Download or read book Study of Semiconductor Surfaces Using the Technique of Optical Second Harmonic Generation written by Jar-Mo Chen and published by . This book was released on 1976 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Harmonic Generation is used to detect submonolayers of atoms on solid surfaces. It is shown that nonlinear optical method is much more sensitive than linear reflectance to the surface atoms. A nonlinear optical mixing spectroscopy should be able to detect most of the low lying excitations of a monolayer of atoms adsorbed on solid surfaces. CS of O2 coadsorption on metal and semiconductor surfaces has been studied in detail using LEED, Work function photoemission and Auger spectroscopy. (Author).
Download or read book Application of Optical Second Harmonic Generation to Surface Analysis written by and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding surface and interfacial properties remains a challenging task, particularly when these interfacial regions are under relatively reactive conditions. This is particularly true of semiconductor surfaces which can be highly reactive under ambient or processing conditions. One of the studies to be described in this presentation is our recent work on Si electrode surfaces. In recent years significant progress has been made in characterizing the Si/electrolyte interface by infrared reflectance, ultra-high vacuum UHV transfer experiments, and scanning tunneling microscopy STM and AFM imaging. These studies have taken advantage of the relative stability of Si surface prepared in a hydrogen terminated state. The more usual form in either air or in water is a heavily oxidized Si surface for which much less is known because of the inapplicability of many of the above techniques to examining the Si/SiO2 interfacial region. The presence of the oxide can significantly alter the electrochemistry and the electronic properties of the semiconductor. In this paper we discuss our application of optical second harmonic generation (SHG) to studying the Si/electrolyte and Si/SiO2/electrolyte interfaces for which oxides have been photoanalytically grown on the surface. Si/electrolyte, Semiconductors, SHG.
Download or read book Research in Progress written by and published by . This book was released on 1972 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Semiconductors for Optoelectronics written by Hiroyoshi Naito and published by John Wiley & Sons. This book was released on 2021-08-02 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive coverage of organic electronics, including fundamental theory, basic properties, characterization methods, device physics, and future trends Organic semiconductor materials have vast commercial potential for a wide range of applications, from self-emitting OLED displays and solid-state lighting to plastic electronics and organic solar cells. As research in organic optoelectronic devices continues to expand at an unprecedented rate, organic semiconductors are being applied to flexible displays, biosensors, and other cost-effective green devices in ways not possible with conventional inorganic semiconductors. Organic Semiconductors for Optoelectronics is an up-to-date review of the both the fundamental theory and latest research and development advances in organic semiconductors. Featuring contributions from an international team of experts, this comprehensive volume covers basic properties of organic semiconductors, characterization techniques, device physics, and future trends in organic device development. Detailed chapters provide key information on the device physics of organic field-effect transistors, organic light-emitting diodes, organic solar cells, organic photosensors, and more. This authoritative resource: Provides a clear understanding of the optoelectronic properties of organic semiconductors and their influence to overall device performance Explains the theories behind relevant mechanisms in organic semiconducting materials and in organic devices Discusses current and future trends and challenges in the development of organic optoelectronic devices Reviews electronic properties, device mechanisms, and characterization techniques of organic semiconducting materials Covers theoretical concepts of optical properties of organic semiconductors including fluorescent, phosphorescent, and thermally-assisted delayed fluorescent emitters An important new addition to the Wiley Series in Materials for Electronic & Optoelectronic Applications, Organic Semiconductors for Optoelectronics bridges the gap between advanced books and undergraduate textbooks on semiconductor physics and solid-state physics. It is essential reading for academic researchers, graduate students, and industry professionals involved in organic electronics, materials science, thin film devices, and optoelectronics research and development.
