written by Tupei Chen and published by CRC Press. This book was released on 2016-10-14 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor nanocrystals and metal nanoparticles are the building blocks of the next generation of electronic, optoelectronic, and photonic devices. Covering this rapidly developing and interdisciplinary field, the book examines in detail the physical properties and device applications of semiconductor nanocrystals and metal nanoparticles. It begins with a review of the synthesis and characterization of various semiconductor nanocrystals and metal nanoparticles and goes on to discuss in detail their optical, light emission, and electrical properties. It then illustrates some exciting applications of nanoelectronic devices (memristors and single-electron devices) and optoelectronic devices (UV detectors, quantum dot lasers, and solar cells), as well as other applications (gas sensors and metallic nanopastes for power electronics packaging). Focuses on a new class of materials that exhibit fascinating physical properties and have many exciting device applications. Presents an overview of synthesis strategies and characterization techniques for various semiconductor nanocrystal and metal nanoparticles. Examines in detail the optical/optoelectronic properties, light emission properties, and electrical properties of semiconductor nanocrystals and metal nanoparticles. Reviews applications in nanoelectronic devices, optoelectronic devices, and photonic devices.

Download or read book Nanoparticulate Materials written by Kathy Lu and published by John Wiley & Sons. This book was released on 2012-09-25 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Serving as the only systematic and comprehensive treatment on the topic of nanoparticle-based materials, this book covers synthesis, characterization, assembly, shaping and sintering of all types of nanoparticles including metals, ceramics, and semiconductors. A single-authored work, it is suitable as a graduate-level text in nanomaterials courses.

Download or read book Synthesis and Characterization of Metal and Semiconductor Nanoparticles written by Nam K. Ly and published by . This book was released on 2001 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Semiconductor and Metal Nanocrystals written by Victor I. Klimov and published by CRC Press. This book was released on 2003-11-07 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast technological potential of nanocrystalline materials, as well as current intense interest in the physics and chemistry of nanoscale phenomena, has led to explosive growth in research on semiconductor nanocrystals, also known as nanocrystal quantum dots, and metal nanoparticles. Semiconductor and Metal Nanocrystals addresses current topics impacting the field including synthesis and assembly of nanocrystals, theory and spectroscopy of interband and intraband optical transitions, single-nanocrystal optical and tunneling spectroscopies, electrical transport in nanocrystal assemblies, and physical and engineering aspects of nanocrystal-based devices. Written by experts who have contributed pioneering research, this reference comprises key advances in the field of semiconductor nanocrystal quantum dots and metal nanoparticles over the past several years. Focusing specifically on nanocrystals generated through chemical techniques, Semiconductor and Metal Nanocrystals Merges investigative frontiers in physics, chemistry, and engineering Documents advances in nanocrystal synthesis and assembly Explores the theory of electronic excitations in nanoscale particles Presents comprehensive information on optical spectroscopy of interband and intraband optical transitions Reviews data on single-nanocrystal optical and tunneling spectroscopies Weighs controversies related to carrier relaxation dynamics in ultrasmall nanoparticles Discusses charge carrier transport in nanocrystal assemblies Provides examples of lasing and photovoltaic nanocrystal-based devices Semiconductor and Metal Nanocrystals is a must read for scientists, engineers, and upper-level undergraduate and graduate students interested in the physics and chemistry of nanoscale semiconductor and metal particles, as well as general nanoscale science.

