one dimensional nanostructures (133 resultados)

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Taschenbuch. Condición: Neu. Neuware -The goal of this book is to give an overview about the dynamics of transverse domain walls. Therefore, it is necessary to understand first the underlying Heisenberg model which will be introduced in the first chapter. The quantum mechanical Heisenberg model can be used to describe single atoms, small clusters, and molecules. The classical Heisenberg model can be used to describe systems on the atomic and macroscopic (micromagnetism) scale. Within this book the description is restricted to the atomic scale and micromagnetic description and therefore, to the classical Heisenberg model. However, it will be shown that the corresponding equation of motion, the Landau-Lifshitz-Gilbert equation can be derived from quantum mechanics. Then, the Landau-Lifshitz-Gilbert equation will be used to describe the dynamics of domain walls.Books on Demand GmbH, Überseering 33, 22297 Hamburg 136 pp. Englisch.

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Taschenbuch. Condición: Neu. Neuware -This book is dedicated to the synthesis and characterization of one-dimensional zinc oxide nanostructures (1DZnO) through precision-driven pressure-modulated metal-assisted vapor transport. Thus, presenting compelling results for the controlled growth of high-crystalline 1DZnO nanostructures, enabling the fine-tuning of their optoelectronic and morphological properties. Furthermore, we investigate pivotal applications for these tailored 1DZnO nanostructures: photocatalytic hydrogen production and carbon dioxide sensing, with a view to advancing the green transition agenda. Additionally, the results address the critical challenge of detecting high impact pathogens, highlighting the development of an effective antibody attachment procedure to construct an E. coli optical biosensing layer on 1DZnO materials. This comprehensive work serves researchers, scientists, and engineers specializing in materials science, nanotechnology, and environmental and biosensing technologies, with the aim of addressing the complexities of controlled nanomaterial synthesis and their practical applications in environmental and healthcare contexts.Books on Demand GmbH, Überseering 33, 22297 Hamburg 116 pp. Englisch.

Taschenbuch. Condición: Neu. Neuware -Since the discovery of carbon nanotubes by Sumio Iijima, an intensive research on carbon materials has been carried out. Carbon nanotubes and carbon nanofibers have drawn much attention due to their electronic and mechanical properties. However, because of low production capacity and high production costs at present, their applications cannot be extended until large-scale production is realized. Among the many synthetic methods, chemical vapor deposition method has advantages of high yield, high selectivity and low cost over traditional physical ones such as laser ablation and arc-discharge. High yield synthesis of one dimensional carbon nanostructures is essential for applications. In this book, an economical and environmental friendly route for the scalable production of CNTs and CNFs on easy soluble support has been discussed. The use of synthesized carbon nanotubes as catalyst support for oxidation of alcohols by Schiff base complexes and also as hydrogen storage materials is discussed in detail.Books on Demand GmbH, Überseering 33, 22297 Hamburg 252 pp. Englisch.

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Taschenbuch. Condición: Neu. Druck auf Anfrage Neuware - Printed after ordering - One-dimensional (1D) nanostructures, including nanowires, nanotubes and quantum wires, have been regarded as the most promising building blocks for nanoscale electronic and optoelectronic devices. Worldwide efforts in both the theory and the experimental investigation ofgrowth, characterization and applications of 1D nanostructureshave resulted ina mature,multidisciplinary field. In this book, a wealth of state-of-the-art information offers the opportunity to uncover the underlying science from diverse perspectives. Leading researchers elucidate the synthesis and properties of 1D nanostructures forvarious morphologies and compositions (semiconductor, metal, carbon, etc.) as well as their considerable impact on spintronics, information storage, and the design of field-effect transistors.

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paperback. Condición: New. Language:Chinese.Paperback. Pub Date: 2013-6-1 Pages: 120 Publisher: Science Press the growth of one-dimensional gas-phase structure has some inherent growth mechanisms. and thus easy to design and preparation. Since the catalytic vapor-grown and one-dimensional structure. describes the basis of summing up one-dimensional structure of the vapor growth mechanism. focuses on self-catalytic VLS growth mechanism found in the research process. and the system introduces the use of self-catalytic VL.

Taschenbuch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Weakly-ferromagnetic hematite is a cheap, environmentally friendly and thermodynamically stable iron oxide, and 1D hematite nanorods (NRs) have been studied for a wide range of applications because their magnetic properties are greatly dependent on NR size and shape. Herein, the hydrothermal synthesis (HS) of hematite NRs is investigated using a combination of analytical techniques. Development of a novel, valve-assisted, hydrothermal pressure vessel, which allows for the rapid quenching of hydrothermal products as a function of reaction time and known reaction temperature, provided fundamental insight into the anisotropic crystal growth mechanism of the acicular hematite NRs. The hematite NR growth mechanism was found to be a two stage process: 1) the growth and dissolution of intermediate -FeOOH NRs, alongside precipitation of primary hematite nanoparticles (NPs); and 2) the agglomeration and coarsening of primary hematite NPs into hematite NRs. The investigation of rapidly quenched -FeOOH and hematite HS reaction products, heat treated in situ within a transmission electron microscope, provides direct evidence for the hydrothermal growth mechanism of lenticular hematite NRs.

Taschenbuch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Amphiphilic block copolymers can be spontaneously assembled and crosslinked around inorganic nanomaterials to form permanent core-shell nanostructures without the need for covalent attachment of the polymer to the particle. Single-walled carbon nanotubes (SWNTs) and Au nanoparticles were encapsulated within micelles made from amphiphilic poly(styrene-block-acrylic acid) (PS-b-PAA) or poly(methylmethacrylate-block-acrylic acid) (PMMA-b-PAA) copolymers. The structure and physical properties of these nanomaterials were precisely determined by the characteristics of the self-assembled components. The encapsulated nanomaterials can be spontaneously assembled into 1D chains by a morphological transition of polymer micelles from sphere to worm-like structure. Because the crosslinked micelle shells are topologically linked to nanoparticles rather than chemically bound, the encapsulation approach to core-shell nanostructures might be used to add polymer shells to nanomaterials that lack effective surface chemistries.