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Structural Characterization Of Self Assembled Monolayers Within Molecular Junctions
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Book Synopsis Structural Characterization of Self-assembled Monolayers Within Molecular Junctions by : Paula Elena Colavita
Download or read book Structural Characterization of Self-assembled Monolayers Within Molecular Junctions written by Paula Elena Colavita and published by . This book was released on 2005 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Formation and Characterization of Molecular Junctions Based on Self-assembled Monolayers on Au and GaAs by : Candra Panglijen
Download or read book Formation and Characterization of Molecular Junctions Based on Self-assembled Monolayers on Au and GaAs written by Candra Panglijen and published by . This book was released on 2006 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization and Study of Molecular Structures of Self-assembled Monolayers by : Venu Gopal R. Kuturu
Download or read book Characterization and Study of Molecular Structures of Self-assembled Monolayers written by Venu Gopal R. Kuturu and published by . This book was released on 2004 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Functionalized Self-assembled Monolayers and Surface-attached Interlocking Molecules Using Near-edge X-ray Absorption Fine Structure Spectroscopy by : Trevor Michael Willey
Download or read book Characterization of Functionalized Self-assembled Monolayers and Surface-attached Interlocking Molecules Using Near-edge X-ray Absorption Fine Structure Spectroscopy written by Trevor Michael Willey and published by . This book was released on 2004 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-assembled Monolayers of Thiols by : Abraham Ulman
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.
Book Synopsis The Electronic Structure of Biomolecular Self-Assembled Monolayers by : Matthaeus Anton Wolak
Download or read book The Electronic Structure of Biomolecular Self-Assembled Monolayers written by Matthaeus Anton Wolak and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies presented here address the characterization of the electronic structure of various self-assembled monolayers (SAMs) of peptide nucleic acid (PNA) and tetraphenylporphyrin (TPP) SAMs and arrays, formed on gold substrates. PNA is a promising alternative to DNA for bio-sensing applications, as well as for strategies for self-assembly based on nucleic acid hybridization. In recent years charge transfer through PNA molecules was a focus of research due to possible applications in self-assembled molecular circuits and molecular tools. In light of this research it is interesting to investigate the electronic structure of PNA interfaces to gold, a potential electrode material. TPP is, due to its electronic structure, an organic p-type molecular semiconductor. Such a material can provide an alternative to standard micro- and optoelectronic devices and in recent years more attention was paid to semiconducting polymers and organic compounds offering these low-cost and flexible alternatives. Therefore, it is of high importance to investigate the prospect of using modified TPP molecules for the formation of interconnected molecular networks on metallic surfaces. All investigated monolayers were formed from solution in a nitrogen atmosphere inside a homemade glove box. This process allowed for PNA SAM and TPP SAM and array formation on clean Au substrates without the exposure to the ambient atmosphere. Ultraviolet and X-ray photoemission spectroscopy (UPS and XPS) measurements on the resulting PNA SAMs and TPP SAMs and arrays, which were performed in a to the glove box attached vacuum chamber containing a photoemission spectrometer, revealed the hole injection barriers at the interfaces and the interface dipoles. In addition to the UPS and XPS measurements on PNA, electronic structure calculations based on molecular dynamics sampling of the PNA structure were obtained, yielding the HOMO-LUMO gap and the electronic density of states for PNA.
Book Synopsis Surface Structure and Stereochemical Properties of Self-assembled Monolayer Materials . Progress Report by :
Download or read book Surface Structure and Stereochemical Properties of Self-assembled Monolayer Materials . Progress Report written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document reports the progress the authors have made in support of their proposal to generate well-characterized, well-ordered organic surfaces and to impinge upon the array of oriented organic molecules a well-collimated beam of radical atoms at a well-defined angle of incidence. Using the intensity of helium atom diffraction from the organic surface as a measure of the number of unreacted molecules at the surface, the authors will measure the rate of the reaction. They will then vary the angle of incidence of the reactive atom beam and repeat the measurement. In this manner they plan to map out the reactivity of the molecules on the surface as a function of the angle of incidence of the reactive moiety. To carry out this experiment requires that two fields of research be brought together: (1) molecular beam technology and (2) the science/art of growing well-ordered organic surfaces. The first half of this report describes recent helium diffraction results from molecular beam deposited organic monolayers (structural layer characterization work). The second half reports progress in constructing and characterizing the reactive atom (oxygen) beam source.
