Author: Kallol Roy Publisher: Springer Nature ISBN: 3030596273 Category : Technology & Engineering Languages : en Pages : 277
Book Description
This thesis deals with the development and in-depth study of a new class of optoelectronic material platform comprising graphene and MoS_2, in which MoS_2 is used essentially to sensitize graphene and lead to unprecedently high gain and novel opto-electronic memory effects. The results presented here open up the possibility of designing a new class of photosensitive devices which can be utilized in various optoelectronic applications including biomedical sensing, astronomical sensing, optical communications, optical quantum information processing and in applications requiring low intensity photodetection and number resolved single photon detection.
Author: Yang Xu Publisher: John Wiley & Sons ISBN: 3527841008 Category : Technology & Engineering Languages : en Pages : 197
Book Description
Graphene for Post-Moore Silicon Optoelectronics Provides timely coverage of an important research area that is highly relevant to advanced detection and control technology Projecting device performance beyond the scaling limits of Moore’s law requires technologies based on novel materials and device architecture. Due to its excellent electronic, thermal, and optical properties, graphene has emerged as a scalable, low-cost material with enormous integration possibilities for numerous optoelectronic applications. Graphene for Post-Moore Silicon Optoelectronics presents an up-to-date overview of the fundamentals, applications, challenges, and opportunities of integrating graphene and other 2D materials with silicon (Si) technologies. With an emphasis on graphene-silicon (Gr/Si) integrated devices in optoelectronics, this valuable resource also addresses emerging applications such as optoelectronic synaptic devices, optical modulators, and infrared image sensors. The book opens with an introduction to graphene for silicon optoelectronics, followed by chapters describing the growth, transfer, and physics of graphene/silicon junctions. Subsequent chapters each focus on a particular Gr/Si application, including high-performance photodetectors, solar energy harvesting devices, and hybrid waveguide devices. The book concludes by offering perspectives on the future challenges and prospects of Gr/Si optoelectronics, including the emergence of wafer-scale systems and neuromorphic optoelectronics. Illustrates the benefits of graphene-based electronics and hybrid device architectures that incorporate existing Si technology Covers all essential aspects of Gr/Si devices, including material synthesis, device fabrication, system integration, and related physics Summarizes current progress and future challenges of wafer-scale 2D-Si integrated optoelectronic devices Explores a wide range of Gr/Si devices, such as synaptic phototransistors, hybrid waveguide modulators, and graphene thermopile image sensors Graphene for Post-Moore Silicon Optoelectronics is essential reading for materials scientists, electronics engineers, and chemists in both academia and industry working with the next generation of Gr/Si devices.
Author: Mohamad Nasir Mohamad Ibrahim Publisher: Penerbit USM ISBN: 9674618031 Category : Science Languages : en Pages : 178
Book Description
Most of us have been exposed to graphene through the use of pencils since elementary school. After all, pencil leads are made out of graphite, which are graphene layers that are piled on top of each other. Graphene is an excellent material and has stimulated much research interest due to its unique structure and interesting properties. There are several unique and powerful properties exhibited by graphene that makes it suitable for various advanced applications. For example, it is the thinnest material, with a thickness of only one atomic layer. It is also very strong, flexible, has high thermal and electrical conductivity and much more. In addition, it also has special electrical conductor and insulator properties with tunable optical properties. This book covers fundamental and advanced topics related to graphene, including the introduction and history, structure and chemistry, basic properties, and the preparation methods of graphene. Furthermore, graphene nanocomposites, different characterization techniques, as well as the basic and advanced graphene applications are presented within this book in order to provide a broad reference for researchers, scientists, as well as postgraduate and undergraduate students. Additionally, this book contains a special topic related to bio-based graphene which is currently gaining a lot of attention.
