Download or read book Nanogap Electrodes written by Tao Li and published by John Wiley & Sons. This book was released on 2021-07-14 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique in its scope, this book comprehensively combines various synthesis strategies with applications for nanogap electrodes. Clearly divided into four parts, the monograph begins with an introduction to molecular electronics and electron transport in molecular junctions, before moving on to a whole section devoted to synthesis and characterization. The third part looks at applications with single molecules or self-assembled monolayers, and the whole is rounded off with a section on interesting phenomena observed using molecular-based devices.
Download or read book Nanogap Electrodes for Molecular Electronics and Biosensing written by Ismael Rattalino and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanogap Structures for Molecular Electronics and Biosensing written by Alice Dimonte and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assembly of Molecular Nanomagnets Into Nanogap Electrodes by Dielectrophoresis Realization of Bioelectronic Devices for Electrical Measurement of Ionic Current Through Membrane Protein Channels written by Yaser Vaheb and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis consists of two parts. The two parts correspond to two different subjects but with a common feature which is the fabrication of nanometer scale devices for low current measurements. The first part investigated the assembly of Prussian blue and Cs-Co-Cr Prussian blue analogue molecular nanomagnets into nano-patterned electrodes. The ever growing need for higher performance processors and higher storage densities has pushed the CMOS technology commonly used in industry to its physical limitations toward its miniaturization. Molecular electronics and molecular spintronics prove to be promising alternatives for the CMOS in future nanoelectronic devices. Pd or Au gaps with ~ 7-50 nm width were fabricated on a Si/SiO2 substrate using standard electron beam lithography, metal deposition and lift-off. Nanomagnets were positioned between the gaps via AC dielectrophoresis (DEP). At room temperature, the Cs-Co-Cr Prussian blue analogue nanoparticles exhibited negligible current whereas junction with Prussian blue nanoparticles exhibited ~ 30 pA at ~ 1 V. Water trapped in nanogaps was found to seriously alter current measurements. This problem was solved by heating samples prior to measurements. A simplified DEP simulation program using Delphi was developed, which neglected Brownian motion and fluid dynamics but allowed us to better understand the DEP process. The second part of the thesis investigated the fabrication of devices for measuring electrical currents through membrane protein channels. Membrane-embedded protein channels are the basis of various physiological processes like nervous communication, muscular contraction, tactile sensation, and so on. Electrical measurements are used in different applications such as drug screening in pharmaceutical industry and biosensors. The standard method to perform such measurements is the use of patch-clamp. However, this method requires intense skill and heavy equipment while it exhibits low measurement efficiency. A solution to these drawbacks is the development of planar patch clamps, which are scalable, automated and easier to use. The first device fabrication step was the patterning of Au/Ag electrodes on thermally oxidized Si substrate by optical lithography, metallization and lift-off. Secondly, a passivation layer of Si3N4/SiO2 was deposited on top of electrodes by PECVD. Then micro-holes were formed inside the Si3N4/SiO2 passivation layer stack using Raith-150 e-beam lithography and reactive ion etching. Finally, Ag layer was converted to AgCl using bleach. The test of electrical current was done using Axopatch patch-clamp amplifier. Current versus time measurements for different voltages were recorded without membrane covering the holes, and an electrical model has been developed for the fabricated devices.
Download or read book Solid State Electronics and Photonics in Biology and Medicine 4 written by Y.-L. Wang and published by The Electrochemical Society. This book was released on 2017 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanogap Electrodes written by Tao Li and published by John Wiley & Sons. This book was released on 2021-08-16 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique in its scope, this book comprehensively combines various synthesis strategies with applications for nanogap electrodes. Clearly divided into four parts, the monograph begins with an introduction to molecular electronics and electron transport in molecular junctions, before moving on to a whole section devoted to synthesis and characterization. The third part looks at applications with single molecules or self-assembled monolayers, and the whole is rounded off with a section on interesting phenomena observed using molecular-based devices.