Book Synopsis Materials Nanoarchitectonics by : Katsuhiko Ariga
Download or read book Materials Nanoarchitectonics written by Katsuhiko Ariga and published by Elsevier. This book was released on 2023-12-07 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Nanoarchitectonics: From Integrated Molecular Systems to Advanced Devices provides the latest information on the design and molecular manipulation of self-organized hierarchically structured systems using tailor-made nanoscale materials as structural and functional units. The book is organized into three main sections that focus on molecular design of building blocks and hybrid materials, formation of nanostructures, and applications and devices. Bringing together emerging materials, synthetic aspects, nanostructure strategies, and applications, the book aims to support further progress, by offering different perspectives and a strong interdisciplinary approach to this rapidly growing area of innovation. This is an extremely valuable resource for researchers, advanced students, and scientists in industry, with an interest in nanoarchitectonics, nanostructures, and nanomaterials, or across the areas of nanotechnology, chemistry, surface science, polymer science, electrical engineering, physics, chemical engineering, and materials science. - Offers a nanoarchitectonic perspective on emerging fields, such as metal-organic frameworks, porous polymer materials, or biomimetic nanostructures - Discusses different approaches to utilizing "soft chemistry" as a source for hierarchically organized materials - Offers an interdisciplinary approach to the design and construction of integrated chemical nano systems - Discusses novel approaches towards the creation of complex multiscale architectures
Book Synopsis Self-assembled Monolayers and Multilayers for Molecular Scale Device Applications by : Ernesto R. Soto-Villatoro
Download or read book Self-assembled Monolayers and Multilayers for Molecular Scale Device Applications written by Ernesto R. Soto-Villatoro and published by . This book was released on 2005 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Self-assembled monolayers (SAMs) are organized molecular assemblies that are formed by spontaneous adsorption of a compound in solution to a surface (e.g. alkanethiols on gold). The design, preparation, and characterization of several self-assembled monolayers and multilayers on surfaces (gold, indium tin oxide and quartz) are described. The systems were chosen based on their ability to form ordered films and to perform a given device function. SAMs were fabricated with selected functional groups at the air-monolayer interface, capable of complexing metal ions (e.g. dicarboxypyridine, dicarboxybenzene, imidazole, 4-hydroxypyridine) with the purpose of using these SAMs to construct multilayered films. Deposition of a second layer consisting of metal ions (e.g. Cu(II), Co(II) and Fe(III)), occurs by non-covalent metal ligand binding interactions between the metal ion layer and the different organic ligands on the surface. Deposition of subsequent layers was achieved by the incorporation of the appropriate organic ligands and metal ions. These monolayers and multilayered films were characterized by contact angle measurements, ellipsometry, grazing angle FT-IR, cyclic voltammetry and impedance spectroscopy following deposition of each layer on the film. Electrochemical analysis of the multilayered films shows alternating insulating/conducting behavior (cyclic voltammetry) and alternating changes in films capacitance (impedance spectroscopy) depending on the outermost layer of the film. Films capped with an organic layer show low conductivity, while films capped with a metal layer show conducting behavior. The electrochemical behavior of the films is related to the degree of "leakiness" or electrolyte solution permeation through the film, which is high for films with metal layers as the top layer and decreases once the film is capped with an organic layer. The alternating conducting/insulating behavior of the films allows for fabrication of multilayered thin films of variable thickness and tunable conducting properties. Ordered films were fabricated with up to seven layers of dicarboxypyridine and Cu(II), and 4-hydroxypyridine and Fe(III) metal-ligand units. The construction of these films provides an example of molecular films that could function as molecular wires or junctions due to their controllable electrochemical properties. Photocurrent generating films were fabricated by incorporation of chromophore groups (e.g. pyrene, porphyrins) into the multilayered structures. These films generate cathodic or anodic current upon photoexcitation of the chromophores. The monolayers functionalized with different organic ligands were also used to study lanthanide complexation on the surfaces. Successful deposition of different lanthanide ions was achieved from DMSO solutions. Monolayers of a bicyclic structure, 4, 7, 13, 16-tetraoxa-1,10,21-triaza-bicycle[8.8.5] tricosane-19,23-dione, attached to a hexadecanethiol molecule were used to study the ability of metal ion detection on the surface using electrochemical (cyclic voltammetry and impedance spectroscopy) techniques. The SAMs show higher complexation affinity for Li+ than for Na+ or K+. Preliminary studies were also carried out to investigate the ability of different SAMs to cell adhesion interactions. Future experiments will help elucidate a systematic relation of cell adherence and the bulk and molecular-level properties of the functionalized surfaces. The different multilayered films described in this dissertation served as preliminary models for different molecular scale device applications. Current work is focused in the design and preparation of more efficient photocurrent generating films, highly selective sensors for different types of ions, surfaces for cell adhesion and microbial interactions, and the study of other potential applications such as the design of micro and nanofluidic devices.
