Download or read book The Formation and Study of Self assembled Monolayers with Molecular Recognition and Catalytic Properties written by David Alan Offord and published by . This book was released on 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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

Download or read book Molecular Self Assembly written by Alex Li Dequan and published by CRC Press. This book was released on 2012-12-20 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past several decades, molecular self-assembly has emerged as one of the main themes in chemistry, biology, and materials science. This book compiles and details cutting-edge research in molecular assemblies ranging from self-organized peptide nanostructures and DNA-chromophore foldamers to supramolecular systems and metal-directed assemblies, even to nanocrystal superparticles and self-assembled microdevices

Download or read book Self Assembly written by Ramanathan Nagarajan and published by John Wiley & Sons. This book was released on 2019-01-07 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to the state-of-the-art of the diverse self-assembly systems Self-Assembly: From Surfactants to Nanoparticles provides an effective entry for new researchers into this exciting field while also giving the state of the art assessment of the diverse self-assembling systems for those already engaged in this research. Over the last twenty years, self-assembly has emerged as a distinct science/technology field, going well beyond the classical surfactant and block copolymer molecules, and encompassing much larger and complex molecular, biomolecular and nanoparticle systems. Within its ten chapters, each contributed by pioneers of the respective research topics, the book: Discusses the fundamental physical chemical principles that govern the formation and properties of self-assembled systems Describes important experimental techniques to characterize the properties of self-assembled systems, particularly the nature of molecular organization and structure at the nano, meso or micro scales. Provides the first exhaustive accounting of self-assembly derived from various kinds of biomolecules including peptides, DNA and proteins. Outlines methods of synthesis and functionalization of self-assembled nanoparticles and the further self-assembly of the nanoparticles into one, two or three dimensional materials. Explores numerous potential applications of self-assembled structures including nanomedicine applications of drug delivery, imaging, molecular diagnostics and theranostics, and design of materials to specification such as smart responsive materials and self-healing materials. Highlights the unifying as well as contrasting features of self-assembly, as we move from surfactant molecules to nanoparticles. Written for students and academic and industrial scientists and engineers, by pioneers of the research field, Self-Assembly: From Surfactants to Nanoparticles is a comprehensive resource on diverse self-assembly systems, that is simultaneously introductory as well as the state of the art.