Author: Qiong Ma (Ph. D.) Publisher: ISBN: Category : Languages : en Pages : 194
Book Description
Research on van der Waals (vdW) materials (homo- or hetero-) is a rapidly emerging field in condensed matter physics. They are layered structures with strong chemical bonding within layers and relatively weak van der Waals force to combine layers together. This unique layer-bylayer nature makes it easy to exfoliate layers out and at the same time to re-assemble in arbitrary sequences with different combinations. The versatility, flexibility, and relatively low cost of production make the scientific community enthusiastic about their future. In this thesis, I investigate the fundamental physical processes of light-matter interactions in these layered structures, including graphene, boron nitride, transition metal dichalcogenides and heterostructures formed from these materials. My research involves state-of-the-art nanoscale fabrication and microscale photocurrent spectroscopy and imaging. In Chapter 1, 1 will briefly discuss basic physical properties of the vdW materials involved in this thesis and introduce the main nanofabrication and measurement techniques. Chapter 2-4 are about hot electron dynamics and electron-phonon coupling in intrinsic graphene systems, among which Chapter 2 is focusing on the generation mechanism of the photocurrent at the p-n interface, which is demonstrated to have a photothermoelectric origin. This indicates a weak electron-phonon coupling strength in graphene. Chapter 3 is a direct experimental follow-up of the work in Chapter 2 and reveals the dominant electron-phonon coupling mechanism at different temperature and doping regimes. In Chapter 4, I present the observation of anomalous geometric photocurrent patterns in various devices at the charge neutral point. The spatial pattern can be understood as a local photo-generated current near edges being collected by remote electrodes. The anomalous behavior as functions of change density and temperature indicates an interesting regime of energy and charge dynamics. In Chapter 5 and 6, 1 will show the photoresponse of graphene-BN heterostuctures. In graphene-BN stack directly on SiO2, we observed strong photo-induced doping phenomenon, which can be understood as charge transfer from graphene across BN and eventually trapped at the interface between BN and SiO2. By inserting another layer of graphene between BN and SiO2 , we can measure an electrical current after photoexcitation due to such charge transfer. We further studied the competition between this vertical charge transfer and in-plane carrier-carrier scattering in different regimes. In Chapter 7, I will briefly summarize collaborated work with Prof. Dimitri Basov's group on near-field imaging of surface polariton in two-dimensional materials. This technique provides a complementary tool to examine the intriguing light-matter interaction (for large momentum excitations) in low-dimensional materials. Chapter 8 is the outlook, from my own point of view, what more can be done following this thesis.
Author: Yarub Al-Douri Publisher: Woodhead Publishing ISBN: 0323854583 Category : Technology & Engineering Languages : en Pages : 978
Book Description
A comprehensive look combining experimental and theoretical approaches to graphene, nanotubes, and quantum dots-based nanotechnology evaluation and development are including a review of key applications. Graphene, nanotubes, and quantum dots-based nanotechnology review the fundamentals, processing methods, and applications of this key materials system. The topics addressed are comprehensive including synthesis, preparation, both physical and chemical properties, both accepted and novel processing methods, modeling, and simulation. The book provides fundamental information on key properties that impact performance, such as crystal structure and particle size, followed by different methods to analyze, measure, and evaluate graphene, nanotubes, and quantum dots-based nanotechnology and particles. Finally, important applications are covered, including different applications of biomedical, energy, electronics, etc. Graphene, nanotubes, and quantum dots-based nanotechnology is appropriate for those working in the disciplines of nanotechnology, materials science, chemistry, physics, biology, and medicine. Provides a comprehensive overview of key topics both on the experimental side and the theoretical Discusses important properties that impact graphene, nanotubes, and quantum dots performance, processing methods both novel and accepted and important applications Reviews the most relevant applications, such as biomedical, energy, electronics, and materials ones
Author: Bibhu Prasad Swain Publisher: Springer Nature ISBN: 9811683999 Category : Technology & Engineering Languages : en Pages : 460
Book Description
This book presents recent advances in nanostructured biomaterials. It covers the structures and applications of advanced nanostructured biomaterials. The topics covered include overview on biological activities of thiazole derivatives, imidazole derivatives, pyrazole derivatives, tetrazole derivatives, benzimidazole derivatives, oxazole, isoxazoles, etc. The book also covers the topic of nanocarriers as drug delivery vectors. Given the contents, the book will be useful for students, researchers and professionals working in the area of biomaterials and nanomaterials.
