Modulating Hot Electron Transfer Between Plasmonic Nanostructures and 2D Semiconductors PDF Download
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Author: Ziying Feng
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
Plasmonic hot electrons are electrons with high kinetic energy, generated from the plasmonic nanostructures. The application of hot electrons has been widely studied in the community of photochemistry and optoelectronics. Many applications like photoelectrochemistry and photodetector involve semiconductors, and these applications are plagued by low hot electron injection efficiency in the metal-semiconductor junctions which hinders the wider applications for the hot electrons. Since the exfoliation of graphene with scotch tape in 2004, two dimensional (2D) materials have been widely studied for their unique properties when the thickness scales down to atomically thin. Transition metal dichalcogenides are a class 2D materials, they are semiconductors, and they have the different band structures with different material compositions. For each type of the transition metal dichalcogenide, its few-layer counterparts have both direct band transition and the indirect band transition, this unique band structure of the few-layer 2D transition metal dichalcogenides opens up the possibilities for studying the relationship between the hot electron injection and the band structure in the metal-semiconductor junction. Inspired by the unique band structure of the 2D semiconductors, we design the structure formed with plasmonic nanostructures and 2D semiconductors as a model system to explore plasmonic hot electron injection process at the metal-semiconductor junction, in which we employ high mobility 2D semiconductor to capture the hot electrons. Due to the high photoluminescence quantum yield WSe2, photoluminescence spectra are sued to probe the hot electron injection mechanism between the gold and few-layer WSe2. We demonstrated that the hot electrons tend to at first inject into the energy lower L point, and then to the K point of the of the few-layer WSe2. Another question considered in this dissertation is how to modulate the hot electron injection to improve hot electron collection in the semiconductor. We employed self-assembled monolayer alkane thiols with different chain lengths as the interlayer, and polymethyl methacrylate (PMMA) as protection layer to tune hot electron transfer process. The insight derived provides valuable guidance for the rational design and performance optimization of the relevant plasmonic hot electron devices.
Author: Ziying Feng
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
Plasmonic hot electrons are electrons with high kinetic energy, generated from the plasmonic nanostructures. The application of hot electrons has been widely studied in the community of photochemistry and optoelectronics. Many applications like photoelectrochemistry and photodetector involve semiconductors, and these applications are plagued by low hot electron injection efficiency in the metal-semiconductor junctions which hinders the wider applications for the hot electrons. Since the exfoliation of graphene with scotch tape in 2004, two dimensional (2D) materials have been widely studied for their unique properties when the thickness scales down to atomically thin. Transition metal dichalcogenides are a class 2D materials, they are semiconductors, and they have the different band structures with different material compositions. For each type of the transition metal dichalcogenide, its few-layer counterparts have both direct band transition and the indirect band transition, this unique band structure of the few-layer 2D transition metal dichalcogenides opens up the possibilities for studying the relationship between the hot electron injection and the band structure in the metal-semiconductor junction. Inspired by the unique band structure of the 2D semiconductors, we design the structure formed with plasmonic nanostructures and 2D semiconductors as a model system to explore plasmonic hot electron injection process at the metal-semiconductor junction, in which we employ high mobility 2D semiconductor to capture the hot electrons. Due to the high photoluminescence quantum yield WSe2, photoluminescence spectra are sued to probe the hot electron injection mechanism between the gold and few-layer WSe2. We demonstrated that the hot electrons tend to at first inject into the energy lower L point, and then to the K point of the of the few-layer WSe2. Another question considered in this dissertation is how to modulate the hot electron injection to improve hot electron collection in the semiconductor. We employed self-assembled monolayer alkane thiols with different chain lengths as the interlayer, and polymethyl methacrylate (PMMA) as protection layer to tune hot electron transfer process. The insight derived provides valuable guidance for the rational design and performance optimization of the relevant plasmonic hot electron devices.
