The Synthesis, Self-Assembly, and Application of Magnetic and and Silica Nanoparticles PDF Download

Author: Brian Bernard Lynch
Publisher:
ISBN:
Category :
Languages : en
Pages : 138

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Author: Sebastian Ekeroth
Publisher: Linköping University Electronic Press
ISBN: 9176850099
Category :
Languages : en
Pages : 58

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Nanomaterials are important tools for enabling technological progress as they can provide dramatically different properties as compared to the bulk counterparts. The field of nanoparticles is one of the most investigated within nanomaterials, thanks to the existing, relatively simple, means of manufacturing. In this thesis, high-power pulsed hollow cathode sputtering is used to nucleate and grow magnetic nanoparticles in a plasma. This sputtering technique provides a high degree of ionization of the sputtered material, which has previously been shown to aid in the growth of the nanoparticles. The magnetic properties of the particles are utilized and makes it possible for the grown particles to act as building blocks for self-assembly into more sophisticated nano structures, particularly when an external magnetic field is applied. These structures created are termed “nanowires” or “nanotrusses”, depending on the level of branching and inter-linking that occurs. Several different elements have been investigated in this thesis. In a novel approach, it is shown how nanoparticles with more advanced structures, and containing material from two hollow cathodes, can be fabricated using high-power pulses. The dual-element particles are achieved by using two distinct and individual elemental cathodes, and a pulse process that allows tuning of individual pulses separately to them. Nanoparticles grown and investigated are Fe, Ni, Pt, Fe-Ni and Ni-Pt. Alternatively, the addition of oxygen to the process allows the formation of oxide or hybrid metal oxide – metal particles. For all nanoparticles containing several elements, it is demonstrated that the stoichiometry can be easily varied, either by the amount of reactive gas let into the process or by tuning the amount of sputtered material through adjusting the electric power supplied to the different cathodes. One aim of the presented work is to find a suitable material for the use as a catalyst in the production of H2 gas through the process of water splitting. H2 is a good candidate to replace fossil fuels as an energy carrier. However, rare elements (such as Ir or Pt) needs to be used as the catalyst, otherwise a high overpotential is required for the splitting to occur, leading to a low efficiency. This work demonstrates a possible route to avoid this, by using nanomaterials to increase the surface-to-volume ratio, as well as optimizing the elemental ratio between different materials to lower the amount of noble elements required.

Author:
Publisher: Elsevier
ISBN: 0128139358
Category : Science
Languages : en
Pages : 292

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Nano-sized Multifunctional Materials: Synthesis, Properties and Applications explores how materials can be down-scaled to nanometer-size in order to tailor and control properties. These advanced, low-dimensional materials, ranging from quantum dots and nanoparticles, to ultra-thin films develop multifunctional properties. As well as demonstrating how down-scaling to nano-size can make materials multifunctional, chapters also show how this technology can be applied in electronics, medicine, energy and in the environment. This fresh approach in materials research will provide a valuable resource for materials scientists, materials engineers, chemists, physicists and bioengineers who want to learn more on the special properties of nano-sized materials. Outlines the major synthesis chemical process and problems of advanced nanomaterials Shows how multifunctional nanomaterials can be practically used in biomedical area, nanomedicine, and in the treatment of pollutants Demonstrates how the properties of a variety of materials can be engineered by downscaling them to nano size

Author: Shan Jiang
Publisher: Royal Society of Chemistry
ISBN: 1849735107
Category : Science
Languages : en
Pages : 313

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Named after the two-faced roman god, Janus particles have gained much attention due to their potential in a variety of applications, including drug delivery. This is the first book devoted to Janus particles and covers their methods of synthesis, how these particles self-assemble, and their possible uses. By following the line of synthesis, self-assembly and applications, the book not only covers the fundamental and applied aspects, but it goes beyond a simple summary and offers a logistic way of selecting the proper synthetic route for Janus particles for certain applications. Written by pioneering experts in the field, the book introduces the Janus concept to those new to the topic and highlights the most recent research progress on the topic for those active in the field and catalyze new ideas.

