Molecular Scale Materials Assembly Investigated by Atomic Force Microscopy PDF Download

Author: Kang Rae Cho
Publisher:
ISBN:
Category :
Languages : en
Pages : 316

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Author: Bhanu P. Jena
Publisher: CRC Press
ISBN: 9814411795
Category : Medical
Languages : en
Pages : 398

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Book Description
This book provides a comprehensive understanding of the discovery of a new cellular structure the "porosome," which is the universal secretory machinery in cells; the protein assembly, biomineralization, and biomolecular interactions; the molecular evolution of protein structure; the use of magnetic nanoparticles for transformative application in medicine and therapy, and the new and novel imaging approach of electrical impedance spectroscopy in biology. It be used for college courses in nanomedicine, nano cell biology, advanced nanotechnology, and biotechnology at the undergraduate and graduate level.

Author: Hjalti Skúlason
Publisher:
ISBN:
Category : Intermolecular forces
Languages : en
Pages : 536

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"The phenomenon of adhesion appears in various applications of everyday life, ranging from PostIt NotesTM and Scotch TapeTM, to the assembly of aircraft and space shuttles. However, adhesion on the molecular scale is fundamentally different from the adhesion that we experience in the macroscopic world. While macroscopic objects require special adhesives or glues to bind them together, microsca1e and nanoscale objects and molecules commonly have a high affinity to adhere to each other. A detailed description of intermolecular forces is therefore of key importance in order to understand a wide range of phenomena, ranging from macroscopic properties of materials to molecular recognition. Two key aspects of the atomic force microscope (AFM), namely its sensitivity to sub-nanoNewton forces and its very sharp probe, offer the opportunity to measure interactions between very small numbers of molecules. Through chemical tailoring of both substrates and AFM probes with self-assembled mono layers (SAMs), measurements of forces acting between specific functional groups can be measured. Furthermore, the force required to rupture a single chemical bond can be obtained by a detailed analysis of the histograms of rupture forces. A new model was derived to examine the relationship between the various experimental variables and the shape of histograms of rupture forces when discrete chemical bonds are formed between the AFM probe and substrate. Calculations based on the model demonstrated that in measurements aimed at detecting single bond rupture forces, strict limits are put on the size of the AFM probe, the relative magnitude of the interfacial energies and the bond formation probability. These results were used in two experimental systems where the single bond rupture force was successfully measured: 0) the abstraction of a single Au-S complex from an Au coated AFM probe; and (ill the rupture of a single charge-transfer (cI) complex between tetramethylphenylenediamine (TMPO) and tetracyanoquinodimethane (TCNQ). Measurements involving only one molecule at a time were conducted using polymer chains chemically grafted to the AFM probe and substrate. In these measurements, the effect of the solvent on the elasticity of the polyethylene-propylene oligomers was directly observed in the force-elongation profile"--Leaves iii-iv.

Author: Aniket Datar
Publisher:
ISBN:
Category :
Languages : en
Pages : 152

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The use of organic semiconductors in electronic devices emerged with the fabrication of photovoltaic cells with organic dyes and in recent years their applications have extended to field effect transistors (FETs) and light emitting devices (LEDs). Increased attention towards organic semiconductors and materials is mainly due to flexibility they provide with respect to the properties of individual molecules and fabrication in desired shapes. Among n-type semiconductors, perylenetetracaboxylicdiimide (PTCDI), is gaining increasing attention due to its high photo and thermal stability. With the modification of side chains with different functionalities, one can tune the solubility of molecule in different solvent and the morphology of resultant molecular aggregates. Following work presents the use of PTCDI molecules with three different side chains attached to PTCDI core. We investigated the effect of different side chains on resultant morphology when fabricated through different processing techniques. Fabrication techniques applied are solution based processing and surface assisted solvent vapor annealing. The later technique provides a better control over the size and shape of resultant nanocrystals. We investigated the size and optical properties of nanocrystals formed with the help of atomic force microscopy (AFM) and near-field scanning optical microscopy (NSOM). Through solution based and surface assisted solvent vapor annealing processes under different conditions, we have fabricated nanocrystals with different aspect ratios, size and shape. Currently we are working on investigation of electrical measurements for application of nanocrystals in real time electronic devices.

