Download or read book Synthesis Processing and Characterization of Magnetic Nanoparticles for Use in Bit Patterned Media written by Aaron Charles Johnston-Peck and published by . This book was released on 2011 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Nanoparticles written by Abdollah Hajalilou and published by John Wiley & Sons. This book was released on 2022-10-06 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Nanoparticles Learn how to make and use magnetic nanoparticles in energy research, electrical engineering, and medicine In Magnetic Nanoparticles: Synthesis, Characterization, and Applications, a team of distinguished engineers and chemists delivers an insightful overview of magnetic materials with a focus on nano-sized particles. The book reviews the foundational concepts of magnetism before moving on to the synthesis of various magnetic nanoparticles and the functionalization of nanoparticles that enables their use in specific applications. The authors also highlight characterization techniques and the characteristics of nanostructured magnetic materials, like superconducting quantum interference device (SQUID) magnetometry. Advanced applications of magnetic nanoparticles in energy research, engineering, and medicine are also discussed, and explicit derivations and explanations in non-technical language help readers from diverse backgrounds understand the concepts contained within. Readers will also find: A thorough introduction to magnetic materials, including the theory and fundamentals of magnetization In-depth explorations of the types and characteristics of soft and hard magnetic materials Comprehensive discussions of the synthesis of nanostructured magnetic materials, including the importance of various preparation methods Expansive treatments of the surface modification of magnetic nanoparticles, including the technical resources employed in the process Perfect for materials scientists, applied physicists, and measurement and control engineers, Magnetic Nanoparticles: Synthesis, Characterization, and Applications will also earn a place in the libraries of inorganic chemists.

Download or read book Cobalt based Magnetic Nanoparticles written by Mehdi Zamanpour and published by . This book was released on 2014 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ever-increasing desire for more energy attainable from a smaller volume of matter has driven researchers to explore advanced materials at the molecular size. Magnetic materials at the nanometer size scale have been the subject of enormous research effort worldwide for more than half a century. Different magnetic nanoparticles have shown different behavior in the absence and presence of an external magnetic field, which has led them to be categorized as soft or hard magnets. Applications range from medical and biomedical devices to magnetic recording media and magnetic sensing have emphasized the importance of this class of materials. Soft magnetic phases have found application in power generation and magnetic targeted drug delivery, while hard magnets have been subject of extensive research for application as energy storage media. Discovery of the exchange-coupling phenomenon between two adjacent hard and soft magnetic phases has attracted scientists to develop advanced materials for energy storage with no usage of fossil fuels: clean energy. In this Dissertation, synthesis of pure phase, soft FeCo nanoparticles with high magnetic moment and hard phase CoxC nanoparticles possessing high coercivity is reported. The polyol method (chemical co-precipitating at polyhydric alcohol as reducing agent) is used to make FeCo and CoxC nanoparticles and the effects of important reaction kinetics parameters on the structure and magnetic properties of the products are studied. Careful analysis of correlations between these parameters and the properties of the magnetic particles has made synthesis of FeCo and CoxC nanoparticles with desired properties possible. Fabrication of MnAlC-FeCo heterostructures as a rare earth-free alternative for high-performance permanent magnet is also reported. To synthesize MnAlC-FeCo, mechanical alloying and dry mixing of MnAlC and FeCo nanoparticles are accomplished followed by annealing in a furnace. Overall, the achieved results in this work enable synthesis of high moment FeCo and high coercivity CoxC with desired structure and magnetic properties obtained through polyol method. In particular, this Dissertation provides the technique to fabricate cobalt carbide nanoparticles without using rare earth elements as a catalyst or as heterogeneous seed nuclei at any stage of the processing.

Download or read book Magnetic Nanoparticles written by Nguyen TK Thanh and published by CRC Press. This book was released on 2012-02-01 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering the latest information in magnetic nanoparticle (MNP) research, Magnetic Nanoparticles: From Fabrication to Clinical Applications provides a comprehensive review, from synthesis, characterization, and biofunctionalization to clinical applications of MNPs, including the diagnosis and treatment of cancers. This book, written by some of the most qualified experts in the field, not only fills a hole in the literature, but also bridges the gaps between all the different areas in this field. Translational research on tailored magnetic nanoparticles for biomedical applications spans a variety of disciplines, and putting together the most significant advances into a practical format is a challenging task. Balancing clinical applications with the underlying theory and foundational science behind these new discoveries, Magnetic Nanoparticles: From Fabrication to Clinical Applications supplies a toolbox of solutions and ideas for scientists in the field and for young researchers interested in magnetic nanoparticles.

