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Author : Yikuan Wang
Publisher :
Page : 143 pages
File Size : 12,97 MB
Release : 2009
Category : Cadmium selenide
ISBN :
Author : Yikuan Wang
Publisher : LAP Lambert Academic Publishing
Page : 116 pages
File Size : 28,72 MB
Release : 2012-07
Category :
ISBN : 9783659166198
Over the past decades, the use of surface plasmons (SPs) of noble metal nano-particles to control light emission on the nanometer scale has increased rapidly, due to their field enhancement and other special properties. With this boom in physics, chemistry, biomedical science and engineering has also come a rise in the need for understanding the dynamics of light emission in these systems. Traditional photoluminescence spectrum only gives limited information on quantum dot emission under SP resonances. This book, therefore, uses modern Time-Correlated Single Photon Counting technique and other approaches to study SPs in nanoparticle arrays, and their effects on semiconductor quantum dot emission. The observed SP resonances in metal nano-disc arrays enhances the CdSe/ZnS (core/shell) quantum dot emission in a way that is dependent on dipole emission angle and photon polarization, which is fully explained by quantum electrodynamics. This fundamental finding could be used to control the light emission in plasmonic device applications.
Author : Satyabrata Mohapatra
Publisher : Elsevier
Page : 674 pages
File Size : 17,75 MB
Release : 2018-10-11
Category : Technology & Engineering
ISBN : 0128141352
Noble Metal-Metal Oxide Hybrid Nanoparticles: Fundamentals and Applications sets out concepts and emerging applications of hybrid nanoparticles in biomedicine, antibacterial, energy storage and electronics. The hybridization of noble metals (Gold, Silver, Palladium and Platinum) with metal-oxide nanoparticles exhibits superior features when compared to individual nanoparticles. In some cases, metal oxides act as semiconductors, such as nano zinc oxide or titanium oxide nanoparticles, where their hybridization with silver nanoparticles, enhanced significantly their photocatalytic efficiency. The book highlights how such nanomaterials are used for practical applications. Examines the properties of metal-metal oxide hybrid nanoparticles that make them so adaptable Explores the mechanisms by which nanoparticles interact with each other, showing how these can be exploited for practical applications Shows how metal oxide hybrid nanomaterials are used in a range of industry sectors, including energy, the environment and healthcare
Author : Tupei Chen
Publisher : CRC Press
Page : 526 pages
File Size : 18,1 MB
Release : 2016-10-14
Category : Technology & Engineering
ISBN : 1439878315
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 : Alexey A. Toropov
Publisher : Oxford University Press, USA
Page : 385 pages
File Size : 37,74 MB
Release : 2015
Category : Science
ISBN : 0199699313
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 : Alexey A. Toropov
Publisher : OUP Oxford
Page : 385 pages
File Size : 24,5 MB
Release : 2015-04-02
Category : Technology & Engineering
ISBN : 0191054003
Metal-semiconductor nanostructures represent an important new class of materials employed in designing advanced optoelectronic and nanophotonic devices, such as plasmonic nanolasers, plasmon-enhanced light-emitting diodes and solar cells, plasmonic emitters of single photons, and quantum devices operating in infrared and terahertz domains. The combination of surface plasmon resonances in conducting structures, providing strong concentration of an electromagnetic optical field nearby, with sharp optical resonances in semiconductors, which are highly sensitive to external electromagnetic fields, creates a platform to control light on the nanoscale. The design of the composite metal-semiconductor system imposes the consideration of both the plasmonic resonances in metal and the optical transitions in semiconductors - a key issue being their resonant interaction providing a coupling regime. In this book the reader will find descriptions of electrodynamics of conducting structures, quantum physics of semiconductor nanostructures, and guidelines for advanced engineering of metal-semiconductor composites. These constituents form together the physical basics of the metal-semiconductor plasmonics, underlying many effective practical applications. The list of covered topics also includes the review of recent results, such as the achievement of a strong coupling regime, and the preservation of non-classical statistics of photons in plasmonic cavities combined with semiconductor nanostructures.
