Download or read book Density Controlled Carbon Nanotube Array Electrodes written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CNT materials comprising aligned carbon nanotubes (CNTs) with pre-determined site densities, catalyst substrate materials for obtaining them and methods for forming aligned CNTs with controllable densities on such catalyst substrate materials are described. The fabrication of films comprising site-density controlled vertically aligned CNT arrays of the invention with variable field emission characteristics, whereby the field emission properties of the films are controlled by independently varying the length of CNTs in the aligned array within the film or by independently varying inter-tubule spacing of the CNTs within the array (site density) are disclosed. The fabrication of microelectrode arrays (MEAs) formed utilizing the carbon nanotube material of the invention is also described.
Download or read book Gated Carbon Nanotube Pillar Arrays for High Current Applications written by and published by . This book was released on 2008 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes (CNTs) are attractive electron sources because of their mechanical stability, high electrical conductivity, and low turn-on fields. These properties make CNTs attractive candidates for a number of possible applications, in particular, those requiring high current densities such as travelling wave tube amplifiers and electric propulsion systems. In addition to high emission current density, a generally desirable operational parameter of cathodes is low electron extraction voltage. This is achievable with an array of emitters in which each of the emitters is fabricated with its own extracting electrode at a close distance. This concept has been previously developed for microfabricated Si cathodes. Similar cathode structures have been investigated for carbon nanostructure emitters, however, a number of challenges have been insurmountable, namely the inability to fabricate an individual CNT array in a controlled manner. This limitation has hindered the success of such cathode structures. To address this issue, in this work, we will introduce an integrated gated array of controlled CNT cathodes based on our previously demonstrated, highly stable carbon nanotube pillar array. A detailed fabrication process for this cathode structure will also be presented.
Download or read book Carbon Nanotubes written by Mohammed Rahman and published by BoD – Books on Demand. This book was released on 2018-04-26 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Carbon Nanotubes - Recent Progress contains a number of recent researches on synthesis, growth, characterization, development, and potential applications on carbon materials especially CNTs in nanoscale. It is a promising novel research from top to bottom that has received a lot of interest in the last few decades. It covers the advanced topics on the physical, chemical, and potential applications of CNTs. Here, the interesting reports on cutting-edge science and technology related to synthesis, morphology, control, hybridization, and prospective applications of CNTs are concluded. This potentially unique work offers various approaches on the R
Download or read book Methodology Morphology and Optimization of Carbon Nanotube Growth for Improved Energy Storage in a Double Layer Capacitor written by Daniel Chung-Ming Ku and published by . This book was released on 2009 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this thesis is to optimize the growth of carbon nanotubes (CNTs) on a conducting substrate for use as an electrode to improve energy density in a double-layer capacitor. The focus has been on several areas, such as substrate material, growth conditions, catalyst variations, and thin-film deposition techniques in order to achieve growth of a high density, vertically-aligned carbon nanotube array suitable for use as an electrode. This thesis describes the methodology of modifying a significant number of parameters in order to achieve all of the targeted electrode specifications, with the exception of nanotube density. The successful growth of a CNT array on an aluminum foil substrate marks an important milestone for realizing a future commercial product.
Download or read book Biosensors in Food Processing Safety and Quality Control written by Mehmet Mutlu and published by CRC Press. This book was released on 2016-04-19 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details the latest developments in sensing technology and its applications in the food industry, profiling the improvements achieved in recent years for better food quality, safety, processing, and control. Topics discussed include the use of biosensors for the assessment of natural toxins in food and for pesticides and foodborne pathogen
Download or read book Electrochemistry of Carbon Electrodes written by Richard C. Alkire and published by John Wiley & Sons. This book was released on 2016-03-31 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book sets the standard on carbon materials for electrode design. For the first time, the leading experts in this field summarize the preparation techniques and specific characteristics together with established and potential applications of the different types of carbon-based electrodes. An introductory chapter on the properties of carbon together with chapters on the electrochemical characteristics and properties of the different modifications of carbon such as carbon nanotubes, graphene, carbon fiber, diamond or highly ordered pyrolytic graphite provide the reader with the basics on this fascinating and ubiquitous electrode material. Cutting-edge technologies such as carbon electrodes in efficient supercapacitors, Li-ion batteries and fuel cells, or electrodes prepared by screen-printing are discussed, giving a complete but concise overview about the topic. The clearly structured book helps newcomers to grasp easily the principles of carbon-based electrodes, while researchers in fundamental and applied electrochemistry will find new ideas for further research on related key technologies.