Download or read book Intermolecular Interactions and Surface Properties of Self Assembled Monolayers of Functional Boron Clusters written by Dominic Pascal Goronzy and published by . This book was released on 2019 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-assembled monolayers (SAMs) are an advantageous platform for probing the fundamental interactions that dictate the spontaneous formation of nanostructures and supramolecular assemblies and directly affect macroscale properties. As such, SAMs provide an avenue for creating surfaces with defined chemical and physical properties. The assembly of these nanoscale constructs is driven by three primary factors: the interface between the substrate and the monolayer, the interactions between the adsorbate molecules, and the interface between the monolayer and the environment. I studied an icosahedral cage boron cluster, the carborane, as a building block for SAMs with properties that we can tune to advantage. Carboranes have several favorable traits, including providing a scaffold for a variety of functional groups. A chalcogenide group, typically a thiol, is used for surface attachment; moreover, bifunctional carboranes also enable control of the valency during assembly and greater reactivity at the environmental interface of the SAM. Additionally, isomers of carboranethiol have distinct dipole moments in terms of orientation and magnitude. The dipoles can lead to the formation of long-range dipole dipole networks within the SAM, which can stabilize the SAM and also modify the surface properties of the material. The rigid, symmetric backbone of the carborane cage results in SAMs that are relatively pristine and defect free. Due to these advantageous traits, carboranes enable the creation of monolayers with tunable interactions at the SAM interfaces. This system not only enables myself and others to study the molecular forces of assembly but also facilitates the simultaneous modification of both chemical and physical properties of surfaces and interfaces. This thesis describes several carborane based surface assemblies and the variable interactions they have within the SAM interfaces. The introduction of a second thiol group to the carborane cage can be used to modulate the interaction of the SAM with the substrate. Carboranedithiol SAMs exhibit two binding modes, a monovalent state and a divalent state. The presence of these two modes enables tuning of valency using acid base chemistry and thus the ratio of singly bound to dual bound surface molecules can be modified during deposition. Another avenue to alter the interactions at the substrate-monolayer interface is to use an alternative functional group for surface attachment. A chalcogenide group similar to thiol is selenol, however carboraneselenolate SAMs have a distinct surface morphology compared to carboranethiolate SAMs. Carboraneselenolate SAMs exhibit a dynamic double lattice where surface molecules appear to switch between high- and low-conductance binding modes. This morphology is consistent with other cage molecule selenolate SAMs and is typically associated with substrate-mediated interactions. In contrast, the carboraneselenolate SAMs are resistant to thermal rearrangement and desorption due to the dipole dipole interactions within the monolayer. Carboranethiols can be modified by adding a carboxylic acid functional group that both alter the interactions within the monolayer and provide a platform for further reactions at the environmental interface. The introduction of a laterally positioned carboxyl functional group increases the steric demands of the molecule, thereby decreasing the packing density, but also enables hydrogen bonding interactions within the monolayer. The pKa of the surface bound carboxylic acid is shifted such that it is approximately two pH units less acidic than in solution. This shift is driven by the dielectric of the environment that the carboxyl group experiences on the surface, which is determined by the intermolecular interactions within the monolayer, partial desolvation, and the proximity to the substrate surface. The carboxyl group also remains available for further chemistry on the surface and can coordinate with a variety of metal ions or be used as an attachment point for performing chemical lift off lithography (CLL). This lithographic technique was performed successfully on several types of carboxyl carboranethiolate SAMs. The use of these SAMs also enabled the characterization of the post CLL substrate surface via scanning tunneling microscopy. This analysis revealed the molecules left behind during the CLL process are either in small molecular islands or sparsely packed, highly mobile molecules. There remain many opportunities for further chemistry to be performed with these carboxyl terminated SAMs or with carboranethiol SAMs with other additional functional groups. Carborane-based SAMs are a versatile system that provides a high degree of tunability at all three interfaces of a SAM. The work presented lays the foundation for further application in lithography, like CLL, as well as the use of these SAMs in organic electronics and devices and as interfacial materials.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tuning Surface Properties Using Self assembled Monolayers for Various Applications written by Yekaterina Leonidovna Lyubarskaya and published by . This book was released on 2014 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The research presented in this dissertation focuses on the study of self-assembled monolayers (SAMs) in the modification of surface properties of different substrates for various applications. Self-assembled monolayers are organic molecules that can be deposited on a variety of surfaces, such as those of metals, metal-oxides, and semiconductors. Formation of SAMs on any inorganic material provides a ubiquitous way to impart desirable chemical and physical properties of organic and biological molecules to the inorganic substrate. It has been demonstrated that single molecules and their self-assembled monolayers can significantly alter the physical and electronic properties of inorganic conductors; moreover, studies have shown that the performance of many electrical devices can be transformed by modifying inorganic electrodes with organic SAMs. This is especially important for the development of next generation of ultra-compact electronic devices, in which the ability to control the interfacial charge-transport with a single monolayer of organic molecules would be ideal. We have developed different organic electronic architectures as test beds for studying the effect of monolayer properties, such as structural and geometrical parameters, on their electronic properties. By using a typical organic electronic device as a sensitive test platform, slight changes in a monolayer property, such as length, have been detected by studying the current- voltage characteristics (JV) of organic diodes functionalized with self-assembled monolayers (SAMs) of varying alkyl chain-length. Next, we describe the application of SAMs based on n-octylphosphonic acid (C8PA) and 1H,1H,2H,2H-perfluorooctanephosphonic acid (PFOPA) as anode buffer layers in C60-based organic photovoltaic (OPV) devices. We used the OPV platform to compare stabilities of organic monolayers exposed to ambient conditions with SAMs positioned inside working OPV devices. We found that the stabilities are different, suggesting the degradation mechanisms are distinct. The degradation of the OPV efficiency with respect to air exposure was significantly reduced with the perfluorinated PFOPA compared to the aliphatic C8PA. We attributed the OPV degradation to moisture diffusion from the top aluminum electrode and we discuss that the lowering of the anode work function is the result of hydrolysis of the SAM buffer layer. Next, we demonstrated the dependence of molecular electronic properties on the functional group substitution and that the changes in these properties can be measured using the organic light-emitting (OLED) platform. Specifically, we compared bilayered organic monomolecular systems immobilized on an inorganic electrode as the charge-injecting components of the organic light emitting diodes (OLEDs). Our bilayered interfaces comprise ordered inert primary and functional reactive layers, and they differ in only one parameter: the molecular structure of the terminal functional group. We demonstrate that we can visualize the differences in the charge transfer dynamics of two bilayered systems via patterned electroluminescence. In addition, we describe a new protocol for the preparation of shape-controlled multicomponent particles comprising metallic (Au and Ti), magnetic (Ni), and oxide (SiO2, TiO2) layers. First, we discuss the application and attractiveness of the colloidal structures, Janus Particles (JPs), that possess two different surfaces, varying either in polarity, hydrophilicity, etc. Next, we present our method for specifically controlling the composition, shape, and size of the micro-JPs. We demonstrate how this protocol permits fabrication of non-symmetrical particles by orthogonally functionalizing their opposite sides using well-established organosilanes and thiol chemistries (based on SAMs). We propose that these colloids may be used as convenient materials for studying non-symmetrical self-assembly at the meso- and micro-scales, due to their unique geometries and surface chemistries"--Pages viii-x.

