Download or read book Non thermal Plasma Synthesis and Passivation of Luminescent Silicon Nanocrystals written by Lorenzo Mangolini and published by . This book was released on 2007 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silicon Nanocrystals written by Lorenzo Pavesi and published by John Wiley & Sons. This book was released on 2010-02-02 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique collection of knowledge represents a comprehensive treatment of the fundamental and practical consequences of size reduction in silicon crystals. This clearly structured reference introduces readers to the optical, electrical and thermal properties of silicon nanocrystals that arise from their greatly reduced dimensions. It covers their synthesis and characterization from both chemical and physical viewpoints, including ion implantation, colloidal synthesis and vapor deposition methods. A major part of the text is devoted to applications in microelectronics as well as photonics and nanobiotechnology, making this of great interest to the high-tech industry.
Download or read book Plasma Application for Synthesis of Novel Nanostructures and Mechanical Properties Investigation written by Alborz Izadi and published by . This book was released on 2020 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, nanomaterials are receiving increasing attention, as they exhibit exciting and useful attributes that can be employed across applications and disciplines range from electronics to drug delivery. This dissertation focuses on two disparate projects, both related to plasma-synthesized nanocrystals. The two projects highlight the unique properties of nanocrystals, and their sustainable synthesis using gas phase approaches. These methods apply non-thermal plasma reactors for nanocrystal synthesis. First, we introduce a plasma-based gas phase method for Gold nanoparticle (AuNPs) synthesis. Second, we use plasma-synthesized Silicon nanocrystals (SiNCs) in bilayer and composite structures with a commonly used elastomer, to investigate the mechanical behavior of the structures in a first-of-its kind investigation. There are many applications for AuNPs due to their interesting optoelectronic properties, such as tunable optical absorption and plasmonic resonance behavior. While synthesis and stabilization of colloidal AuNPs is well-established, new synthesis routes can lead to enhanced versatility of applications for AuNPs, particularly if the methods allow avoidance of solution processes or surfactants. In Chapter 2, we introduce a plasma-based synthesis of AuNPs, using a consumable gold wire and a radiofrequency power source. The AuNPs are monodisperse, with an average diameter of 4 nm. While production yield is low, the narrow size distribution of the AuNPs and the avoidance of solution processing in this method are promising for future syntheses of metal NPs based on plasmas.Next, a comprehensive analysis of the mechanical behavior of SiNC/PDMS systems, using plasma-produced SiNCs has been performed. Chapter 3 details our experimental methods combined with modeling to estimate the mechanical behavior of thin layers of SiNCs on PDMS, as deposited directly onto the PDMS from non-thermal plasma reactor. For the first time we estimated the mechanical behavior of thin films of SiNCs by using the onset of bifurcations as an indicator of their modulus. Next, reaching towards luminescent nanocomposites for applications in luminescent devices, we investigated the optical and mechanical behavior of blended SiNC/PDMS nanocomposites. The results from these investigations, reported in Chapter 3 and Chapter 4, have shed light for the first time on the interactions between SiNCs and PDMS both in bilayer and composite structures, pointing to future optoelectronic and opto-mechanical device applications with predictable properties.Finally, in Chapter 5, we share ongoing projects which will be finalized soon, as well as detailing future work surrounding these ideas. We share our parametric study to uncover the various effects of surface functionality, SiNC layer thickness, and PDMS modulus on the resulting SiNC thin film. Concurrently, we probed the formation of wrinkles and cracks on SiNC film surfaces, which were deposited on pre-stretched PDMS using a finite bending configuration, to examine how instabilities on the thin films can be predicted.
Download or read book Defects in Nanocrystals written by Sergio Pizzini and published by CRC Press. This book was released on 2020-05-11 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Defects in Nanocrystals: Structural and Physico-Chemical Aspects discusses the nature of semiconductor systems and the effect of the size and shape on their thermodynamic and optoelectronic properties at the mesoscopic and nanoscopic levels. The nanostructures considered in this book are individual nanometric crystallites, nanocrystalline films, and nanowires of which the thermodynamic, structural, and optical properties are discussed in detail. The work: Outlines the influence of growth processes on their morphology and structure Describes the benefits of optical spectroscopies in the understanding of the role and nature of defects in nanostructured semiconductors Considers the limits of nanothermodynamics Details the critical role of interfaces in nanostructural behavior Covers the importance of embedding media in the physico-chemical properties of nanostructured semiconductors Explains the negligible role of core point defects vs. surface and interface defects Written for researchers, engineers, and those working in the physical and physicochemical sciences, this work comprehensively details the chemical, structural, and optical properties of semiconductor nanostructures for the development of more powerful and efficient devices.
Download or read book Advances in Silicon Solar Cells written by Shadia Ikhmayies and published by Springer. This book was released on 2018-01-10 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a review of all types of silicon solar cells. The scope includes monocrocrystalline Si solar cells, polycrystalline and amorphous thin-film silicon solar cells, and tandem solar cells. Production, treatment and development of these devices are reviewed. Limitations of these devices, design optimization, testing and fabrication methods are covered. In addition, current status and future prospects for the further development of silicon solar cells are addressed. Special emphasis is given to methods of attaining high efficiency and thereby cost-effective solar power. The aim of the book is to provide the reader with a complete overview about the recent advances in the structure and technology of all generations of silicon solar cells.