Download or read book Nanoparticles in Analytical and Medical Devices written by Fang Gang and published by Elsevier. This book was released on 2020-09-01 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoparticles in Analytical and Medical Devices presents the latest information on the use of nanoparticles for a diverse range of analytical and medical applications. Covers basic principles, proper use of nanoparticles in analytical and medical applications, and recent progress in the field. This comprehensive reference helps readers grasp the full potential of nanoparticles in their analytical research or medical practice. Chapters on cutting-edge topics bring readers up to date on the latest research and usage of nanoparticles, and a chapter on commercially available devices that utilize nanoparticles guides readers in overcoming issues with marketing biodevices. Synthesizes nanoparticle conjugation and other critical methods Covers nanoparticles in analytical methods and real analytical devices currently used in the medical field Provides useful new information not covered in the current literature in chapters on surface chemical functionalization for bio-immobilization and nanoparticle production from natural sources
Download or read book Molecular Scale Electronics written by Xuefeng Guo and published by John Wiley & Sons. This book was released on 2020-08-31 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides in-depth knowledge on molecular electronics and emphasizes the techniques for designing molecular junctions with controlled functionalities This comprehensive book covers the major advances with the most general applicability in the field of molecular electronic devices. It emphasizes new insights into the development of efficient platform methodologies for building such reliable devices with desired functionalities through the combination of programmed bottom-up self-assembly and sophisticated top-down device fabrication. It also helps to develop an understanding of the device fabrication processes and the characteristics of the resulting electrode-molecule interface. Beginning with an introduction to the subject, Molecular-Scale Electronics: Concept, Fabrication and Applications offers full chapter coverage on topics such as: Metal Electrodes for Molecular Electronics; Carbon Electrodes for Molecular Electronics; Other Electrodes for Molecular Electronics; Novel Phenomena in Single-Molecule Junctions; and Supramolecular Interactions in Single-Molecule Junctions. Other chapters discuss Theoretical Aspects for Electron Transport through Molecular Junctions; Characterization Techniques for Molecular Electronics; and Integrating Molecular Functionalities into Electrical Circuits. The book finishes with a summary of the primary challenges facing the field and offers an outlook at its future. * Summarizes a number of different approaches for forming molecular-scale junctions and discusses various experimental techniques for examining these nanoscale circuits in detail * Gives overview of characterization techniques and theoretical simulations for molecular electronics * Highlights the major contributions and new concepts of integrating molecular functionalities into electrical circuits * Provides a critical discussion of limitations and main challenges that still exist for the development of molecular electronics * Suited for readers studying or doing research in the broad fields of Nano/molecular electronics and other device-related fields Molecular-Scale Electronics is an excellent book for materials scientists, electrochemists, electronics engineers, physical chemists, polymer chemists, and solid-state chemists. It will also benefit physicists, semiconductor physicists, engineering scientists, and surface chemists.
Download or read book Bioelectrochemistry written by Richard C. Alkire and published by John Wiley & Sons. This book was released on 2013-09-25 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioelectrochemistry is a fast growing field at the interface between electrochemistry and other sciences such as biochemistry, analytical chemistry and medicinal chemistry. In the recent years, the methods and the understanding of the fundamentals have seen significant progress, which has led to rapid development in the field. Here, the expert editors have carefully selected contributions to best reflect the latest developments in this hot and rapidly growing interdisciplinary topic. The resulting excellent and timely overview of this multifaceted field covers recent methodological advances, as well as a range of new applications for analytical detection, drug screening, tumor therapy, and for energy conversion in biofuel cells. This book is a must-have for all Electrochemists, Biochemists, Analytical Chemists, and Medicinal Chemists.
Download or read book Single Molecule Electronics and Nanofabrication of Molecular Electronic Devices written by Senthil Arun Rajagopal and published by . This book was released on 2006 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular electronics is an emerging field that makes it possible to build electronic devices with single molecules as their active element. The conductivity of single molecules can be manipulated to perform functions similar to present-day bulk electronic devices. These single molecules, with a size of few nano-meters, can be designed and chemically synthesized with tailored electronic structures. This thesis focuses on the design, fabrication and measurement of nanogap electronic devices. The enabling device to study the conductivity of dimetal paddlewheel inorganic complexes, using electrode pairs with nanometer separation is fabricated. A study of these inorganic complexes would provide more versatile opportunities for tailoring electron transport properties. The molecular complex and its electron transport mechanism are discussed and a detailed description of the fabrication of the nano-gap electrode with a controlled gap size is provided. Electron beam lithography fabrication techniques are discussed in detail. A reliable method to fabricate a controlled nanogap with electrodeposition and electromigration is demonstrated. The results of I-V curves of gaps are used to estimate the nanogap dimensions via comparison to tunneling current theory.