Download or read book Nonlinear Optical Studies of Electronic Properties on Metal and Semiconductor Surfaces written by Chunmao Li and published by . This book was released on 1995 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Characterization of Epitaxial Semiconductor Layers written by Günther Bauer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characterization of epitaxial layers and their surfaces has benefitted a lot from the enormous progress of optical analysis techniques during the last decade. In particular, the dramatic improvement of the structural quality of semiconductor epilayers and heterostructures results to a great deal from the level of sophistication achieved with such analysis techniques. First of all, optical techniques are nondestructive and their sensitivity has been improved to such an extent that nowadays the epilayer analysis can be performed on layers with thicknesses on the atomic scale. Furthermore, the spatial and temporal resolution have been pushed to such limits that real time observation of surface processes during epitaxial growth is possible with techniques like reflectance difference spectroscopy. Of course, optical spectroscopies complement techniques based on the inter action of electrons with matter, but whereas the latter usually require high or ultrahigh vacuum conditions, the former ones can be applied in different environments as well. This advantage could turn out extremely important for a rather technological point of view, i.e. for the surveillance of modern semiconductor processes. Despite the large potential of techniques based on the interaction of electromagnetic waves with surfaces and epilayers, optical techniques are apparently moving only slowly into this area of technology. One reason for this might be that some prejudices still exist regarding their sensitivity.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Application of the Symmetry Properties of Optical Second Harmonic Generation to Studies of Interfaces and Gases written by and published by . This book was released on 1991 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical second harmonic generation has proven to be a powerful tool for studying interfaces. The symmetry properties of the process allow for surface sensitivity not available with other optical methods. In this thesis, we take advantage of these symmetry properties SHG to study a variety of interesting systems not previously studied with this technique. We show that optical second harmonic generation is an effective surface probe with a submonolayer sensitivity for media without inversion symmetry. We demonstrate the technique at a gallium arsenide surface, exploiting the different symmetry properties of the bulk and surface of the crystal to isolate the surface contribution. We also demonstrate that optical second harmonic generation can be used to determine the anisotropic orientational distribution of a surface monolayer of molecules. We apply the technique to study homogeneously aligned liquid crystal cells. To further explore the LC-polymer interface, we used SHG to study the surface memory effect. The surface memory effect is the rendering of an isotropic interface anisotropic by putting it in contact with an anisotropic bulk. Last, we describe some preliminary measurements of a time-resolved spectroscopic study of the phenomenon of second harmonic generation in a gas. The construction of a 500 microjoule pulsed, tunable laser source is described.
Download or read book Ultrafast Phenomena X written by Paul F. Barbara and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented at the Tenth International Conference on Ultrafast Phenomena held at Del Coronado, California, from May 28 to June 1, 1996. The biannual Ultrafast Phenomena Conferences provide a forum for the discussion of the latest advances in ultrafast optics and their applications in science and engineering. The Ultrafast Phenomena Conference maintains a broad international representation with 391 participants from 18 countries, including 94 students attending the conference. The multidisciplinary character of this meeting provides a cross-fertilization of ultrafast concepts and techniques among various scientific and engineering disciplines. The enthusiasm of the paticipants, the originality and quality of the papers that they presented, and the beautiful conference site combined to produce a very successful and enjoyable meeting. Progress was reported in the technology of generating ultrashort pulses, in cluding new techniques for improving laser-pulse duration, output power, wave length range, and compactness. Ultrafast spectroscopy continues to impact on and expand the knowledge base of fundamental processes in physics, chemistry, biol ogy and engineering. In addition ultrafast phenomena now extends to real-world applications in biology, high-speed communication, and material diagnostics. The Tenth Ultrafast Phenomena Conference was highlighted by a 'special event' in which the developments of the previous conferences were reviewed in a panel discussion by G. Mourou, E. Ippen, A. Migus, A. Laubereau and R. Hochstrasser.
Download or read book Developments in Surface Contamination and Cleaning written by Rajiv Kohli and published by Elsevier. This book was released on 2008-01-10 with total page 1209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface contamination is of cardinal importance in a host of technologies and industries, ranging from microelectronics to optics to automotive to biomedical. Thus, the need to understand the causes of surface contamination and their removal is very patent. Generally speaking, there are two broad categories of surface contaminants: film-type and particulates. In the world of shrinking dimensions, such as the ever-decreasing size of microelectronic devices, there is an intensified need to understand the behavior of nanoscale particles and to devise ways to remove them to an acceptable level. Particles which were functionally innocuous a few years ago are ôkiller defectsö today, with serious implications for yield and reliability of the components. This book addresses the sources, detection, characterization and removal of both kinds of contaminants, as well as ways to prevent surfaces from being contaminated. A number of techniques to monitor the level of cleanliness are also discussed. Special emphasis is placed on the behaviour of nanoscale particles. The book is amply referenced and profusely illustrated.• Excellent reference for a host of technologies and industries ranging from microelectronics to optics to automotive to biomedical.• A single source document addressing everything from the sources of contamination to their removal and prevention.• Amply referenced and profusely illustrated.
Download or read book Spectroscopic and Diffraction Techniques in Interfacial Electrochemistry written by C. Gutiérrez and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrochemistry is one of the oldest branches of Physical Chemistry. Having its foundations in the work of Faraday, Arrhenius and others, it evolved from the study of transport in electrolyte solutions to that of electrode kinetics. Kinetic methods are inherently unable to identify unequivocally the species involved in a reaction. Therefore, beginning in the 70s many spectroscopic and diffraction techniques were applied to the study of the electrode-electrolyte interface, in order to identify intermediary reaction species, and even the spatial arrangement of atoms or molecules at the interface. In order to disseminate these techniques, a NATO Advanced Sutdy Institute was held at Puerto de la Cruz, Tenerife (Canary Islands, Spain) from July 2 to 15, 1988. The Institute consisted of tutorial type lecutures, poster sessions, and round-table discussions. It was attended by over 65 participants from NATO-member countries, and others from Argentina and Japan. In the present volume most of the lectures presented at the Institute have been collected. At least one chapter is devoted to each technique. Emphasis has been made on case studies, rather than theory, which can be found in textbooks and other publications. Our purpose in this book is to help the electrochemists uninitiated in spectroscopic methods to decide which techniques would be suitable for application to their particular problems. We thank all the lecturers who contributed to this volume, and even those UHPs (Unrepentant Habitual Procrastinators) who did not in spite of our urgings to do so.
