Download or read book Studies of the Structural and Electronic Properties of Self assembled Monolayers written by Richard Lloyd Carroll and published by . This book was released on 2001 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: STM, I/V behaviors, NDR.

Download or read book Studies of the Structural and Electronic Properties of Self Assembled Monolayers Towards Molecular Electronics written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of Molecular Electronics (ME) is growing at a rapid pace. The study of materials that have utility at the level of several, or single, molecules is exciting becausethe development of these sorts of systems offers a pathway to potentially avoid the perils of continually shrinking Silicon-based fabrication. This work examines the state of the art in fabrication techniques for semiconductor systems, then examines current examples of ME to be found in the academic literature. This review is designed to plumb the depths of a few important demonstrations, as opposed to a broad overview of the entire body of work. Further, scanning probe lithography techniques are demonstrated that allow for the study of small ensembles of interesting molecules in isolation. By utilizing these techniques, the structural and electronic properties of molecules can be studied, with a focus towards determining the likely utility of a particular species in a ME framework. Experimental study of redox-active self-assembled monolayer (SAM) films shows that under specific conditions, some films display a negative differential resistance (NDR) response that has possible utility in the development of ME devices. Ferrocene- and galvinol-terminated SAMs both show NDR at room temperature. A possible mechanism for the NDR behavior is believed to be resonant tunneling through low-lying, accessible redox-states in the molecule.

Download or read book Molecular Electronics written by Ari Aviram and published by . This book was released on 1998 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores the resurgence of interest in the field of molecular electronics in view of recent advances in such areas as molecular wires, molecular components, fabrication, and assemblies of molecular scale devices and their wiring on surfaces. It shows how molecular electronics offer scientists an opportunity to study and understand a new class of materials, on the molecular level and in isolation, while offering to engineers a new microelectronics technology.

Download or read book Ferrocenes as Potential Building Blocks for Molecular Electronics written by Lars Müller-Meskamp and published by Forschungszentrum Jülich. This book was released on 2008 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introducing Molecular Electronics written by Gianaurelio Cuniberti and published by Springer. This book was released on 2006-05-21 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Klaus von Klitzing Max-Planck-Institut fur ̈ Festk ̈ orperforschung, Heisenbergstraße 1, 70569 Stuttgart, Germany Already many Cassandras have prematurely announced the end of the silicon roadmap and yet, conventional semiconductor-based transistors have been continuously shrinking at a pace which has brought us to nowadays cheap and powerful microelectronics. However it is clear that the traditional scaling laws cannot be applied if unwanted tunnel phenomena or ballistic transport dominate the device properties. It is generally expected, that a combination of silicon CMOS devices with molecular structure will dominate the ?eld of nanoelectronics in 20 years. The visionary ideas of atomic- or molecular-scale electronics already date back thirty years but only recently advanced nanotechnology, including e.g. scanning tunneling methods and mechanically controllable break junctions, have enabled to make distinct progress in this direction. On the level of f- damentalresearch,stateofthearttechniquesallowtomanipulate,imageand probechargetransportthroughuni-molecularsystemsinanincreasinglyc- trolled way. Hence, molecular electronics is reaching a stage of trustable and reproducible experiments. This has lead to a variety of physical and chemical phenomena recently observed for charge currents owing through molecular junctions, posing new challenges to theory. As a result a still increasing n- ber of open questions determines the future agenda in this ?eld.

Download or read book Self assembled Monolayers of Thiols written by Abraham Ulman and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work looks at thin films and self-assembled monolayers of thiols. It is aimed at researchers in chemistry, materials science, electrical engineering, biology and condensed matter physics.

Download or read book Introduction to Electronic Properties and Dynamics of Organic Complexes as Self Assembled Monolayers written by Maddalena Pedio and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-assembled monolayers (SAMs) of organic-conjugated transition metal complexes on surfaces is a focus of both device engineering and basic science, since it is a key factor in nearly all important aspects of device performances, including operation voltages, degradation, and efficiency. The huge amount of literature results related to the first monolayer, and reorganization and self-assembling processes are due to the general accepted result that structural and chemical properties of the first monolayer are the key parameters for controlled thin film growth. Optical and magneto-electronic properties are intimately connected, and the accurate determination of electronic levels, excitation, and relaxation dynamics is mandatory for the optimization of electronic, photovoltaic, and opto-electronic devices. Quite a number of electronic states is generated by the interaction of light with complex organic molecules. Time-resolved spectroscopies are a new investigation tool that gives the possibility of correctly addressing their origin and life time. Examples of prototypical systems are presented and discussed. We review on complementary techniques, trying to single out how different approaches are fundamental to fully characterize these complex systems.