Download or read book Handbook of Single Molecule Electronics written by Kasper Moth-Poulsen and published by CRC Press. This book was released on 2016-01-05 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single-molecule electronics has evolved as a vibrant research field during the last two decades. The vision is to be able to create electronic components at the highest level of miniaturization-the single molecule. This book compiles and details cutting-edge research with contributions from chemists, physicists, theoreticians, and engineers. It cov
Download or read book Handbook of Bioelectronics written by Sandro Carrara and published by Cambridge University Press. This book was released on 2015-08-06 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This wide-ranging summary of bioelectronics provides the state of the art in electronics integrated and interfaced with biological systems in one single book. It is a perfect reference for those involved in developing future distributed diagnostic devices, from smart bio-phones that will monitor our health status to new electronic devices serving our bodies and embedded in our clothes or under our skin. All chapters are written by pioneers and authorities in the key branches of bioelectronics and provide examples of real-word applications and step-by-step design details. Through expert guidance, you will learn how to design complex circuits whilst cutting design time and cost and avoiding mistakes, misunderstandings, and pitfalls. An exhaustive set of recently developed devices is also covered, providing the implementation details and inspiration for innovating new solutions and devices. This all-inclusive reference is ideal for researchers in electronics, bio/nanotechnology, and applied physics, as well as circuit and system-level designers in industry.
Download or read book Single Molecule Sensing Beyond Fluorescence written by Warwick Bowen and published by Springer Nature. This book was released on 2022-03-01 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an interesting snapshot of recent advances in the field of single molecule nanosensing. The ability to sense single molecules, and to precisely monitor and control their motion is crucial to build a microscopic understanding of key processes in nature, from protein folding to chemical reactions. Recently a range of new techniques have been developed that allow single molecule sensing and control without the use of fluorescent labels. This volume provides an overview of recent advances that take advantage of micro- and nanoscale sensing technologies and provide the prospect for rapid future progress. The book endeavors to provide basic introductions to key techniques, recent research highlights, and an outlook on big challenges in the field and where it will go in future. It is a valuable contribution to the field of single molecule nanosensing and it will be of great interest to graduates and researchers working in this topic.
Download or read book Organic Optoelectronics written by Wenping Hu and published by John Wiley & Sons. This book was released on 2012-11-05 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by internationally recognized experts in the field with academic as well as industrial experience, this book concisely yet systematically covers all aspects of the topic. The monograph focuses on the optoelectronic behavior of organic solids and their application in new optoelectronic devices. It covers organic field-effect and organic electroluminescent materials and devices, organic photonics, materials and devices, as well as organic solids in photo absorption and energy conversion. Much emphasis is laid on the preparation of functional materials and the fabrication of devices, from materials synthesis and purification, to physicochemical properties and the basic processes and working principles of the devices. The only book to cover fundamentals, applications, and the latest research results, this is a handy reference for both researchers and those new to the field. From the contents: * Electronic process in organic solids * Organic/polymeric semiconductors for field-effect transistors * Organic/polymeric field-effect transistors * Organic circuits and organic single molecular transistors * Polymer light-emitting Diodes (PLEDs): devices and materials * Organic solids for photonics * Organic photonic devices * Organic solar cells based on small molecules * Polymer solar cells * Dye-sensitized solar cells (DSSCs) * Organic thermoelectric power devices
Download or read book Advanced Graphene Nanostructures for Biosensing Applications written by Trupti Madhukar Terse and published by . This book was released on 2016 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene is a sp[superscript 2] hybridized carbon, arranged perfectly in a honeycomb structure to form a 2D monolayer of graphitic structure. It has become a popular choice in the development of electrochemical/electrical biosensor devices due to its large surface area, faster electron transfer kinetics, tunable band gap and ultrahigh charge carrier mobility with ballistic electron transport. The goal of this work is to synthesize advanced graphene nanostructures with improved electrical and physiochemical properties suitable for the development of ultrasensitive electrical/electrochemical biosensors. In the first project, seamless graphene-carbon nanotubes (G-CNT) hybrid film was synthesized using a two-step