Semiconductor Nanocrystals, Plasmonic Metal Nanoparticles, and Metal-Hybrid Structures PDF Download

Author: Masaru Kuno
Publisher:
ISBN: 9781713808183
Category :
Languages : en
Pages : 81

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Author:
Publisher:
ISBN:
Category : Metal buildings
Languages : en
Pages :

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Author: Swayandipta Dey
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages :

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Recent scientific progress has resulted in the development of sophisticated hybrid nanostructures composed of semiconductor nanocrystals (quantum dots, QDs) and metal nanoparticles (MNPs). These hybrid structures open up new possibilities for developing next generation nanoscale optoelectronic devices that combine the best attributes of each component material.The optical response of MNPs is dominated by surface plasmon resonances which create large local electromagnetic field enhancements. When coupled to surrounding semiconductor components, the enhanced local electric field results in strong absorption/emission, alteration in emission decay rates, enhancement in exciton emission and other interesting non-linear effects (multiphoton generation). Although hybrid nanostructures are poised to be utilized in a variety of applications, serious hurdles for the design of new devices still remain. These difficulties largely result from a poor understanding of how the structural components interact at the nanoscale. These synergetic interactions strongly depend on the exact composition and geometry of the structure, and therefore, a quantitative comparison between theory and experiment is often difficult to achieve. My dissertation work primarily focuses on paving a bridge between the experimental and theoretical studies and the mechanisms involved in exciton and multiexciton emission dynamics of single QDs in presence of plasmonic nanostructures by careful consideration of different parameters which significantly affect the interaction between these nanoparticles at a single particle level.

Author: Tupei Chen
Publisher: CRC Press
ISBN: 1315357003
Category : Technology & Engineering
Languages : en
Pages : 732

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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.

Author: Michaela Meyns
Publisher: diplom.de
ISBN: 3954897938
Category : Science
Languages : en
Pages : 211

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Metal-semiconductor hybrid nanoparticles combine materials with different physical properties in one nanostructure. Charge separation processes and potentially increased conductivity in thin film devices make them promising candidates for advanced applications in photocatalysis or (opto) electronics. The work on hand deals with the preparation of CdSe nanoparticles that later act as seeds for the defined deposition of metals and with the electrical characterisation of monolayers of the resulting hybrid structures. In context with the shape control of the semiconductor component in a hot injection synthesis, the role of halogen compounds and the influence of their molecular structure are examined. Analytically as well as theoretically supported explanations for the formation of the evolving hexagonal pyramidal shape, which is especially favourable for metal deposition, are presented. The deposition of different metals onto the obtained semiconductor components is examined and unusual instabilities of an Au shell on CdSe hybrid nanoparticles are investigated. Furthermore, the impact of deposited Pt on the electrical transport of CdSe nanopyramids is demonstrated.

Author: Victor I. Klimov
Publisher: CRC Press
ISBN: 0824757831
Category : Science
Languages : en
Pages : 479

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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. About the Editor: VICTOR I. KLIMOV is Team Leader, Softmatter Nanotechnology and Advanced Spectroscopy Team, Chemistry Division, Los Alamos National Laboratory, New Mexico. The recipient of the Los Alamos Fellows Prize (2000), he is a Fellow of the Alexander von Humboldt Foundation, leader of the Nanophotonics and Nanoelectronics Thrust of the Center for Integrated Nanotechnologies (U.S. Department of Energy), a member of the Los Alamos Board of Governors of the Institute for Complex Adaptive Matter, and a member of the Steering Committee for the Los Alamos Quantum Institute. He received the M.S. (1978), Ph.D. (1981), and Dr. Sci. (1993) degrees from Moscow State University, Russia.

Author: Alexey A. Toropov
Publisher: Oxford University Press, USA
ISBN: 0199699313
Category : Science
Languages : en
Pages : 385

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One of the most promising trends in modern nanophotonics is the employment of plasmonic effects in the engineering of advanced device nanostructures. This book implements the binocular vision of such a complex metal-semiconductor system, examining both the constituents and reviewing the characteristics of promising constructive materials.