Download or read book Characterization of Semiconductor Heterostructures and Nanostructures written by Giovanni Agostini and published by Newnes. This book was released on 2013-04-11 with total page 829 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization of Semiconductor Heterostructures and Nanostructures is structured so that each chapter is devoted to a specific characterization technique used in the understanding of the properties (structural, physical, chemical, electrical etc..) of semiconductor quantum wells and superlattices. An additional chapter is devoted to ab initio modeling. The book has two basic aims. The first is educational, providing the basic concepts of each of the selected techniques with an approach understandable by advanced students in Physics, Chemistry, Material Science, Engineering, Nanotechnology. The second aim is to provide a selected set of examples from the recent literature of the TOP results obtained with the specific technique in understanding the properties of semiconductor heterostructures and nanostructures. Each chapter has this double structure: the first part devoted to explain the basic concepts, and the second to the discussion of the most peculiar and innovative examples. The topic of quantum wells, wires and dots should be seen as a pretext of applying top level characterization techniques in understanding the structural, electronic etc properties of matter at the nanometer (and even sub-nanometer) scale. In this respect it is an essential reference in the much broader, and extremely hot, field of Nanotechnology. Comprehensive collection of the most powerful characterization techniques for semiconductors heterostructures and nanostructures Most of the chapters are authored by scientists that are world-wide among the top-ten in publication ranking of the specific field Each chapter starts with a didactic introduction on the technique The second part of each chapters deals with a selection of top examples highlighting the power of the specific technique to analyse the properties of semiconductors heterostructures and nanostructures

Download or read book Synthesis and Characterization of Semiconductor and Semiconductor metal Nanoparticles written by Elena Selishcheva and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is a contribution to the development of colloidal synthesis of different nanomaterials, such as lead chalcogenide, indium oxide nanoparticles, and hybrid nanostructures, consisting of copper indium sulfide selenide and gold nanoparticles. In the first part, nearly monodispersePbE (E=S, Se, Te) semiconductor nanoparticles produced via a novel synthesis which includes the occurrence of in situ formed Pb0-particles are shown. Spherical PbSe nanoparticles are further investigated with respect to possible application in hybrid solar cells. The second part is about a novel non-injection synthesis route for the preparation of colloidal In2O3 nanocrystals. The shape of the nanocrystals can be influenced by the addition of copper ions. Finally, the selective growth of gold nanocrystals onto CuInSSe nanoparticles to form semiconductor/metal hybrid nanostructures is demonstrated. During the synthesis gold nanocrystals grow onto vertexes of CuInSSe pyramids. engl.

Download or read book Metal Semiconductor Core shell Nanostructures for Energy and Environmental Applications written by Raju Kumar Gupta and published by Elsevier. This book was released on 2017-04-28 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Semiconductor Core-Shell Nanostructures for Energy and Environmental Applications provides a concise, scholarly overview of current research into the characterization of metal semiconductor core-shell nanostructures; the book shows how their properties can be best used in energy and environmental applications, particularly for solar cell and catalysis application. Coverage is also given to the effect of metal nanoparticle for charge generation or charge separation. The book is a valuable resource for academic researchers working in the areas of nanotechnology, sustainable energy and chemical engineering, and is also of great use to engineers working in photovoltaic and pollution industries. - Includes a clear method for synthesis of core-shell nanomaterials - Explores how metal semiconductor core-shell nanostructures can be used to improve the efficiency of solar cells - Explains how the characteristics of metal semiconductor core-shell nanostructures make them particularly useful for sustainable energy and environmental applications