Download or read book Self Assembly and Electronic Properties of Conjugated Molecules Towards Mono Molecular Electronics written by Frank Jäckel and published by . This book was released on 2005 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural and Electronic Properties of Self assembled Molecular Layers at the Organic metal Interface written by Hendrik Glowatzki and published by . This book was released on 2009 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Probing the Electronic Properties of Materials that Self Assemble written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing methods to control the chemistry of surfaces on the 1--100 nm length scale is a fundamental and exciting challenge in many disciplines of science today because it opens new possibilities in fields ranging from molecular electronics (ME) to biomedicine to catalysis. Scanning probe microscopy techniques have been a key goal in achieving this challenge. This work begins with an exhaustive review of scanning probe lithography techniques using self-assembled monolayer (SAM) systems reported in the literature to date. Experimental study describes the development of a scanning probe lithography technique (termed replacement lithography) in which an STM tip selectively desorbs organothiolate SAMs in a predefined pattern, allowing a replacement thiol to adsorb onto the exposed gold in the patterned region. The replacement parameters were investigated using electroactive containing replacement thiol species because they displayed large apparent height contrasts in STM images, allowing the efficacy of the pattern to be easily ascertained. These data were subsequently employed to create mesoscale chemical gradients with replacement lithography. The electronic properties of redox active SAMs were also shown to display negative differential resistance in current-voltage measurements, a behavior that has possible utility in the development of ME devices. Temporal investigations monitoring the stochastic variation in apparent height contrasts in STM images of electroactive containing SAM guest species isolated within insulating host SAM matrices was also studied. The observations from these data may lend insight to how ME candidates might behave when sandwiched in a two-electrode configuration (metal-SAM-metal junction).

Download or read book Molecular Electronics written by Ioan Baldea and published by CRC Press. This book was released on 2016-01-05 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular electronics, an emerging research field at the border of physics, chemistry, and material sciences, has attracted great interest in the last decade. To achieve the ultimate goal of designing molecular electronic devices with the desired functionality and experimental manipulation at the single-molecule level, theoretical understanding of

Download or read book The Production and Characterization of Hierarchical Micro nanostructures of Self assembled Monolayers and Langmuir Blodgett Film Via Atomic Force Microscopy and Its Application in Cellular Signaling Study and Organic Conductive Thin Film written by Naining Yin and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis research focus has two parts. First, production and characterization of hierarchical micro/nanostructures of self-assembled monolayers and Langmuir-Blodgett film utilizing atomic force microscopy (AFM) was investigated. Second, application of these micro/nanostructures in cellular signaling study and organic conductive thin film was demonstrated. Three milestones have been achieved: 1) High-resolution atomic force microscopy (AFM) and AFM-based nanografting were utilized to characterize Dinitrophenyl (DNP) terminated self-assembled monolayers (SAMs) at the nanometer scale. DNP SAMs were prepared in dimethylformamide (DMF), dicholoromethane (DCM), 5% DMF in sec-butanol, 5% DCM in sec-butanol and 5% DMF in ethanol solvents to elucidate the effect of solvents on DNP SAMs packing and local structures. Individual DNP domain was visualized. Quantification analysis of height, molecular packing, domain size and distribution were performed at the nanometer scale. We found that height and packing of DNP SAMs were greatly affected by solvents. Diverse DNP SAMs local structures such as domain height, shape and separation from different solvents were illustrated. Understanding DNP SAM structure shall offer valuable structural insight for developing more effective antigen-antibody binding and regulating further cellular signaling event. 2) Oligothiophene thin films have been considered as a promising material for molecular electronics due to their desirable electronic properties and high structural stability under ambient conditions. To ensure performance in devices, the functional structures such as individual ordered domains, must be stable under practical operational conditions or environments including exposure to various media. This thesis investigates the structure of oligothiophene Langmuir-Blodgett (LB) films upon exposure to liquid media such as water, ethanol (EtOH), and mixed tetrahydrofuran (THF)/EtOH solutions. The LB films form islands ranging from 500 nm up to 1 ℗æm consisting of densely packed oligothiophene molecules. These islands are surrounded by bare substrate and loosely packed adsorbates. In-situ and time-dependent AFM images were acquired to reveal the structural evolution, from which degradation pathways and kinetics are extracted. Degradation of these LB films initiates and propagates from intra-island defect sites, such as cracks and pin holds, whereas the edges of islands remain intact on the surface. The observations appear to be in contrast to the known degradation mechanism among self-assembled monolayers, such as alkanethiols on gold, which initiates and progresses at domain boundaries. Rationale for the observed degradation processes will also be discussed. 3) Nanografting non-conductive organic molecules OEG onto D5TBA LB film on hydrophilic modified Au was successfully demonstrated for the first time. Height of D5TBA LB film on Au is around 2.5 nm, which is consistent with height of D5TBA on mica/Si. Friction of D5TBA island is lower than the substrate. Lateral conductivity of D5TBA LB film on hydrophilic Au was observed and consistent with the one on Si wafer. Geometry and line density of OEG nanostructures can be engineered by changing nanografting parameters, which could be as a promising platform for regulating lateral charge transport of D5TBA.