Author: Caixia Kan
Publisher: John Wiley & Sons
ISBN: 3527351744
Category : Technology & Engineering
Languages : en
Pages : 469

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Book Description
Firsthand insights on a unique class of optoelectronic materials, covering technologies and applications in catalysis, sensing, and spectroscopy Plasmonic Metal Nanostructures provides broad coverage of the field of plasmonic technologies, from fundamentals to real-world applications such as highly sensitive spectroscopy and surface analysis techniques, summarizing the recent progress in plasmonics and their applications, with a focus on comprehensive and authoritative discussions of fabrication and characterization of the materials and their technological uses. The text also addresses current trends and advances in materials for plasmonics, such as nanostructures with novel shapes, composite nanostructures, and thin films. Starting with an overview of optical properties in materials from macro- to micro- and nanoscale, the text then moves on to discuss the fundamentals and dielectric modifications and advanced characterization methods of plasmonic nanostructures. Next, the latest development of metal nanostructures, such as core-shell and porous nanorods, nanowires for conductive films, new star-like nanoplates, different open nanostructures, and metal-semiconductor composite nanostructures, are explained in detail. The final portion of the text discusses applications of plasmonics for semiconductor optoelectronic devices, catalysis, sensing, SERS (surface-enhanced Raman Spectroscopy), and energy. Written by a highly qualified academic, Plasmonic Metal Nanostructures covers sample topics such as: Drude model for free electron gas, dielectric function of the free electron gas, surface plasmon polaritons, plasmon at metal-vacuum interface, and surface plasmon effects Drude-Lorentz model of metal nanoparticles, dielectric properties of complex nanostructures, optical property analysis of isolated nanoparticles, and numerical simulation of optical properties One-dimensional Au nanostructures, core-shell nanostructures, alloy Au/Ag nanorods, porous nanorods, and yolk-shell nanostructures FCC nanoplates, Au nanoplates with novel and well-defined shapes, metal decorated semiconductors, and optical properties of Au NBP-embedded nanostructures Providing complete coverage of plasmonic nanostructures and their applications in catalysis, sensing, spectroscopy, thin-film, analysis, optoelectronics, and a variety of other fields. The book about Plasmonic Metal Nanostructures is an essential resource for materials scientists, physics researchers and photochemists, along with catalytic, biomedical, and physical chemists.

Author: Materials Research Society. Fall Meeting Symposium CC.
Publisher:
ISBN:
Category : Nanostructures
Languages : en
Pages :

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Author: Natalia Razgoniaeva
Publisher:
ISBN:
Category : Quantum dots
Languages : en
Pages : 99

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My dissertation work focuses on several aspects in nanoscale materials for photocatalysis. Several nanostructured architectures were explored as detailed below. The present work demonstrates a general strategy for coupling the near field (NF) radiation of surface plasmons to long-lived optical excitations in semiconductor nanocrystals (NCs) was investigated. A unique signature of the plasmon to exciton energy transfer was observed in photoexcitation measurements that unambiguously correlate the increase in the CdSe exciton population with the excitation of plasmon modes in Au domains. That scheme for harvesting the NF radiation of metal nanoparticles presents an excellent opportunity for extracting the evanescent emission of surface plasmons. Furthermore, an experimental strategy was developed for monitoring the time-dependent monomer concentration during the hot-injection synthesis of Ag nanocrystals. The present approach employs Au nanoparticles as chemical probes of the Ag monomer build-up in the reaction flask. The precipitation of Ag on the surface of Au nanoparticles is diffusion–limited and results in a blue-shift of the plasmon resonance which is used to gauge the Ag monomer concentration, [Ag0]. In particular, it was shown that the nucleation rate is independent of the reaction temperature but is highly sensitive to the concentration of free ligands in solution. Eventually, a general strategy for the synthesis of colloidal semiconductor nanocrystals (NCs) exhibiting the size dispersion below 5% was demonstrated. That approach relies on the sequential deposition of fully saturated cationic and anionic monolayers onto small-diameter clusters, which leads to focusing of nanocrystal sizes with the increasing particle diameter. The present synthesis is amenable to different types of semiconductor nanocrystals and can potentially offer a viable alternative to traditional hot-injection strategies of the nanoparticle growth.