Author: Katsuhiko Ariga
Publisher: Elsevier
ISBN: 0323994733
Category : Technology & Engineering
Languages : en
Pages : 648

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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

Author: Phaedon Avouris
Publisher: Springer Science & Business Media
ISBN: 9780792323341
Category : Science
Languages : en
Pages : 370

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Book Description
Presents, in a single volume, highlights of the recent work in the new field of atomic and nanometer-scale modification and manipulation of materials. Atomic manipulation techniques ranging from scanning tunneling microscopy to light-pressure lithography, and fabrication approaches ranging from molecular-beam epitaxy to molecular self-assembly are discussed. The book includes extensive discussions of the fundamental physical mechanisms underlying the modification and manipulation processes, as well as discussions of new phenomena observed in nanostructures. This book would be of interest to physicists, chemists and other scientists interested in atomic scale phenomena and nanostructures.

Author: Christopher Frewin
Publisher: BoD – Books on Demand
ISBN: 9535101145
Category : Medical
Languages : en
Pages : 374

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Book Description
The atomic force microscope (AFM) has become one of the leading nanoscale measurement techniques for materials science since its creation in the 1980's, but has been gaining popularity in a seemingly unrelated field of science: biology. The AFM naturally lends itself to investigating the topological surfaces of biological objects, from whole cells to protein particulates, and can also be used to determine physical properties such as Young's modulus, stiffness, molecular bond strength, surface friction, and many more. One of the most important reasons for the rise of biological AFM is that you can measure materials within a physiologically relevant environment (i.e. liquids). This book is a collection of works beginning with an introduction to the AFM along with techniques and methods of sample preparation. Then the book displays current research covering subjects ranging from nano-particulates, proteins, DNA, viruses, cellular structures, and the characterization of living cells.

Author: Shihe Yang
Publisher: CRC Press
ISBN: 0203212215
Category : Technology & Engineering
Languages : en
Pages : 221

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Book Description
The development of nanostructured materials represents a new and fast evolving application of recent research in physics and chemistry. Novel experimental tools coupled with new theory have made this possible. Topics covered in this book include nanocrystals, semiconductor heterostructures, nanotubes, nanowires, and manipulation and fabrication techniques. The core of the book consists of ten lectures by five distinguished researchers, Paul Alivisatos, D.D. Awschalom, Sumio Iijima, Charles Lieber and Phaedon Avouris, presented at an Advanced Study Institute in Hong Kong in January 1999. It should interest materials physicists and chemists as well as materials scientists with an interest in the growth and characterisation of sophisticated materials.

Author: Nikodem Tomczak
Publisher: World Scientific
ISBN: 9814462802
Category : Science
Languages : en
Pages : 277

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Book Description
Scanning Probe Microscopy (SPM) is the enabling tool for nano(bio)technology, which has opened new vistas in many interdisciplinary research areas. Concomitant with the developments in SPM instrumentation and techniques are new and previously unthought-of opportunities in materials nanofabrication and characterisation. In particular, the developments in addressing and manipulating matter at the level of single atoms or molecules, and studies of biological materials (e.g. live cells, or cell membranes) result in new and exciting discoveries.The rising importance of SPM demands a concise treatment in the form of a book which is accessible to interdisciplinary practitioners. This book highlights recent advances in the field of SPM with sufficient depth and breadth to provide an intellectually stimulating overview of the current state of the art. The book is based on a set of carefully selected original works from renowned contributors on topics that range from atom technology, scanning tunneling spectroscopy of self-assembled nanostructures, SPM probe fabrication, scanning force microscopy applications in biology and materials science down to the single molecule level, novel scanning probe techniques, and nanolithography.The variety of topics underlines the strong interdisciplinary character of SPM related research and the combined expertise of the contributors gives us a unique opportunity to discuss possible future trends in SPM related research. This makes the book not merely a collection of already published material but an enlightening insight into cutting edge research and global SPM research trends.

Author: Aleksandr Noy
Publisher: Springer Science & Business Media
ISBN: 038749989X
Category : Science
Languages : en
Pages : 311

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Book Description
Researchers in academia and industry who are interested in techniques for measuring intermolecular forces will find this an essential text. It presents a review of modern force spectroscopy, including fundamentals of intermolecular forces, technical aspects of the force measurements, and practical applications. The handbook begins with a review of the fundamental physics of loading single and multiple chemical bonds on the nanometer scale. It contains a discussion of thermodynamic and kinetic models of binding forces and dissipation effects in nanoscale molecular contacts, covers practical aspects of modern single-molecule level techniques, and concludes with applications of force spectroscopy to chemical and biological processes. Computer modeling of force spectroscopy experiments is also addressed.