Download or read book Magnetic Characterization Techniques for Nanomaterials written by Challa S.S.R. Kumar and published by Springer. This book was released on 2017-04-24 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixth volume of a 40 volume series on nanoscience and nanotechnology, edited by the renowned scientist Challa S.S.R. Kumar. This handbook gives a comprehensive overview about Magnetic Characterization Techniques for Nanomaterials. Modern applications and state-of-the-art techniques are covered and make this volume an essential reading for research scientists in academia and industry.

Download or read book Characterization of Patterned Magnetic Media Prepared Via Nano lithography written by Mladen Barbic and published by . This book was released on 2000 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Nanoparticles Synthesis and Characterization written by Shilpa Chakra Chidurala and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: A successful effort to Synthesize Magnetic Nanoparticles was achieved through co-precipitation & chemical synthesis route. The synthesized Magnetic nanoparticle shows very good applications in cancer treatment at various stages of oncogenicity as reported worldwide. A successful attempt was made to synthesize these nanoparticles for the above application.Since Fe2O3 is a potent ferromagnetic candidate, its use and applicability is very important and necessary in such kinds of treatments. Hence Fe2O3 was prepared using co-precipitation method, silica by sol-gel process and silica impregnated iron nanoparticles by chemical synthesis. Synthesized magnetic nanoparticles where characterized by XRD, FTIR, EDAX, SEM and TEM. These nanoparticles are used for hyperthermia cancer treatment at various levels of oncogenicity.

Download or read book Synthesis and Characterization of Magnetic Nanoparticles and Novel Magnetic Thin Films written by Raymond T. Sachs and published by . This book was released on 2006 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Nanoparticles Synthesis and Comprehensive Characterization written by V. N. Lad and published by . This book was released on 2023-08-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be helpful for academicians, researchers and working professionals engaged in the field of science as well as engineering. It provides basic information related to synthesis of magnetic nanoparticles, several synthesis methods, specific characterizations, their stability and applications in variety of fields. This is an introductory book which is applicable for teaching as well as for research purposes. It covers all the major aspects of magnetic nanoparticle synthesis in an easy, accessible and concise ways. The initial chapters described the types of magnetic particles and magnetism in nanoparticles with their occurrences and behavior in different conditions. Later chapters describe the classical methods of nanoparticles synthesis, specific characterizations, stability, and finally broad applications in various technical fields in an exhaustive tabular format for easy and quick access for the readers to the current research scenario which help them to identify the research gap and novelty in the research directions.

Download or read book Synthesis and Characterization of Magnetic Cabides and Oxides Nanomaterials written by Hei Man Tsui and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and development of nanoparticles is of great interest in the current energy and electronic industry. However, based on the current materials available the production cost can be high with insignificant magnetic and mechanical properties. Specifically, rare-earth magnetic materials composed of neodymium and samarium are known for their high magnetic performance, however, due to the cost of development there is a need to develop a versatile and cost effective material. Alternatively, cobalt carbide nanomaterials have shown to be a promising alternative for rare-earth free magnets as they exhibit comparable properties as hexaferrite magnetic materials. The primary goal of this dissertation focuses on the development of nanoparticles for permeant magnetic, and magnetic refrigeration applications. The first part of this work focuses on the synthesis of cobalt carbide (CoxC, x=2,3) nanoparticles using a novel polyol synthesis method by introducing a small amount of Ru, Cu, or Au as nucleating agent. It was found that the morphology and magnetic properties of the as-synthesized CoxC nanoparticles change as a result of directional growth of nanoparticles using nucleating agents. Needle-like particle morphology ranges from 20-50 nm in width and as long as 1 [micro]m in length were synthesized using Ru as nucleating agent. These particles exhibit magnetization saturation of 33.5 emu/g with a coercivity of 2870 Oe and a maximum energy product 1.92 MGOe (BHmax) observed. Particle morphology is a critical aspect in the development of magnetic nanoparticles as anisotropic particles have shown increased coercivity and magnetic properties. These CoxC nanomaterials have a higher maximum energy product compared to previous work providing further insight into the development of non-rare earth magnetic material. The second part of this dissertation work focuses on the sol-gel synthesis of perovskite LaCaMnO3(LCMO) nanomaterials. In this process, various chain lengths of polyethylene glycol (PEG) was added into a solution consisting of La, Ca, and Mn salts. The solution was left for the gelation process, and high temperature sintering to obtain the final product. By varying the polymer chain of the PEG, the size of the as synthesized LaCaMnO3 nanomaterials were altered. The as-synthesized LCMO nanomaterials have shown a maximum change in magnetic entropy ( -[delta]Sm) was found to be 19.3 Jkg−1K−1 at 278 K for a field change of 0-3 T and 8.7 Jkg−1K−1 for a field change of 0-1 T. This is a significant improvement in comparison to current literature of the material suggesting that this is a promising alternative to Gd materials that is prone to oxidation. With additional development, LCMO or related maganites could lead to application in commercial technologies.