Download or read book Fabrication and Characterization of a High density Carbon Nanotube Microelectrode Array for Use in an Epiretinal Prosthesis written by Adam Khalifa and published by . This book was released on 2013 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aligned Carbon Nanotubes written by Zhifeng Ren and published by Springer Science & Business Media. This book was released on 2012-09-05 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a survey of the physics and fabrication of carbon nanotubes and their applications in optics, electronics, chemistry and biotechnology. It focuses on the structural characterization of various carbon nanotubes, fabrication of vertically or parallel aligned carbon nanotubes on substrates or in composites, physical properties for their alignment, and applications of aligned carbon nanotubes in field emission, optical antennas, light transmission, solar cells, chemical devices, bio-devices, and many others. Major fabrication methods are illustrated in detail, particularly the most widely used PECVD growth technique on which various device integration schemes are based, followed by applications such as electrical interconnects, nanodiodes, optical antennas, and nanocoax solar cells, whereas current limitations and challenges are also be discussed to lay the foundation for future developments.
Download or read book Supercapacitors for the Next Generation written by Daisuke Tashima and published by BoD – Books on Demand. This book was released on 2022-03-09 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercapacitors are presently applied in various devices and have the potential to be used in many fields in the future. For example, the use of supercapacitors is currently limited not only to automobiles, buses, and trucks, which have been electrified recently, but also to railways and aircraft. We believe that these devices are the most suitable physical batteries for absorbing regenerative energy produced during motor regeneration; thus, further research and development in this direction is expected in the future.
Download or read book Fabrication and Transport Studies of N type OFETS Using Aligned Array Carbon Nanotubes Electrodes written by Edwards G. Jimenez and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present fabrication of n-type organic field effect transistors (OFETs) using densely aligned array carbon nanotube (CNT) electrodes. The CNTs were aligned with a high linear density via dielectrophoresis (DEP) from an aqueous solution. In order to fabricate the CNT electrodes, aligned CNTs were cut by using electron beam lithography (EBL) and precise oxygen plasma etching. The n-type OFETs were fabricated in a bottom-contact configuration by depositing a thin film of C60 molecules between the CNT source and drain electrodes, and compared against a controlled C60 OFET with gold electrodes. The electron transport measurements of the OFETs using CNT electrodes show better transistor characteristics compared to OFETs using gold electrodes due to improved charge injection from densely aligned and open-ended nanotube tips.
Download or read book Dekker Encyclopedia of Nanoscience and Nanotechnology written by James A. Schwarz and published by CRC Press. This book was released on 2004 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrochemical Charge Storage and Transfer in Carbon Nanostructures written by Rajaram Narayanan and published by . This book was released on 2016 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prospect of bridging the large energy density of batteries to the power densities of Electrochemical Capacitors (ECs) was explored. It has been demonstrated that nanostructuring of carbon electrodes significantly decrease the electrochemical capacitance of ECs due to density of states (DOS) related quantum and space charge effects. It is shown that the controlled generation of defects via Argo based plasma processing can substantially increase the electrochemical capacitance of a model nanostructured carbon electrode such as few layer graphene. Detailed consideration of the quantum and space charge capacitance was used delineate a new length scale, correlated to the active defects contributing to the enhanced capacitance and was found to be smaller than a structural correlation length determined through Raman spectroscopy. The study offers insight into a scalable method to improve the energy density of ECs. An alternate approach to improving energy density and power density is shown via the use of redox additive electrolyte in macroporous carbon electrodes. The enhanced energy and power densities are initially, demonstrated on a model macroporous electrode such as vertically aligned carbon nanotube (CNT) arrays and then on a three-dimensional, hierarchically porous, reticulated vitreous carbon electrode with aligned CNTs within its macropores. Having demonstrated complete energy utilization at high current densities, cyclability studies were also conducted to test the longevity of the electrode system. Electrochemical kinetics is investigated at the interface of single layer graphene and a redox electrolyte as an aqueous solution of potassium ferricyanide. It has been demonstrated that graphene's variable DOS substantially alters the kinetics of electron transfer. It is shown that the kinetics does not follow the classic Butler-Volmer model but a modified Marcus-Hush-Chidsey model incorporating variable DOS. The thesis is then concluded by summarizing the themes and findings presented in this work.