Book Synopsis Molecular Electronics by : Ioan Baldea
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
Book Synopsis Handbook of Nanoscale Optics and Electronics by :
Download or read book Handbook of Nanoscale Optics and Electronics written by and published by Academic Press. This book was released on 2010-05-25 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increasing demand for smaller, faster, and more highly integrated optical and electronic devices, as well as extremely sensitive detectors for biomedical and environmental applications, a field called nano-optics or nano-photonics/electronics is emerging – studying the many promising optical properties of nanostructures. Like nanotechnology itself, it is a rapidly evolving and changing field – but because of strong research activity in optical communication and related devices, combined with the intensive work on nanotechnology, nano-optics is shaping up fast to be a field with a promising future. This book serves as a one-stop review of modern nano-optical/photonic and nano-electronic techniques, applications, and developments. - Provides overview of the field of Nano-optics/photonics and electronics, detailing practical examples of photonic technology in a wide range of applications - Discusses photonic systems and devices with mathematical rigor precise enough for design purposes - A one-stop review of modern nano-optical/photonic and nano-electronic techniques, applications, and developments
Book Synopsis 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 by : Naining Yin
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.
Book Synopsis Organic Field-Effect Transistors by : Zhenan Bao
Download or read book Organic Field-Effect Transistors written by Zhenan Bao and published by CRC Press. This book was released on 2018-10-03 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: The remarkable development of organic thin film transistors (OTFTs) has led to their emerging use in active matrix flat-panel displays, radio frequency identification cards, and sensors. Exploring one class of OTFTs, Organic Field-Effect Transistors provides a comprehensive, multidisciplinary survey of the present theory, charge transport studies, synthetic methodology, materials characterization, and current applications of organic field-effect transistors (OFETs). Covering various aspects of OFETs, the book begins with a theoretical description of charge transport in organic semiconductors at the molecular level. It then discusses the current understanding of charge transport in single-crystal devices, small molecules and oligomers, conjugated polymer devices, and charge injection issues in organic transistors. After describing the design rationales and synthetic methodologies used for organic semiconductors and dielectric materials, the book provides an overview of a variety of characterization techniques used to probe interfacial ordering, microstructure, molecular packing, and orientation crucial to device performance. It also describes the different processing techniques for molecules deposited by vacuum and solution, followed by current technological examples that employ OTFTs in their operation. Featuring respected contributors from around the world, this thorough, up-to-date volume presents both the theory behind OFETs and the latest applications of this promising technology.
Book Synopsis Introducing Molecular Electronics by : Gianaurelio Cuniberti
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.
Book Synopsis Characterization of Redox-active Monolayers for Use in Molecular Memory Devices by : Amir Ali Yasseri
Download or read book Characterization of Redox-active Monolayers for Use in Molecular Memory Devices written by Amir Ali Yasseri and published by . This book was released on 2004 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2009 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unimolecular and Supramolecular Electronics I by : Robert M. Metzger
Download or read book Unimolecular and Supramolecular Electronics I written by Robert M. Metzger and published by Springer Science & Business Media. This book was released on 2012-01-10 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charge Transport in Organic Semiconductors, by Heinz Bässler and Anna Köhler. Frontiers of Organic Conductors and Superconductors, by Gunzi Saito and Yukihiro Yoshida. Fullerenes, Carbon Nanotubes, and Graphene for Molecular Electronics, by Julio R. Pinzón, Adrián Villalta-Cerdas and Luis Echegoyen. Current Challenges in Organic Photovoltaic Solar Energy Conversion, by Cody W. Schlenker and Mark E. Thompson.- Molecular Monolayers as Semiconducting Channels in Field Effect Transistors, by Cherie R. Kagan. Issues and Challenges in Vapor-Deposited Top Metal Contacts for Molecule-Based Electronic Devices, by Masato M. Maitani and David L. Allara. Spin Polarized Electron Tunneling and Magnetoresistance in Molecular Junctions, by Greg Szulczewski.