Author: Caixia Kan
Publisher: John Wiley & Sons
ISBN: 3527840842
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: Pedro H.C. Camargo
Publisher: John Wiley & Sons
ISBN: 352734750X
Category : Technology & Engineering
Languages : en
Pages : 354
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Book Description
Explore this comprehensive discussion of the foundational and advanced topics in plasmonic catalysis from two leaders in the field Plasmonic Catalysis: From Fundamentals to Applications delivers a thorough treatment of plasmonic catalysis, from its theoretical foundations to myriad applications in industry and academia. In addition to the fundamentals, the book covers the theory, properties, synthesis, and various reaction types of plasmonic catalysis. It also covers its applications in reactions including oxidation, reduction, nitrogen fixation, CO2 reduction, and more. The book characterizes plasmonic catalytic systems and describes their properties, tackling the integration of conventional methods as well as new methods able to unravel the optical, electronic, and chemical properties of these systems. It also describes the fundamentals of controlled synthesis of metal nanoparticles relevant to plasmonic catalysis, as well as practical examples thereof. Plasmonic Catalysis covers a wide variety of other practical topics in the field, including hydrogenation reactions and the harvesting of LSPR-excited charge carriers. Readers will also benefit from the inclusion of: A thorough introduction to plasmonic catalysis, a theory of plasmons for catalysis and mechanisms, as well as optical properties of plasmonic-catalytic nanostructures An exploration of the synthesis of plasmonic nanoparticles for photo and electro catalysis, as well as plasmonic catalysis towards oxidation reactions and hydrogenation reactions Discussions of plasmonic catalysis for multi-electron processes and artificial photosynthesis and N2 fixation An examination of control over reaction selectivity in plasmonic catalysis Perfect for catalytic chemists, materials scientists, photochemists, and physical chemists, Plasmonic Catalysis: From Fundamentals to Applications will also earn a place in the libraries of physicists who seek a one-stop resource to enhance their understanding of applications in plasmonic catalysis.
Author: Mohammad Karbalaei Akbari
Publisher: CRC Press
ISBN: 1000072525
Category : Technology & Engineering
Languages : en
Pages : 277
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Book Description
Offering perspective on both the scientific and engineering aspects of 2D semiconductors, Ultrathin Two-Dimensional Semiconductors for Novel Electronic Applications discusses how to successfully engineer 2D materials for practical applications. It also covers several novel topics regarding 2D semiconductors which have not yet been discussed in any other publications. Features: Provides comprehensive information and data about wafer-scale deposition of 2D semiconductors, ranging from scientific discussions up to the planning of experiments and reliability testing of the fabricated samples Precisely discusses wafer-scale ALD and CVD of 2D semiconductors and investigates various aspects of deposition techniques Covers the new group of 2D materials synthesized from surface oxide of liquid metals and also explains the device fabrication and post-treatment of these 2D nanostructures Addresses a wide range of scientific and practical applications of 2D semiconductors and electronic and optoelectronic devices based on these nanostructures Offers novel coverage of 2D heterostructures and heterointerfaces and provides practical information about fabrication and application of these heterostructures Introduces the latest advancement in fabrication of novel memristors, artificial synapses and sensorimotor devices based on 2D semiconductors This work offers practical information valuable for engineering applications that will appeal to researchers, academics, and scientists working with and interested in developing an array of semiconductor electronic devices.
Author: Drew Forrest DeJarnette
Publisher:
ISBN: 9781303936159
Category : Hot carriers
Languages : en
Pages : 266
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Book Description
Light incident on metal nanoparticles induce localized surface oscillations of conductive electrons, called plasmons, which is a means to control and manipulate light. Excited plasmons decay as either thermal energy as absorbed phonons or electromagnetic energy as scattered photons. An additional decay pathway for plasmons can exist for gold nanoparticles situated on graphene. Excited plasmons can decay directly to the graphene as through hot electron transfer. This dissertation begins by computational analysis of plasmon resonance energy and bandwidth as a function of particle size, shape, and dielectric environment in addition to diffractive coupled in lattices creating a Fano resonance. With this knowledge, plasmon resonance was probed with incident electrons using electron energy loss spectroscopy in a transmission electron microscope. Nanoparticles were fabricated using electron beam lithography on 50 nanometer thick silicon nitride with some particles fabricated with a graphene layer between the silicon nitride and metal structure. Plasmon resonance was compared between ellipses on and off graphene to characterize hot electron transfer as a means of plasmon decay. It was observed that the presence of graphene caused plasmon energy to decrease by as much as 9.8% and bandwidth to increase by 25%. Assuming the increased bandwidth was solely from electron transfer as an additional plasmon decay route, a 20% efficiency of plasmon decay to graphene was calculated for the particular ellipses analyzed.