Download or read book Supercapacitor Design and Applications written by Zoran Stevic and published by BoD – Books on Demand. This book was released on 2016-11-02 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, authors investigated asymmetric and symmetric supercapacitor configurations for different electrode materials. Besides the already standard activated carbon (AC), studies were done with other materials and technologies for their preparation and activation. Also, the research info was presented with different electrolytes in order to obtain a higher capacitance and potential window, with as small as possible serial resistance. Achieved high performance enables wide application, and some of the new applications (spacecraft power systems, powering heart pacemakers and wireless sensors) are also described in this book.
Download or read book Syntheses and Applications of Carbon Nanotubes and Their Composites written by Satoru Suzuki and published by BoD – Books on Demand. This book was released on 2013-05-09 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes are rolled up graphene sheets with a quasi-one-dimensional structure of nanometer-scale diameter. In these last twenty years, carbon nanotubes have attracted much attention from physicists, chemists, material scientists, and electronic device engineers, because of their excellent structural, electronic, optical, chemical and mechanical properties. More recently, demand for innovative industrial applications of carbon nanotubes is increasing. This book covers recent research topics regarding syntheses techniques of carbon nanotubes and nanotube-based composites, and their applications. The chapters in this book will be helpful to many students, engineers and researchers working in the field of carbon nanotubes.
Download or read book Engineering the Bioelectronic Interface written by Jason J. Davis and published by Royal Society of Chemistry. This book was released on 2009 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interfacing of man-made electronics with redox proteins and enzymes not only tells us a great deal about the levels of sophistication active in biology, but also paves the way to using it in derived sensory devices. Some of these have already had a profound impact on both clinical diagnostics and the quality of life enjoyed by those unfortunate enough to live with disease. Though much remains to be learnt about controlling and optimising these interfacial interactions, their potential uses are, if anything, growing. Written by leaders in the field, this is the only book to focus on the generation of biosensing interfaces with analyses and control at the molecular level. Some of these are enzyme based, others associated with the generation of surfaces for protein-protein recognition. Summaries of state-of-the-art investigations into the interfacing of structurally complex molecular species with electrode surfaces are included along with their design, analysis and potential application. Studies into the "wiring" of biomolecules to man-made surfaces through the use of delocalised "molecular wires" or carbon nanotubes are detailed as are the application of surface chemical and genetic engineering methods to the construction of robust, orientated biomolecular monolayers.
Download or read book Carbon Based Nanomaterials for Advanced Thermal and Electrochemical Energy Storage and Conversion written by Rajib Paul and published by Elsevier. This book was released on 2019-07-20 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Based Nanomaterials for Advanced Thermal and Electrochemical Energy Storage and Conversion presents a comprehensive overview of recent theoretical and experimental developments and prospects on carbon-based nanomaterials for thermal, solar and electrochemical energy conversion, along with their storage applications for both laboratory and industrial perspectives. Large growth in human populations has led to seminal growth in global energy consumption, hence fossil fuel usage has increased, as have unwanted greenhouse gases, including carbon dioxide, which results in critical environmental concerns. This book discusses this growing problem, aligning carbon nanomaterials as a solution because of their structural diversity and electronic, thermal and mechanical properties. - Provides an overview on state-of-the-art carbon nanomaterials and key requirements for applications of carbon materials towards efficient energy storage and conversion - Presents an updated and comprehensive review of recent work and the theoretical aspects on electrochemistry - Includes discussions on the industrial production of carbon-based materials for energy applications, along with insights from industrial experts
Download or read book Carbon Nanotubes written by M. Meyyappan and published by CRC Press. This book was released on 2004-07-28 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes, with their extraordinary mechanical and unique electronic properties, have garnered much attention in the past five years. With a broad range of potential applications including nanoelectronics, composites, chemical sensors, biosensors, microscopy, nanoelectromechanical systems, and many more, the scientific community is more moti