Download or read book Sensors and Their Applications VII Proceedings of the Seventh Conference on Sensors and Their Applications Held in Dublin Ireland 10 13 September 1995 written by A. T. Augousti and published by CRC Press. This book was released on 1995 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the invited and contributed papers presented at the seventh conference in the well-known series of conferences on Sensors and their Applications. The invited review papers provide an overview of developments and the contributed papers give in-depth coverage of research results across the whole field.
Download or read book Liquid Liquid InterfacesTheory and Methods written by Alexander G. Volkov and published by CRC Press. This book was released on 2020-11-26 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Update your knowledge of the chemical, biological, and physical properties of liquid-liquid interfaces with Liquid-Liquid Interfaces: Theory and Methods. This valuable reference presents a broadly based account of current research in liquid-liquid interfaces and is ideal for researchers, teachers, and students. Internationally recognized investigators of electrochemical, biological, and photochemical effects in interfacial phenomena share their own research results and extensively review the results of others working in their area. Because of its unusually wide breadth, this book has something for everyone interested in liquid-liquid interfaces. Topics include interfacial and phase transfer catalysis, electrochemistry and colloidal chemistry, ion and electron transport processes, molecular dynamics, electroanalysis, liquid membranes, emulsions, pharmacology, and artificial photosynthesis. Enlightening discussions explore biotechnological applications, such as drug delivery, separation and purification of nuclear waste, catalysis, mineral extraction processes, and the manufacturing of biosensors and ion-selective electrodes. Liquid-Liquid Interfaces: Theory and Methods is a well-written, informative, one-stop resource that will save you time and energy in your search for the latest information on liquid-liquid interfaces.
Download or read book Surface and Interface Analysis written by Rudolf Holze and published by Springer Science & Business Media. This book was released on 2008-10-08 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: A broad, almost encyclopedic overview of spectroscopic and other analytical techniques useful for investigations of phase boundaries in electrochemistry is presented. The analysis of electrochemical interfaces and interphases on a microscopic, even molecular level, is of central importance for an improved understanding of the structure and dynamics of these phase boundaries. The gained knowledge will be needed for improvements of methods and applications reaching from electrocatalysis, electrochemical energy conversion, biocompatibility of metals, corrosion protection to galvanic surface treatment and finishing. The book provides an overview as complete as possible and enables the reader to choose methods most suitable for tackling his particular task. It is nevertheless compact and does not flood the reader with the details of review papers.
Download or read book Semiconductor Materials Analysis and Fabrication Process Control written by G.M. Crean and published by Elsevier. This book was released on 2012-12-02 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing awareness that the successful implementation of novel material systems and technology steps in the fabrication of microelectronic and optoelectronic devices, is critically dependent on the understanding and control of the materials, the process steps and their interactions. The contributions in this volume demonstrate that characterisation and analysis techniques are an essential support mechanism for research in these fields. Current major research themes are reviewed both in the development and application of diagnostic techniques for advanced materials analysis and fabrication process control. Two distinct trends are elucidated: the emergence and evaluation of sophisticated in situ optical diagnostic techniques such as photoreflectance and spectroellipsometry and the industrial application of ultra-high sensitivity chemical analysis techniques for contamination monitoring. The volume will serve as a useful and timely overview of this increasingly important field.
Download or read book Laser Surface Processing and Characterization written by I.W. Boyd and published by Elsevier. This book was released on 1992-03-09 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contributions in this volume reflect not only the growing understanding of the underlying mechanisms controlling the various reactions in laser surface processing, but also the potential of several developing applications of direct processing. The most notable trend in the field currently is the technique of laser ablation, which is reported in almost a quarter of the papers in this volume. Whilst by no means a new phenomenon, attention has until recent years remained in the area of lithography and UV-sensitive materials. The growth in interest lies in the use of the technique to grow multi-component thin films and multi-layers. A number of papers on the topic of process diagnostics and in-situ measurements are also included. The theme of these annual meetings is centred around the physical and chemical modification of thin films and surfaces induced by the action of photon, ion, neutral, or electron beams in a variety of environments. Consequently these proceedings provide a comprehensive and unified presentation of the latest developments in this field.
Download or read book Magnetic Characterization Techniques for Nanomaterials written by Challa S.S.R. Kumar and published by Springer. This book was released on 2017-04-24 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixth volume of a 40 volume series on nanoscience and nanotechnology, edited by the renowned scientist Challa S.S.R. Kumar. This handbook gives a comprehensive overview about Magnetic Characterization Techniques for Nanomaterials. Modern applications and state-of-the-art techniques are covered and make this volume an essential reading for research scientists in academia and industry.