Author: Jingbo Li
Publisher: John Wiley & Sons
ISBN: 3527344969
Category : Technology & Engineering
Languages : en
Pages : 192
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Book Description
In-depth overview of two-dimensional semiconductors from theoretical studies, properties to emerging applications! Two-dimensional (2D) materials have attracted enormous attention due to their exotic properties deriving from their ultrathin dimensions. 2D materials, such as graphene, transition metal dichalcogenides, transition metal oxides, black phosphorus and boron nitride, exhibit versatile optical, electronic, catalytic and mechanical properties, thus can be used in a wide range of applications, including electronics, optoelectronics and optical applications. Two-Dimensional Semiconductors: Synthesis, Physical Properties and Applications provides an in-depth view of 2D semiconductors from theoretical studies, properties to applications, taking into account the current state of research and development. It introduces various preparation methods and describes in detail the physical properties of 2D semiconductors including 2D alloys and heterostructures. The covered applications include, but are not limited to, field-effect transistors, spintronics, solar cells, photodetectors, light-emitting diode, sensors and bioelectronics. * Highly topical: 2D materials are a rapidly advancing field that attracts increasing attention * Concise overview: covers theoretical studies, preparation methods, physical properties, potential applications, the challenges and opportunities * Application oriented: focuses on 2D semiconductors that can be used in various applications such as field-effect transistors, solar cells, sensors and bioelectronics * Highly relevant: newcomers as well as experienced researchers in the field of 2D materials will benefit from this book Two-Dimensional Semiconductors: Synthesis, Physical Properties and Applications is written for materials scientists, semiconductor and solid state physicists, electrical engineers, and readers working in the semiconductor industry.
Author: Valeri V. Afanas'ev
Publisher: Elsevier
ISBN: 0080999301
Category : Science
Languages : en
Pages : 404
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Book Description
The second edition of Internal Photoemission Spectroscopy thoroughly updates this vital, practical guide to internal photoemission (IPE) phenomena and measurements. The book's discussion of fundamental physical and technical aspects of IPE spectroscopic applications is supplemented by an extended overview of recent experimental results in swiftly advancing research fields. These include the development of insulating materials for advanced SiMOS technology, metal gate materials, development of heterostructures based on high-mobility semiconductors, and more. Recent results concerning the band structure of important interfaces in novel materials are covered as well. Internal photoemission involves the physics of charge carrier photoemission from one solid to another, and different spectroscopic applications of this phenomenon to solid state heterojunctions. This technique complements conventional external photoemission spectroscopy by analyzing interfaces separated from the sample surface by a layer of a different solid or liquid. Internal photoemission provides the most straightforward, reliable information regarding the energy spectrum of electron states at interfaces. At the same time, the method enables the analysis of heterostructures relevant to modern micro- and nano-electronic devices as well as new materials involved in their design and fabrication. - First complete model description of the internal photoemission phenomena - Overview of the most reliable energy barrier determination procedures and trap characterization methods - Overview of the most recent results on band structure of high-permittivity insulating materials and their interfaces with semiconductors and metals
Author: Mark L. Brongersma
Publisher: Springer
ISBN: 1402043333
Category : Science
Languages : en
Pages : 270
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Book Description
This book discusses a new class of photonic devices, known as surface plasmon nanophotonic structures. The book highlights several exciting new discoveries, while providing a clear discussion of the underlying physics, the nanofabrication issues, and the materials considerations involved in designing plasmonic devices with new functionality. Chapters written by the leaders in the field of plasmonics provide a solid background to each topic.
Author: Satyabrata Mohapatra
Publisher: Elsevier
ISBN: 0128141352
Category : Technology & Engineering
Languages : en
Pages : 675
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Book Description
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: Phaedon Avouris
Publisher: Cambridge University Press
ISBN: 1316738132
Category : Technology & Engineering
Languages : en
Pages : 521
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Book Description
Learn about the most recent advances in 2D materials with this comprehensive and accessible text. Providing all the necessary materials science and physics background, leading experts discuss the fundamental properties of a wide range of 2D materials, and their potential applications in electronic, optoelectronic and photonic devices. Several important classes of materials are covered, from more established ones such as graphene, hexagonal boron nitride, and transition metal dichalcogenides, to new and emerging materials such as black phosphorus, silicene, and germanene. Readers will gain an in-depth understanding of the electronic structure and optical, thermal, mechanical, vibrational, spin and plasmonic properties of each material, as well as the different techniques that can be used for their synthesis. Presenting a unified perspective on 2D materials, this is an excellent resource for graduate students, researchers and practitioners working in nanotechnology, nanoelectronics, nanophotonics, condensed matter physics, and chemistry.