Download or read book Synthesis and Characterization of Transition metal Nanocrystals and Their Application in Catalysis written by Guangjun Cheng and published by . This book was released on 2003 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Transition Metal Nitride and Selenide Nanocrystals and Heterostructures written by Robert William Lord and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The properties of nanomaterials are intimately dependent on their size, morphology, composition both elemental and structural, as well as their crystal structure or atomic arrangement. There exists a fundamental need to develop methods to precisely control and tune these parameters in order to target desirable materials. Colloidal chemistries utilize wet chemical precursors to synthesize inorganic nanomaterials from the bottom up and produce high quality materials. In addition to single component material synthesis, colloidal chemistries have been developed to synthesize multicomponent nanomaterials systems through a process called seeded growth. Seeded growth utilizes preformed nanoparticles as substrates to nucleate and grow new materials from their surfaces. This has led to the synthesis of highly complex heterostructured nanoparticles which allow for the incorporation of multiple material properties within single particle frameworks. While these techniques can control the structure and composition of the synthesized material, they do not allow for as much control over the resulting crystal structure. Other methods have been developed which allow for crystallographic templating and compositional modulation by post-synthetic cation exchange. Cation exchange utilizes molecular agents to solvate and exchange host cations in preformed crystals with those in solution while maintaining the anion sublattice relatively unperturbed. The crystallographic symmetry of the anion sublattice determines the symmetry of the final product phase. As such, cation exchange has allowed researchers to synthesize materials which are either metastable in bulk or not easily assessable through other methods. In this dissertation I discuss my efforts to utilize these synthetic tools to synthesize new and complex inorganic nanoparticles. First, I describe the seeded growth of Cu3N and Cu3PdN on Pt and Au nanocrystals. Utilizing Pt-Cu3PdN as the model system, it was observed that Cu3PdN nucleated and grew in a step-wise pathway with the initial deposition of Cu onto the surface. This was followed by the deposition of Pd onto the corners and edges of the Pt nanocubes which was followed by the coalescence and crystallization of Cu with the Pd to ultimately give Cu3PdN. When nucleating on more faceted or spherical seeds, whether Pt or Au, the resulting heterostructures took on more core@shell structures. In the absence of Pd, Cu3N nucleates indiscriminately on the surface of Pt without any of the regioselectivity seen with Cu3PdN. When utilizing Au seeds, AuCu alloy formation is observed without any apparent heterostructure formation. These observations helped us develop guidelines which are anticipated to be applicable to the formation of other ternary nitride heterostructures. Second, I discuss the synthesis of a new, metastable phase of copper selenide nanoparticles. This material was shown by EDS and XPS to adopt a nominally 2:1 stoichiometry and the XRD pattern did not match any known phase of Cu2-xSe. However, the nanoparticles did adopt a crystal structure similar to previously observed weissite Cu2-xTe. A structural model for our Cu2-xSe phase was developed utilizing a recently reported structural model for weissite Cu2-xTe which was computationally verified in collaboration with Professor Ismaila Dabo's group. Weissite-like Cu2-xSe has trigonal symmetry (space group P ̄3 m1) and is a layered structure with alternative Cu-rich and Cu-deficient layers sandwiched between layers of Se. UV-vis-NIR spectroscopy of weissite-like Cu2-xSe showed a broad plasmon absorbance band centered around 1550 nm. Lastly, I discuss my efforts to develop synthetic guidelines for the competitive synthesis of ternary copper selenide phases during their nucleation on Pt nanoparticle seeds. We showed experiments which allude to two potential synthetic pathways for the formation of CuFeSe2 and CuInSe2. It was observed that the CuInSe2 forms through a multistep pathway starting with the initial nucleation of Cu2-xSe followed by the incorporation of the In3+ through a high temperature cation exchange reaction. However, CuFeSe2 was shown to most likely to form by direct nucleation. The differences in these reactions were observed when their simultaneous nucleation was attempted, where only Pt--CuIn¬Se2 formed.