Download or read book Synthesis and Characterization of Magnetic Nanoparticles written by Narayan Poudyal and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesis of uniform nanoparticles (

Download or read book Nanoparticles for Biomedical Applications written by Eun Ji Chung and published by Elsevier. This book was released on 2019-11-19 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoparticles for Biomedical Applications: Fundamental Concepts, Biological Interactions and Clinical Applications brings into one place information on the design and biomedical applications of different classes of nanoparticles. While aspects are dealt with in individual journal articles, there is not one source that covers this area comprehensively. This book fills this gap in the literature. Outlines an in-depth review of biomedical applications of a variety of nanoparticle classes Discusses the major techniques for designing nanoparticles for use in biomedicine Explores safety and regulatory aspects for the use of nanoparticles in biomedicine

Download or read book Synthesis and Characterization of Magnetic Iron Oxide Nanoparticles written by Aidin Lak and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis and Characterization of Magnetic Nanoparticles and Nano composites written by Wai-lun Sin and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Nanoparticles Based on Iron written by Michael David Shultz and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic nanoparticles are of great interest for a wide range of applications. This work has focused on three primary forms of iron based nanoparticles and combinations thereof: [alpha]-iron, iron oxide, and iron carbide or cementite. The synthesis of several core-shell particles including cementite-iron oxide, [alpha]-iron-cementite, and [alpha]-iron-iron oxide was accomplished through reverse micelle routes and high temperature decomposition of iron pentacarbonyl in various media. Structural analysis to confirm the structures was performed using extended x-ray absorption fine structure (EXAFS) techniques. A rapid characterization technique was developed utilizing a correlation between Fourier transform infrared spectroscopy and EXAFS to determine the full metal cation distribution between the octahedral and tetrahedral sites in manganese zinc ferrite (MZFO). This method was then used to show that the initial Fe3+ to Fe2+ ratio in MZFO synthesis could be used to design a desired cation distribution and affected the zinc incorporation levels into the resultant ferrite. Functionalization of nanoparticles for aqueous dispersions and ferrofluids has varying degrees of importance, depending on the application. In applications such as magnetic resonance imaging (MRI) where the targets are biological systems, it was important to produce solutions that will not aggregate in the high magnetic field of the MRI. It was also vital to characterize decomposition mechanisms and products that would be presented to the body after use as a contrast agent. This work has provided insight into both the preparation of magnetic samples for MRI applications and implications of the biocompatibility of reactive and decomposition products. Three successful methods of forming dispersions that would not aggregate in the high magnetic field of the MRI were comprised of cysteine/polyethylene glycol (PEG), PEG based ferrofluids, and dopamine/PEG. The dopamine functionalization however showed reactivity with the iron/iron oxide nanoparticles and led to the formation of the cytotoxic dopamine quinone and resulted in the destruction of the nanoparticles. Using all three types of dispersions to compare the iron based nanomaterials, the MRI measurements concluded with the iron oxide ferrofluid yielding the highest R2 enhancement.