chemical vapor deposition (CVD) method where carbon nanotubes (CNTs) are grown on already grown graphene film on copper foil using iron as a catalyst. This three-dimensional G-CNT hybrid film has been studied for its potential in achieving direct electron transfer (DET) of glucose oxidase (GOx) and its bioelectrocatalytic activity in glucose detection. The DET between GOx and electrochemically oxidized G-CNT electrode was studied using cyclic voltammetry which showed a pair of well-defined and quasi-reversible redox peaks with a formal potential of--459 mV at pH 7 corresponding to redox site of GOx. The constructed electrode detected glucose concentration over the clinically relevant range with the highest sensitivity compared to reported composite hybrid electrodes of graphene oxide and CNTs. G-CNT structure used in this work has potential to be used for development of artificial mediatorless redox enzymatic biosensors and biofuel cell. In the second project, an electrical transduction based biosensor platform for detection of biomolecular interaction using a graphene nanogap electrode has been developed. Different nanofabrication methods including focused ion beam milling (FIB), nanoidentation and E-Beam lithography (EBL) were studied in achieving reproducible planar nanogap electrodes of width less than 100 nm. Electrical biosensing concept was tested on nanogap electrodes using a high affinity interaction of streptavidin- biotin. Sensor performance was further optimized for achieving the high sensitive detection of streptavidin. The detection capability of this biosensor can be tuned down to the single to few molecules. Proposed biosensor platform can be used for any detection based on biomolecules affinity interaction such as for antigen-antibody or chemo-selective interaction with full potential to be used as a portable point-of-use biosensor.
Download or read book Surface Characterization of Organic and Bioinspired Nanoscale Devices written by Kuo-Yao Lin and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past few decades, the research and industrial application of organic semiconducting materials has been very active. Compared to traditional semiconducting materials, facile chemical modification and processing are advantageous properties of organic electronics. This dissertation focuses on two classes of organic semiconducting devices: light-emitting electrochemical cells (LEECs) and bioinspired nanowires. Organic light-emitting diodes (OLEDs) have emerged in display applications, but not lighting due to high fabrication costs. To achieve high OLED performance at low cost, efforts have focused on light-emitting electrochemical cells (LEECs). LEECs, and particularly iridium LEECs, exhibit substantial efficiency, high luminance, and long lifetime in a simple, solution processable device architecture. Performance is facilitated by the redistribution of ions that assists charge injection. However, the physics of iridium LEECs has not been fully explored, particularly brightness enhancement with lithium additives. Scanning Kelvin Probe Microscopy (SKPM) was used to reveal the surface potential profile of iridium LEEC devices and clarify the effect of lithium addition. We found that ions do not pack densely at the cathode in pristine iridium LEECs devices. Li[PF6] addition produced a doubling of the peak electric field at the cathode from an increase of ionic space charge. This work was the first to clarify the nature of iridium device performance and enhancement from lithium salt additives: the additional mobile cations improves space charge accumulation for improved electron injection. The second class of devices concerns nanowires, specifically, the DNA-inspired self-assembly of nanoscale electronic devices. There is a need to fabricate nanoscale electronics with high yield and high purity. We created devices based on 20 nm long DNA nanowires incorporating a perylene-3,4,9,10-tetracarboxylic diimide (PTCDI) derivative, an organic semiconductor with dimensions similar to two DNA bases. We synthesized these nanowires by automated DNA phosphoramidite chemistry and purified these wires by high performance liquid chromatography, thus achieving high control and purity of a nanoscale electronic element. We patterned gold nanogap electrodes and assembled the nanowires by gold-thiol self-assembly. Current voltage characterization revealed that the current of perylene nanowires was enhanced 4.4 fold over conventional DNA nanowires. Temperature dependence revealed that the current increased from room temperature up to 35 °C for each type of wire, and then lowered rapidly, consistent with DNA melting. We performed atomic force microscopy imaging studies to observe an instance of a single nanowire spanning a nanogap. This research provides a new approach to fabricate nanoscale devices with lower cost and high yield. Chapter 1 will serve as an introduction to organic semiconductor fundamentals and applications. Chapter 2 will discuss the state-of-the-art lithographic fabrication methods and the progress of molecular electronics, including research with DNA nanowires. Chapter 3 describes our research in performing surface characterization of iridium light-emitting electrochemical cells and the effect of lithium additives. Finally, the construction of bioinspired nanowire devices with the organic semiconductor perylene and associated electronic, thermal, and surface characterization is reported in Chapter 4.