Author: Christian Binek
Publisher: Springer Science & Business Media
ISBN: 9783540404286
Category : Science
Languages : en
Pages : 138

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Selected modern aspects of artificially layered structures and bulk materials involving antiferromagnetic long-range order are the main themes of this book. Special emphasis is laid on the prototypical behavior of Ising-type model systems. They play a crucial role in the field of statistical physics and, in addition, contribute to the basic understanding of the exchange bias phenomenon in MBE-grown magnetic heterosystems. Throughout the book, particular attention is given to the interplay between experimental results and their theoretical description, ranging from the famous Lee-Yang theory of phase transitions to novel mechanisms of exchange bias.

Author: Zhiqun Lin
Publisher: World Scientific
ISBN: 1786343142
Category : Science
Languages : en
Pages : 545

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This book investigates recent progress in synthesis of soft, hard and hybrid Janus structures and looks at processing strategy, such as emulsion polymerization, microfluidics, co-jetting and seeded growth. Also reviewed are both the experimental and theoretical studies on the unique self-assembly behaviour of Janus particles.Janus particles are special types of nanoparticles whose surfaces have two or more distinct physical properties. These two hemistructures are of different composition and functionality, offering promising potential for application through the multiple combinations possible — areas in which Janus structures can be applied include drug delivery, magnetic biomarkers, bactericides, tailored plasmon resonance, photocatalysis and nanoengines. Encapsulating a wealth of research on Janus structures, this review of the literature is specifically designed to benefit graduate students and researchers in the fields of chemistry, materials science, engineering, biotechnology and applied physics, as well as practitioners in these industries.

Author: Shafigh Mehraeen
Publisher: BoD – Books on Demand
ISBN: 1789239605
Category : Technology & Engineering
Languages : en
Pages : 102

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Top-down approaches are currently the main contributor of fabricating microelectronic devices. However, the prohibitive cost of numerous technological steps in these approaches is the main obstacle to further progress. Furthermore, a large number of applications necessitate fabrication of complex and ultra-small devices that cannot be made using these approaches. New approaches based on natural self-assembly of matter need to be developed to allow for fabrication of micro and nanoelectronic devices. Self-assembly of nanostructures is a dynamic field, which explores physics of these structures and new ways to fabricate them. However, the major problem is how to control the properties of the nanostructures resulting from low dimensionality. This book presents recent advances made to address this problem, and fabricate nanostructures using self-assembly.

Author: Jeffrey D. Rimer
Publisher:
ISBN:
Category :
Languages : en
Pages : 302

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In a broader scope, the techniques and findings derived in this thesis offer a general methodology that can be applied to other microporous, or silicate, materials to develop predictive models of growth, thereby serving as a framework toward rational syntheses of novel nanomaterials.

Author: Yaroslav Kievsky
Publisher:
ISBN:
Category : Morphogenesis
Languages : en
Pages : 338

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Author: George Zhao
Publisher: John Wiley & Sons
ISBN: 3527828737
Category : Technology & Engineering
Languages : en
Pages : 678

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Book Description
A comprehensive resource for new and veteran researchers in the field of self-assembling and functional materials In Functional Materials from Colloidal Self-assembly, a pair of distinguished researchers delivers a thorough overview of how the colloidal self-assembly approach can enable the design and fabrication of several functional materials and devices. Among other topics, the book explores the foundations of self-assembly in different systems, nucleation, the growth of nanoparticles, self-assembly of colloidal microspheres for photonic crystals and devices, and the self-assembly of amphiphilic molecules as a template for mesoporous materials. The authors also discuss the self-assembly of biomolecules, superstructures from self-assembly, architectures from self-assembly, and the applications of self-assembled nanostructures. Functional Materials from Colloidal Self-assembly provides a balanced approach to the theoretical background and applications of the subject, offering sound guidance to both experienced and early-career researchers. The book also delivers: A thorough introduction to the fundamentals of colloids, including the theory of nucleation and the growth of colloidal particles Comprehensive explorations of mechanisms and strategies for the self-assembly of colloidal particles, including DNA-mediated colloidal self-assembly Practical discussions of characterization techniques for self-assembled colloidal structures, including electron microscopy techniques and X-ray techniques In-depth examinations of biological and biomedical materials, including tissue engineering, drug loading and release, and biodetection Perfect for materials scientists, inorganic chemists, and catalytic chemists, Functional Materials from Colloidal Self-assembly is also a must-read reference for biochemists and surface chemists seeking a one-stop resource on self-assembling and functional materials.