Download or read book Nanosilicon written by Anatoly A. Ischenko and published by CRC Press. This book was released on 2014-07-23 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanosilicon: Properties, Synthesis, Applications, Methods of Analysis and Control examines the latest developments on the physics and chemistry of nanosilicon. The book focuses on methods for producing nanosilicon, its electronic and optical properties, research methods to characterize its spectral and structural properties, and its possible applic
Download or read book Synthesis and Luminescent Properties of Silicon Nanocrystals written by Antonio Coyopol-Solis and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, study of silicon-based visible light-emitting devices has increased due to large-scale microelectronic integration. Since then different physical and chemical processes have been performed to convert bulk silicon (Si) into a light-emitting material. From discovery of Photoluminescence (PL) in porous Silicon by Canham, a new field of research was opened in optical properties of the Si nanocrystals (Si-NCs) embedded in a dielectric matrix, such as SRO (silicon-rich oxide) and SRN (silicon-rich nitride). In this respect, SRO films obtained by sputtering technique have proved to be an option for light-emitting capacitors (LECs). For the synthesis of SRO films, growth parameters should be considered; Si-excess, growth temperature and annealing temperature. Such parameters affect generation of radiative defects, distribution of Si-NCs and luminescent properties. In this chapter, we report synthesis, structural and luminescent properties of SRO monolayers and SRO/SiO2 multilayers (MLs) obtained by sputtering technique modifying Si-excess, thickness and thermal treatments.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Surface Modification of Group IV Nanoparticles Using Non thermal Plasmas written by Ozgul Yasar-Inceoglu and published by . This book was released on 2015 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly increasing interest in silicon nanostructures is motivated by important advantages of this material compared to other semiconductors commonly investigated in the broad field of nanotechnology. Silicon nanoparticles are promising materials for many applications such as photovoltaics, transistors, light emitting devices, and energy storage devices.
Download or read book Plasma Processing of Nanomaterials written by R. Mohan Sankaran and published by CRC Press. This book was released on 2011-12-19 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are at a critical evolutionary juncture in the research and development of low-temperature plasmas, which have become essential to synthesizing and processing vital nanoscale materials. More and more industries are increasingly dependent on plasma technology to develop integrated small-scale devices, but physical limits to growth, and other challenges, threaten progress. Plasma Processing of Nanomaterials is an in-depth guide to the art and science of plasma-based chemical processes used to synthesize, process, and modify various classes of nanoscale materials such as nanoparticles, carbon nanotubes, and semiconductor nanowires. Plasma technology enables a wide range of academic and industrial applications in fields including electronics, textiles, automotives, aerospace, and biomedical. A prime example is the semiconductor industry, in which engineers revolutionized microelectronics by using plasmas to deposit and etch thin films and fabricate integrated circuits. An overview of progress and future potential in plasma processing, this reference illustrates key experimental and theoretical aspects by presenting practical examples of: Nanoscale etching/deposition of thin films Catalytic growth of carbon nanotubes and semiconductor nanowires Silicon nanoparticle synthesis Functionalization of carbon nanotubes Self-organized nanostructures Significant advances are expected in nanoelectronics, photovoltaics, and other emerging fields as plasma technology is further optimized to improve the implementation of nanomaterials with well-defined size, shape, and composition. Moving away from the usual focus on wet techniques embraced in chemistry and physics, the author sheds light on pivotal breakthroughs being made by the smaller plasma community. Written for a diverse audience working in fields ranging from nanoelectronics and energy sensors to catalysis and nanomedicine, this resource will help readers improve development and application of nanomaterials in their own work. About the Author: R. Mohan Sankaran received the American Vacuum Society’s 2011 Peter Mark Memorial Award for his outstanding contributions to tandem plasma synthesis.
Download or read book Chemistry of Semiconductors written by Sergio Pizzini and published by Royal Society of Chemistry. This book was released on 2023-11-24 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon, germanium, and compound semiconductors, among which silicon carbide, gallium arsenide and gallium nitride are the most representative examples, play a withstanding role in the world economy, since they were and still are the keys for the advancement of modern microelectronics and optoelectronics, with a wealth of sister technologies relevant for renewable energy solutions and advanced spectroscopy applications. This textbook will cover the synthesis, spectroscopic characterisation and optimisation of semiconductor materials, accounting for the most recent developments in the field of nanomaterials. It will be of great interest for scholars and instructors to have the chance to look at semiconductor science with a basic chemical approach. Homopolar semiconductors (silicon and germanium) are examined first, considering the role of these materials in modern microelectronics and in photovoltaics. Compound semiconductors (for example, carbides, arsenides, tellurides, nitrides) are also discussed in detail, considering that the chemistry of their preparation is even more critical and their role in photonic applications is strategic. Authored by a leading expert in the field, this easily accessible text is appropriate for advanced undergraduates and postgraduates studying materials science and technology.