Download or read book Beyond the Molecular Frontier written by National Research Council and published by National Academies Press. This book was released on 2003-03-19 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry and chemical engineering have changed significantly in the last decade. They have broadened their scopeâ€"into biology, nanotechnology, materials science, computation, and advanced methods of process systems engineering and controlâ€"so much that the programs in most chemistry and chemical engineering departments now barely resemble the classical notion of chemistry. Beyond the Molecular Frontier brings together research, discovery, and invention across the entire spectrum of the chemical sciencesâ€"from fundamental, molecular-level chemistry to large-scale chemical processing technology. This reflects the way the field has evolved, the synergy at universities between research and education in chemistry and chemical engineering, and the way chemists and chemical engineers work together in industry. The astonishing developments in science and engineering during the 20th century have made it possible to dream of new goals that might previously have been considered unthinkable. This book identifies the key opportunities and challenges for the chemical sciences, from basic research to societal needs and from terrorism defense to environmental protection, and it looks at the ways in which chemists and chemical engineers can work together to contribute to an improved future.

Download or read book Polymeric Materials in Organic Synthesis and Catalysis written by Michael R. Buchmeiser and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to describe the synthesis and characterization of the materials used in polymer-supported synthesis. The authors cover not only the classical polymers and their use in homogeneous, heterogeneous and micellar catalysis, but also such new developments as "enzyme-labile linkers", illustrating how to simplify the purification process and avoid waste. The result is a wealth of useful information -- for beginners and experts alike - in one handy reference, removing the need for difficult and time-consuming research among the literature.

Download or read book Molecular Aggregation written by Angelo Gavezzotti and published by OUP Oxford. This book was released on 2007 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title provides a brief but accurate summary of all the basic ideas, theories, methods, and conspicuous results of structure analysis and molecular modelling of the condensed phases of organic compounds.

Download or read book Self assembled Monolayers written by David Jon Revell and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Formation Structural Dynamics and Surface Properties of Thiol gold Self Assembled Monolayers written by David Stephen Karpovich and published by . This book was released on 1996 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Complex Magnetic Nanostructures written by Surender Kumar Sharma and published by Springer. This book was released on 2017-04-04 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a detailed discussion of the complex magnetic behavior of magnetic nanosystems, with its myriad of geometries (e.g. core-shell, heterodimer and dumbbell) and its different applications. It provides a broad overview of the numerous current studies concerned with magnetic nanoparticles, presenting key examples and an in-depth examination of the cutting-edge developments in this field. This contributed volume shares the latest developments in nanomagnetism with a wide audience: from upper undergraduate and graduate students to advanced specialists in both academia and industry. The first three chapters serve as a primer to the more advanced content found later in the book, making it an ideal introductory text for researchers starting in this field. It provides a forum for the critical evaluation of many aspects of complex nanomagnetism that are at the forefront of nanoscience today. It also presents highlights from the extensive literature on the topic, including the latest research in this field.