Author : Haixu Leng
Publisher :
Page : 420 pages
File Size : 41,77 MB
Release : 2018
Category :
ISBN :
One of the reasons why nanoscience is so fascinating is that the size of the nano-systems is "just about right". They are large enough to have various complex properties, and at the same time they are small enough to be treated (calculated) by numerical methods. I studied the interaction between individual gold nanoparticles (in which plasmons are excited) and quantum dots (in which excitons are excited) experimentally and theoretically at the nanoscale. Coupling optical emitters (quantum dots) to plasmon resonances in metal nanostructures has long been investigated as a means to increase their spontaneous emission rates. This increased rate occurs for weak coupling between the emitter and plasmon; for intermediate coupling, a Fano resonance will be seen; under strong coupling, the system undergoes Rabi splitting into new, hybrid modes. To date, efforts at achieving strong coupling between plasmons and single emitters have mostly been studied in scattering measurements; however, Rabi splitting in the scattering spectrum is difficult to distinguish from the Fano interference, or induced transparency, that occurs at intermediate coupling strengths. Here, we report measurements of scattering and photoluminescence from individual coupled plasmon-emitter systems that consist of a single quantum dot in the gap between a gold nanoparticle and a silver film. Splitting of the modes in photoluminescence is a signature of the strong coupling effect. The measurements unambiguously demonstrated weak, intermediate, and strong coupling at room temperature. In a separate study, we found that the photoluminescence of a quantum dot splits into two modes as a nanometer-sized gold tip approaches the quantum dots on a gold substrate. The splitting in both cases was over 150 meV, which exceeded the plasmon cavity loss (definition of the strong coupling). These studies opened up the possibility of single-photon nonlinearities and other extreme light-matter interactions at the nanoscale at room temperature.
Author : Michaela Meyns
Publisher : diplom.de
Page : 211 pages
File Size : 49,82 MB
Release : 2014-06-01
Category : Science
ISBN : 3954897938
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 : Olena Fesenko
Publisher : Springer Nature
Page : 447 pages
File Size : 10,82 MB
Release : 2023-03-01
Category : Science
ISBN : 3031181042
This book highlights some of the latest advances in nanotechnology and nanomaterials from leading researchers in Ukraine, Europe and beyond. It features contributions presented at the 9th International Science and Practice Conference Nanotechnology and Nanomaterials (NANO2021), which was held on August 25–28, 2021 at Lviv Polytechnic National University, and was jointly organized by the Institute of Physics, the National Academy of Sciences of Ukraine, Lviv Polytechnic National University, University of Tartu (Estonia), University of Turin (Italy), Pierre and Marie Curie University (France), European Profiles S.A. (Greece), Representation of the Polish Academy of Sciences in Kyiv, University of Angers (France), Ruprecht Karl University of Heidelberg (Germany). Internationally recognized experts from a wide range of universities and research institutions share their knowledge and key findings on material properties, behavior, and synthesis. This book’s companion volume also addresses topics such as nano-optics, energy storage, and biomedical applications.
Author : Sandip Dhara
Publisher : CRC Press
Page : 281 pages
File Size : 16,30 MB
Release : 2023-03-31
Category : Science
ISBN : 100084577X
This book builds a narrative on the near-field optical and spectroscopic studies with an emphasis on plasmonic- and photonic-assisted nano-optics as a tool for superlensing. Deliberations on near-field studies using confined light in various applications are included along with their commercial implications. Single-molecule detection utilizing efficient surface-enhanced Raman scattering phenomenon in the far-field and plasmonic tip-enhanced Raman scattering studies in the near-field measurements for fast analysis up to trace level is discussed. Features: Covers the broad area of nano-optical spectroscopy from the perspective of putting the concepts and innovations in the field to use Discusses entire spectra of near-field optics and spectroscopy using light Explores gas/chemical sensing using surface plasmon resonance (SPR) in the Kretschmann configuration Includes dielectric nano-photonics and optical confinement Studies phonon behaviour using confined light for the analysis of chemical, biological, and other materials This book is aimed at graduate students and researchers in material science, analytical chemistry, nanotechnology, and electrical engineering.