Download or read book Controlled Synthesis of Magnetic Particles written by Su Kyung Suh (Ph. D.) and published by . This book was released on 2011 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic particles have been used for many applications demanding a broad range of particles morphologies and chemistries. Superparamagnetism is advantageous over ferromagnetism because it enables us to control and recover magnetic nanoparticles during and after chemical processing. Superparamagnetic particles have an oriented magnetic moment under a magnetic field but lose this behavior in the absence of a field. Ferromagnetic materials can be superparamagnetic when they consist of a single size domain, which is on the order of 10s of nanometers. However, since the magnetic force is proportional to the volume of the particle, one needs to apply higher gradient of magnetic field to recover smaller particles. Therefore, large particles are preferred for easy manipulation using external forces. For this reason, the synthesis of large, superparamagnetic particles is very important and is desirable for future applications. The purpose of this work is (1) to examine the three synthesis methods of superparamagnetic units, (2) to understand the behavior of particles created using these methods as well as the synthesis mechanisms, and (3) to investigate the potential applications of these particles. Large paramagnetic particles can be made by assembling superparamagnetic nanoparticles. We developed a method for the process-dependent clustering of monodisperse magnetic nanoparticles using a solvent evaporation method from solid-in-oilin- water (S/O/W) type emulsions. When polymers that are incompatible with the nanoparticle coatings were included in the emulsion formulation, monolayer- and multilayer-coated polymer beads and partially coated Janus beads were prepared. The precise number of nanoparticle layers depended on the polymer/magnetic nanoparticle ratio in the oil droplet phase parent emulsion. The magnetic nanoparticle superstructures responded to the application of a modest magnetic field by forming regular chains with alignment of nonuniform structures (e.g., toroids and Janus beads) in accordance with theoretical predictions and with observations in other systems. In addition, we synthesized non-spherical magnetic microparticles with multiple functionalities, shapes and chemistries. Particle synthesis is performed in two steps; polymeric microparticles homogenously functionalized with carboxyl groups were generated AA % using stop-flow lithography, and then in situ co-precipitation was used to grow magnetic nanoparticle at these carboxyl sites. With successive growth of magnetic nanoparticles, we obtained polymeric particles with saturations magnetization up to 42 emu per gram of microparticle, which is significantly greater than what can be obtained commercially. We also investigated the physical properties of magnetic nanoparticles grown in polymeric microparticles, and provide an explanation of the properties. Lastly, we used experimentation and modeling to investigate the synthesis of opaque microparticles made via stop-flow lithography. Opaque magnetic beads incorporated into hydrogel microparticles during synthesis changed the height and the degree of cross-linking of the polymer matrices formed. The effect of the concentration of the opaque material on the particle height was determined experimentally, and agreed well with model predictions based on the photopolymerization process over a wide range of UV absorbance. We also created particles with two independent anisotropies, magnetic and geometric, by applying magnetic fields during particle synthesis. Our work provides a platform for rational design of lithographic patterned opaque particles and also a new class of structured magnetic microparticles. Overall, this work demonstrates three strategies for creating magnetic substrates containing superparamagnetic nanoparticles and characterization of their resulting properties.

Download or read book Magnetic Nanoparticles in Nanomedicine written by Kai Wu and published by Elsevier. This book was released on 2024-06-14 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Nanoparticles in Nanomedicine provides readers with the fundamental theories and principles of magnetic materials, the synthesis and surface functionalization strategies of MNPs, and the standard techniques for characterizing physicochemical properties of MNPs. Other sections review MNP-based therapies such as magnetic hyperthermia therapy, drug/gene delivery, and magnetic neurostimulation and cover MNP-based in vitro and in vivo disease diagnosis, respectively, including techniques such as magnetoresistive (MR), nuclear magnetic resonance (NMR), magnetic particle spectroscopy (MPS) biosensing platforms, magnetic resonance imaging (MRI), and magnetic particle imaging (MPI). Final chapters address biocompatibility and safety issues in applying MNPs to in vivo biomedical applications, including coverage of the toxicity of MNPs to human tissues, the immune responses of the human body to these particles, as well as blood circulation time of MNPs. Provides a valuable tool for academics and clinicians, pushing the frontiers of magnetic-based early-stage disease diagnosis and screening Clearly explains the synthesis, functionalization, and biocompatibility of magnetic nanoparticles Describes micromagnetic simulation, a valuable tool for predicting the properties of magnetic nanomaterials