Download or read book Synthesis Passivation and Charging of Silicon Nanocrystals written by Elizabeth A. Boer and published by . This book was released on 2001 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silicon Photonics IV written by David J. Lockwood and published by Springer Nature. This book was released on 2021-06-08 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fourth book in the series Silicon Photonics gathers together reviews of recent advances in the field of silicon photonics that go beyond already established and applied concepts in this technology. The field of research and development in silicon photonics has moved beyond improvements of integrated circuits fabricated with complementary metal–oxide–semiconductor (CMOS) technology to applications in engineering, physics, chemistry, materials science, biology, and medicine. The chapters provided in this book by experts in their fields thus cover not only new research into the highly desired goal of light production in Group IV materials, but also new measurement regimes and novel technologies, particularly in information processing and telecommunication. The book is suited for graduate students, established scientists, and research engineers who want to update their knowledge in these new topics.
Download or read book Analysis and Application of Silicon Nano particles Produced Via Continuous Flow Non thermal Plasmas written by Thomas David Lopez and published by . This book was released on 2015 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous flow non-thermal plasma reactors are being investigated for their ability to efficiently produce high quality nanoparticles. While many nanomaterials can be produced via continuous flow non-thermal plasma reactors, silicon is of particular interest, due to its abundance and relevance in many energy related fields. Significant gaps still exist in the understanding of the kinetics responsible for particle growth, structural evolution, and surface termination of continuous flow non-thermal plasma reactor produced particles. Particle interaction with plasma radicals results in the heating of the particles, which in turn affects the kinetics of particle growth, structural evolution, and surface termination during synthesis and processing. We have investigated the details of plasma-nanoparticle interaction by using in-flight and in-situ characterization techniques. For the first time, we have measured the temperature of a free-standing particle immersed in a non-equilibrium processing plasma.
Download or read book Vapor phase Synthesis of II VI Semiconductor Nanocrystals and Nanowires written by and published by . This book was released on 2005 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vapor-phase synthesis of II-VI nanocrystals (quantum dots) and nanowires has several advantages over traditional liquid-phase techniques, including purity and better compatibility with existing operations in the microelectronics industry. On the other hand, it makes size control, surface passivation of the nanoparticles and growth orientation of the nanowires a more challenging task. A counterflow jet reactor was modified and used to study the synthesis and the surface passivation of luminescent ZnSe nanocrystals by reacting vapors of dimethylzinc:triethylamine adduct with hydrogen selenide gas (both diluted in hydrogen). Homogeneous nucleation of ZnSe occurs through an irreversible reaction between the precursors. The nuclei subsequently grow by surface reactions and cluster-cluster coalescence to form nanocrystals that exhibit size-dependent luminescence. Surface passivation was achieved by introducing vapors of 1-pentanethiol into the reactor. The thiol vapors do not interfere with the nucleation and growth of the primary nanocrystals, but significantly change the morphology and size of the final coagulated particles collected on TEM grids. The chemisorption of thiol vapors on the surface of the nanocrystals also leads to smaller degradation of the PL intensity after one month. High-quality ZnSe nanowires have been synthesized in a metalorganic chemical vapor deposition reactor. The wires were grown on Si substrates and were formed by using a variety of metal catalysts such as gold, silver, tin, and nickel as growth initiators. Different operating procedures were tested with growth temperatures varying between 300 degree C to 750 degree C trying to uncover the optimum operating conditions. Some of the key advantages of the synthesis of ZnSe nanoparticles in the counterflow jet reactor are the fact that is a continuous process with high purity; has the ability to yield nanocrystals even at room temperature and has the capability to passivate the surface of the nanoparticle surfaces and coat them with functional groups. The advantages of the CVD process are the ability of growing high quality materials, due to the purity of the precursors, the high growth rates at low temperatures and the easy integration with the existing processes in the microelectronic industry.
Download or read book Nanocrystals and Nanostructures written by Claudia Maria Simonescu and published by BoD – Books on Demand. This book was released on 2018-10-17 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocrystals and nanostructures attract a special attention in the recent years due to their various properties and a wide range of applications such as in electrical, optical, optoelectronic, catalytic, medicine, chemo- and biosensing, and environmental protection fields. Although extensive research has been done in the field of nanocrystals, it is considered one growing research field. The main goal of this book is to present the current research activities in the field of nanocrystals and nanostructures covering issues regarding new synthesis methods, self-assembly strategies, characterization techniques, properties, and applications. Interesting reports regarding biomimetic modeling of the biomineralization processes and theoretical models to describe mechanisms of deformation twinning in nanocrystalline and ultrafine-grained materials have been presented. By structuring, approaching, and content, the work may be useful for specialist in the field of nano-/materials science, PhD students, students, and all those interested in this topic of high relevance.
Download or read book Laser Ablation in Liquids written by Guowei Yang and published by CRC Press. This book was released on 2012-02-22 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the fundamental concepts and physical and chemical aspects of pulsed laser ablation of solid targets in liquid environments and its applications in the preparation of nanomaterials and fabrication of nanostructures. The areas of focus include basic thermodynamic and kinetic processes of laser ablation in liquids, and its applic