Download or read book Substituted Coronenes for Molecular Electronics written by Peter Kowalzik and published by Forschungszentrum Jülich. This book was released on 2010 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Electronics written by Juan Carlos Cuevas and published by World Scientific. This book was released on 2010 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the rapidly developing field of molecular electronics. It focuses on our present understanding of the electrical conduction in single-molecule circuits and provides a thorough introduction to the experimental techniques and theoretical concepts. It will also constitute as the first textbook-like introduction to both the experiment and theory of electronic transport through single atoms and molecules. In this sense, this publication will prove invaluable to both researchers and students interested in the field of nanoelectronics and nanoscience in general. Molecular Electronics is self-contained and unified in its presentation. It may be used as a textbook on nanoelectronics by graduate students and advanced undergraduates studying physics and chemistry. In addition, included are previously unpublished material that will help researchers gain a deeper understanding into the basic concepts involved in the field of molecular electronics.

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 Unimolecular and Supramolecular Electronics II written by Robert M. Metzger and published by Springer Science & Business Media. This book was released on 2012-01-10 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: G. C. Solomon C. Herrmann M. A. Ratner Molecular Electronic Junction Transport: Some Pathways and Some Ideas R. M. Metzger D. L. Mattern Unimolecular Electronic Devices B. Branchi F. C. Simeone M. A. Rampi Active and Non-Active Large-Area Metal–Molecules–Metal Junctions C. Li A. Mishchenko T. Wandlowski Charge Transport in Single Molecular Junctions at the Solid/Liquid Interface K. W. Hipps Tunneling Spectroscopy of Organic Monolayers and Single Molecules N. Renaud M. Hliwa C. Joachim Single Molecule Logical Devices

Download or read book Handbook of Self Assembled Semiconductor Nanostructures for Novel Devices in Photonics and Electronics written by Mohamed Henini and published by Elsevier. This book was released on 2011-07-28 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt: The self-assembled nanostructured materials described in this book offer a number of advantages over conventional material technologies in a wide range of sectors. World leaders in the field of self-organisation of nanostructures review the current status of research and development in the field, and give an account of the formation, properties, and self-organisation of semiconductor nanostructures. Chapters on structural, electronic and optical properties, and devices based on self-organised nanostructures are also included. Future research work on self-assembled nanostructures will connect diverse areas of material science, physics, chemistry, electronics and optoelectronics. This book will provide an excellent starting point for workers entering the field and a useful reference to the nanostructured materials research community. It will be useful to any scientist who is involved in nanotechnology and those wishing to gain a view of what is possible with modern fabrication technology. Mohamed Henini is a Professor of Applied Physics at the University of Nottingham. He has authored and co-authored over 750 papers in international journals and conference proceedings and is the founder of two international conferences. He is the Editor-in-Chief of Microelectronics Journal and has edited three previous Elsevier books. - Contributors are world leaders in the field - Brings together all the factors which are essential in self-organisation of quantum nanostructures - Reviews the current status of research and development in self-organised nanostructured materials - Provides a ready source of information on a wide range of topics - Useful to any scientist who is involved in nanotechnology - Excellent starting point for workers entering the field - Serves as an excellent reference manual