Download or read book Synthesis and Characterization of Nanostructured Semiconductor Materials by Self assembling Methods written by Hong Yang and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reported synthesis of TiO2 nanostructures and Fe2O3 nanostructures and studied on self-assembling process. The morphologies, compositions, and physicochemical properties of the prepared samples were characterized by TEM, FESEM, XRD, FTIR, UV, and SQUID etc. Nanoparticles of transition metal oxides own their special function to become an interesting hot research topic in the recent decades. In particular, superparamagnetic iron oxide nanoparticles can be used as drug delivery agent and new hard disc drive materials. They have wide application in environment industry as well. Titanium dioxide nanoparticles can be applied in photocatalysts, UV protectors and dye sensitive solar cell etc. Their wide industrial applications for advanced technology development motivate scientists to develop simple, economical and novel synthetic methods, and explore their applications, so that the commercialization of the production of the nanomaterials becomes feasible. The objective of this project is to develop an effective, simple and economical technical route for synthesis of nanosized iron oxide and titanium oxide particles/rods/films. The approach and the progress are outlined as follows. Based on extensive literature reading on the project related area, a novel self-assembling technical route for iron oxide nanostructure and architecture was proposed which has been confirmed to be effective. Detailed experimental investigation on the synthesis of nanoparticles/rods, and instrumental characterization of the particle size, structure, and crystallites, etc. via TEM, FESEM, XRD, FTIR, UV, SQUID are conducted. Uniform nanorods of hematite iron oxide and titanium oxide nanospheres, and anatase TiO2 thin film with micropores have been successfully achieved. Some preliminary exploration for applications of the synthesized nanomaterials has also been carried out. Firstly, a novel assembled scheme of iron oxide nanostructure and architecture by selfassembling process was investigated. The sol-gel technical route was employed to synthesize nearly uniform nanorods of hematite particles. Morphologies and physicochemical properties of iron oxide nanostructure were characterized by analytical instrument. Secondly, titanium oxide nanospheres were synthesized via a hydrothermal process using titanium isopropoxide as the precursor. Titanium oxide nanospheres with inner nanospace andhighly organized crystallites in the shell structure and surface regions were synthesized. It demonstrated that the technical route developed in this work has a high versatility for structural engineering of various targeted morphological products. Thirdly, a simple process of preparing anatase TiO2 thin film with micropores was pursued. The synthesized nano thin film with micropores was used for the material of dye-sensitive solar cell; and effective electron transfer of titanium oxide electrode was confirmed by electrochemical voltammetry. Preparation of the titanium oxide electrode and its electrochemical analysis was studied. The application of the titanium oxide of microporous thin film material as a promoter for electrochemistry voltammetry measuring system was explored in this thesis. In conclusion, the iron oxide nanorods with superparamagnetic property were successfully synthesized by a simple method with low cost materials. Titanium oxide hollow nanospheres were achieved by the assistance of copolymer template. Titanium oxide thin film with microporous structure with significantly high efficiency in electron transfer was realized. Further researches on the synthesis of hybrid iron oxide and titanium oxide nanoparticles, their crystal growth architecture and mechanism, as well as exploration of their applications are recommended.

Download or read book Handbook of Nanoscience Engineering and Technology written by William A. Goddard III and published by CRC Press. This book was released on 2018-09-03 with total page 1075 pages. Available in PDF, EPUB and Kindle. Book excerpt: In his 1959 address, "There is Plenty of Room at the Bottom," Richard P. Feynman speculated about manipulating materials atom by atom and challenged the technical community "to find ways of manipulating and controlling things on a small scale." This visionary challenge has now become a reality, with recent advances enabling atomistic-level tailoring and control of materials. Exemplifying Feynman’s vision, Handbook of Nanoscience, Engineering, and Technology, Third Edition continues to explore innovative nanoscience, engineering, and technology areas. Along with updating all chapters, this third edition extends the coverage of emerging nano areas even further. Two entirely new sections on energy and biology cover nanomaterials for energy storage devices, photovoltaics, DNA devices and assembly, digital microfluidic lab-on-a-chip, and much more. This edition also includes new chapters on nanomagnet logic, quantum transport at the nanoscale, terahertz emission from Bloch oscillator systems, molecular logic, electronic optics in graphene, and electromagnetic metamaterials. With contributions from top scientists and researchers from around the globe, this color handbook presents a unified, up-to-date account of the most promising technologies and developments in the nano field. It sets the stage for the next revolution of nanoscale manufacturing—where scalable technologies are used to manufacture large numbers of devices with complex functionalities.

Download or read book Synthesis and Characterization of Semiconductor Nanomaterials for Thermoelectric Applications written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, I explore simple chemical means to produce various nanomaterials. In Chapter 2, the synthesis of size-tuned bismuth telluride nanoparticles is discussed. The solution phase synthesis of bismuth telluride nanoparticles has been accomplished in the presence of a library of thiols as the capping ligand. These crystalline nanostructures range in size from?20 to?100nm with a relatively narrow size dispersity. Size and shape of the resulting nanostructures has been investigated as a function of chain length of the thiol and temperature. An investigation into the thermoelectric properties of the nanostructures shows promising electrical conductivity, thermopower, and thermal conductivity for undoped bismuth telluride. In Chapter 3, a soluble precursor for antimony telluride is described. This precursor was used to fabricate semiconductor nanowires of varying diameter and thin films through simple templatingmethods. Electrical conductivity and thermoelectric power measurements of these films are only slightly lower than for antimony telluride films fabricated by vacuum deposition. In Chapter 4, the polytetrafluoroethylene (PTFE)/metal nanocomposites are discussed. Palladium and nickel PTFE nanocomposites were made by impregnation of the polymer with metal acetates. Annealing and jet blowing of these materials form PTFE nanofiber/metal nanoparticle composites.