Author: Olena Fesenko Publisher: Springer Nature ISBN: 3030519058 Category : Science Languages : en Pages : 763
Book Description
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 7th International Science and Practice Conference Nanotechnology and Nanomaterials (NANO2019), which was held on August 27–30, 2019 at Lviv Polytechnic National University, and was jointly organized by the Institute of Physics of the National Academy of Sciences of Ukraine, University of Tartu (Estonia), University of Turin (Italy), and Pierre and Marie Curie University (France). 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: Zhuo Kang Publisher: John Wiley & Sons ISBN: 3527833870 Category : Technology & Engineering Languages : en Pages : 340
Book Description
Van der Waals Heterostructures A comprehensive resource systematically detailing the developments and applications of van der Waals heterostructures and devices Van der Waals Heterostructures is essential reading to understand the developments made in van der Waals heterostructures and devices in all aspects, from basic synthesis to physical analysis and heterostructures assembling to devices applications, including demonstrated applications of van der Waals heterostructure on electronics, optoelectronics, and energy conversion, such as solar energy, hydrogen energy, batteries, catalysts, biotechnology, and more. This book starts from an in-depth introduction of van der Waals interactions in layered materials and the forming of mixed-dimensional heterostructures via van der Waals force. It then comprehensively summarizes the synthetic methods, devices building processes and physical mechanism of 2D van der Waals heterostructures, and devices including 2D-2D electronics, 2D-2D optoelectronics, and mixed dimensional van der Waals heterostructures. In Van der Waals Heterostructures, readers can expect to find specific information on: The current library of 2D semiconductors and the current synthesis and performances of 2D semiconductors Controllable synthesis and assemble van der Waals heterostructures, physics of the van der Waals interface, and multi-field coupling effects 2D-2D electronics, 2D-2D optoelectronics, mixed dimensional van der Waals heterostructures, and van der Waals heterostructure applications on energy conversion Insight into future perspectives of the van der Waals heterostructures and devices with the detailed effective role of 2D materials for integrated electrical and electronic equipment
Author: I Tan Lin Publisher: ISBN: Category : Languages : en Pages : 120
Book Description
Graphene is a one-atom-thick 2D system that has a unique hexagonal crystal structure of two carbon atoms per unit cell. Unlike any other 2D semiconductor material known today, intrinsic graphene has a zero bandgap with its charged carriers behaving like Dirac fermions with a zero mass, resulting in many extraordinary properties that are very different from other materials. Such properties can be controllably modified by proper impurity doping or by electrical or optical modulation, making graphene extremely attractive for novel device applications. The salient electronic, optical, and optoelectronic properties of graphene, together with its unique nanostructure, offer innovative opportunities to many potentially revolutionary applications for high-speed/high-frequency electronic and optoelectronic devices, terahertz (THz) oscillators and sensors, and ultrafast nonlinear optical elements. Realization of these exciting graphene-based devices, as well as the possibility for further innovation, relies on a good understanding of graphene's electronic, optical and optoelectronic properties in the broad spectral range from THz to the visible. In this thesis, the electronic property of graphene is investigated first, followed by the discussion of THz property of graphene. Based on the derived models of the electronic and THz properties of graphene, we can describe the plasmonic behavior of graphene in various configurations, such as graphene-based THz waveguide. A concept THz device is demonstrated both theoretically and experimentally in the last.
Author: Dominik Eder Publisher: Walter de Gruyter GmbH & Co KG ISBN: 3110377888 Category : Technology & Engineering Languages : en Pages : 543
Book Description
Nanocarbon-Inorganic Hybrids is dedicated exclusively to the new family of functional materials, covering a multidisciplinary research field that combines materials science, chemistry and physics with nanotechnology and applied energy science. It provides a concise introduction into fundamental principles of nanocarbons, defines hybrids and composites, explains the physics behind sustainability, and illustrates requirements for successful implementation in energy applications. It further reviews the current research on developing concepts for designing nanocarbon hybrids, unravels mechanistic details of interfacial electron transfer processes and highlights future challenges and perspectives associated with exploiting these exciting new materials in commercial energy applications and beyond. This comprehensively written book is indispensable for Master and PhD students seeking to become familiar with a modern fi eld of knowledge-driven material science as well as for senior researchers and industrial staff scientists who explore the frontiers of knowledge.
Author: Kallol Roy
Author: Yang Xu
Author: Mohamad Nasir Mohamad Ibrahim
Author: Qiong Ma (Ph. D.)
Author: Yarub Al-Douri
Author: Bibhu Prasad Swain
Author: Olena Fesenko
Author: Zhuo Kang
Author: I Tan Lin
Author: Dominik Eder