Download or read book Supramolecular Chemistry in Water written by Stefan Kubik and published by John Wiley & Sons. This book was released on 2019-09-03 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides deep insight into the concepts and recent developments in the area of supramolecular chemistry in water Written by experts in their respective field, this comprehensive reference covers various aspects of supramolecular chemistry in water?from fundamental aspects to applications. It provides readers with a basic introduction to the current understanding of the properties of water and how they influence molecular recognition, and examines the different receptor types available in water and the types of substrates that can be bound. It also looks at areas to where they can be applied, such as materials, optical sensing, medicinal imaging, and catalysis. Supramolecular Chemistry in Water offers five major sections that address important topics like water properties, molecular recognition, association and aggregation phenomena, optical detection and imaging, and supramolecular catalysis. It covers chemistry and physical chemistry of water; water-mediated molecular recognition; peptide and protein receptors; nucleotide receptors; carbohydrate receptors; and ion receptors. The book also teaches readers all about coordination compounds; self-assembled polymers and gels; foldamers; vesicles and micelles; and surface-modified nanoparticles. In addition, it provides in-depth information on indicators and optical probes, as well as probes for medical imaging. -Covers, in a timely manner, an emerging area in chemistry that is growing more important every day -Addresses topics such as molecular recognition, aggregation, catalysis, and more -Offers comprehensive coverage of everything from fundamental aspects of supramolecular chemistry in water to its applications -Edited by one of the leading international scientists in the field Supramolecular Chemistry in Water is a one-stop-resource for all polymer chemists, catalytic chemists, biochemists, water chemists, and physical chemists involved in this growing area of research.

Download or read book Experimental Relations of Gold and Other Metals to Light written by Michael Faraday and published by . This book was released on 1857 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Directing the Assembly of Nanostructures on Surfaces with Molecular Monolayers written by Mohamed Amine Mezour and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The precise organization of nano-objects into well-defined patterns at surfaces and interfaces is of increasing importance in nanoscience research. Among the existing nanopatterning approaches, molecular self-assembly provides a highly accurate, efficient, and potentially low-cost "bottom-up" route to create complex nano-patterns with immense flexibility in terms of nanoscale building blocks. The structure and functionality of molecular building blocks define the type of interactions that are involved in the formation of the molecular pattern and in the templating process. This Thesis combines the high hierarchical order offered by physisorbed self-assembled molecular networks (SAMNs) and the enhanced stability gained from chemisorbed self-assembled monolayers (SAMs). The result is robust and/or versatile 2D molecular monolayers that can be applied to the template-directed formation of organic and inorganic nanostructures. The first part of this Thesis explores the use of a new tridentate thiol for the formation of SAMs with long-term stability on Au(111). This design is based on a benzene ring substituted with three methylthiol groups in alternation with three alkyl chains. The molecular orientation and long-range order of these SAMs depend on the length of the alkyl chains. Physisorbed SAMN for nanopatterning of gold nanoparticles were prepared using a p-dialkoxybenzene SAMN modified-HOPG substrate. The observed templating effect is based on van der Waals interactions between the alkyl chains of the SAMN and AuNP. The assembly efficiency is greatest when these chains are of similar length.The dynamics of C60 assembly onto SAMs of benzenethiols (BT) and penfluorobenzenthiols (PFBT) were been studied. The electronic properties of these SAMs directly affect the growth kinetic of C60 overlayers. The study of physisorbed [C60]fullerene multicarboxylic acids on an Au (111) substrate identifies the important role of molecule-substrate interactions and the intermolecular hydrogen bonding in the formation of a 2D assembly. The possibility of tuning the molecule-Au interaction was demonstrated using a PFBT-modified Au substrate. The dimensionality of the resulting [C60]fullerene multicarboxylic acids monolayer (1D vs 2D) was shown to depend on the number of malonic acid functionalities present. " --