Download or read book The Colloidal Chemistry Synthesis and Electron Microscopy Characterization of Shape controlled Metal and Semiconductor Nanocrystals written by Adam Biacchi and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Solution methods of materials synthesis have found application in a variety of fields due to the diversity of products accessible, facility of process scalability, and the ease of tuning their properties through prudent selection of reaction conditions. Control of experimental variables during the formation of colloidally stable nanoscale solids within a liquid matrix allows for tailoring of the particles' characteristics, including shape, size, composition, and surface chemistry. In this dissertation, I will discuss how the manipulation of reaction chemistries can be used to synthesize shape-controlled metal and semiconductor colloidal nanocrystals. Further, I will elaborate on the mechanisms by which these particles form from molecular precursors and describe how their properties can differ from their bulk analogues through extensive characterization, especially using transmission electron microscopy. These studies contribute to the continued development of chemical routes to nanocrystals and their application as functional materials.First, I will review recent advances in the synthesis and characterization of shape-controlled nanocrystals, as well as highlight their promising applicability in a number of emerging technologies. These principles will then be leveraged to the specific case of catalytically-active rhodium nanocrystals, which can be synthesized with morphological and dimensional control using a polyol solution-mediated strategy. I describe an innovative shape-controlled synthesis to monodisperse colloidal rhodium icosahedra, cubes, triangular plates, and octahedra using this route. Additionally, new insights into the important role of the polyol reducing solvent on the synthesis of these nanocrystals are revealed, and how these might be exploited to engender superior reaction control and novel products.Next, I will describe how a crystallization mechanism was established for the synthesis of numerous morphologies of noble metal nanocrystals. I present a thorough analysis of the synthesis of shape-controlled rhodium nanocrystals, using extensive transmission electron microscopy characterization, and relate these findings to one of the primary synthetic levers available in the polyol synthesis: the anionic ligands present. Further, I show that the crystallization process proceeds by a nonclassical mechanism in which cluster particles serve as a stable intermediate between molecular precursors and the final product. I then apply these principles to the shape-controlled synthesis of other noble metal nanocrystals before expounding a generalized formation mechanism in the polyol synthesis of colloidal metal nanocrystals. Finally, I will highlight my efforts in the designed synthesis and characterization of colloidal tin(II) sulfide (SnS) semiconducting "quantum dot" nanocrystals. I describe a route for the solution synthesis of monodisperse colloidal SnS nanosheets, nanocubes, and nanospherical polyhedra in high yield. Further, detailed crystallographic characterization of these nanocrystals using transmission electron microscopy indicates that their atomic structure possesses a previously-unreported nanoscale deviation from the bulk phase. Additionally, I show that their electronic and photocatalytic properties of these quantum dots are both shape-dependent and distinct from bulk SnS.

Download or read book Synthesis and Characterization of 2D and 3D Arrays of Metal and Semiconductor Nanoparticles of Tunable Sizes in Supercritical Carbon Dioxide written by Carlos Alberto Fernandez and published by . This book was released on 2006 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interest in nanoscale materials stems from the fact that new properties are acquired at this scale and, equally important, that these properties change with their size or shape. This, together with the ability to make nanoparticles in different sizes and shapes, makes them potentially useful for the application in photonic and optoelectronic devices or in catalysis.

Download or read book Laser assisted Synthesis and Characterization of Silver and II VI Semiconductor Nanoparticles in Suspension written by John Anthony Young and published by . This book was released on 2005 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Metal semiconductor Nanocomposites for Photocatalysis written by Tina Mavrič and published by . This book was released on 2017 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: