Synthesis and Property Investigations of Well-defined Polymer/inorganic Core-shell Nanomaterials with Structural, Optical, Electronic and Magnetic Properties PDF Download

Author: Stefanie Marie Gravano
Publisher:
ISBN:
Category :
Languages : en
Pages : 358

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Author: Jian Feng Wong
Publisher:
ISBN:
Category :
Languages : en
Pages : 134

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Author:
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Category :
Languages : en
Pages :

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Author: Franco Iglesias
Publisher:
ISBN:
Category : Carbon-coated iron
Languages : en
Pages : 0

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It cannot be overstated that nanoparticles have earned their reputation for being famously practical, from simple artisan pottery to biomedical applications. Since Faraday's famous observations into thin gold films during the 1800's, nanoparticle research has shown the world that experimentation into synthesizing nanoparticles, and more interestingly core/shell nanoparticles, will prove worthwhile in the fight against cancerous cells. As it stands, carbon-coated iron-based core/shell nanoparticles have shown promising results, thrice in high magnetic saturation, high coercivity, and biocompatibility. The objective of this thesis is to compare already synthesized iron-based core/shell nanoparticles to our synthesized nanoparticles, as well as indicate another potential precursor candidate to be used for synthesis of nanoparticles. The magnetic properties of the product of pyrolysis of iron phthalocyanine annealed under an oxygen-rich environment at different temperatures are investigated with a vibrating sample magnetometer (VSM), scanning electron microscope (SEM), and X-ray diffractometry (XRD). The magnetic hysteresis curve of different samples measured at 10 K and 300 K illustrates the strong magnetic responses to a varying magnetic field under a VSM. The magnetic saturation (MS), magnetic remanence (MR) and coercivity (HC) values for all samples are listed in Tables 3 through 6. We investigate the effects of annealing at different temperatures in an oxygen-rich environment for iron phthalocyanine, and demonstrate that as the annealing temperature is elevated, HC increases while the MS decreases. As the annealing temperature is elevated further above an optimal value, a sharp decreasing change of magnetic parameters can be related to the degradation of iron and the formation of iron oxide particles in different phases such as magnetite (Fe3O4), maghemite (Îđ-Fe2O3), and hematite (Îł-Fe2O3). To conclude, the magnetic properties of iron phthalocyanine post pyrolysis can be varied as a function of annealing temperature as shown in Figure 32 and 33. More detailed studies will be necessary to define nanoparticle distribution, their morphology, sizes, and crystal structure, along with the percent composition of inspected samples. The magnetic properties of the product of pyrolysis of iron porphyrin were also studied for comparison and their magnetic properties can be seen in Table 7. While more research into higher annealed temperatures should be performed, iron porphyrin has shown to be a promising candidate for synthesis of nanoparticles due to its interesting features, mainly its constant MR/MS ratio over different annealed temperatures.

Author: Vikas Mittal
Publisher: CRC Press
ISBN: 1439814449
Category : Technology & Engineering
Languages : en
Pages : 384

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Polymer latex particles continue to become increasingly important in numerous commercial applications. Advanced synthesis techniques are the key to developing new functionality for nanoparticles. These methods make it possible to tailor the size, chemical composition, or properties of these particles, as well as the molecular weight of the polymer

Author: Ram K. Gupta
Publisher: CRC Press
ISBN: 1000824306
Category : Science
Languages : en
Pages : 525

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One-dimensional nanomaterials are emerging as promising materials for their many unique characteristics. This book covers their synthesis and applications in batteries, supercapacitors, fuel cells, solar cells, green energy production, flexible electronics, electrochemical sensors, and biomedicine. Progress in nanotechnology offers an opportunity to synthesize materials with unique properties. The properties of nanomaterials can be further improved by growing them in one-dimension structural with variations in their architecture. One-dimensional polymeric nanocomposites offer various advantages such as nano dimensions, high surface area, structural stability, and the ability to tune their electrochemical, electronic, and optical properties. The book covers basic concepts, chemistries, properties, and the importance of one-dimensional nanomaterials, along with their wide applications and state-of-the-art progress in the energy, flexible electronics, sensor, and biomedical fields. The fundamentals of electrochemical behavior and their understanding for various applications are also discussed in detail. This book will provide new direction to scientists, researchers, and students to better understand the chemistry, technologies, and applications of one-dimensional polymeric nanocomposites.

Author: Sanyog Jain
Publisher: Elsevier
ISBN: 0128178477
Category : Technology & Engineering
Languages : en
Pages : 704

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Applications of Nanotechnology in Cancer Chemotherapy offers a complete and concise summary of nanotechnological interventions for cancer management. It highlights the basics of oncology, the cancer microenvironment, targets for active drug delivery, the underlying mechanisms and molecular pathways to enhance the drug delivery to the cancer site. The book discusses the principles of basic and innovative nanocarrier-based therapeutic approaches to modulate the progression of the disease. In addition, this book also explores the evolving targeting approaches specific to the cancer site and type. The scope of the book is not limited to targeted drug delivery for various cancers, but also explores the advancements in cancer imaging and diagnostics employing the nanotechnological tools. Emphasis has been given on the important evaluation techniques like in-vitro cell culture and in-vivo animal models to assess the performance of cancer nanomedicines. The book includes clinical study reports of various drug moieties explored using variety of nanoconstructs in myriad cancer conditions with the input of global market and pharmacoeconomics. - Discusses how organic and inorganic nanoplatforms are being used in cancer treatment - Shows how nanotechnology is being used to create new and more accurate diagnostic tools - Surveys the current generation of cancer nanomedicines, assessing their advantages and challenges

Author: Chaoying Wan
Publisher: Royal Society of Chemistry
ISBN: 1839162600
Category : Science
Languages : en
Pages : 293

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Functional, flexible and lightweight products are in high demand for modern technologies ranging from microelectronics to energy storage devices. The majority of polymers are thermal and electrical insulators, which hinder their use in these applications. The conductivity of polymers can be significantly enhanced by the incorporation of conducting inorganic nanoparticles. However, this relies not only on the structure and function of the inorganic particles, but is highly determined by the morphology and dispersion of the nanoparticles, interfacial interactions and fabrication technologies of the composites. This book highlights the synthesis, chemistry and applications of two-dimensional (2D) inorganic nanoplatelets in polymer nanocomposites. Chapters cover technical challenges, such as surface functionalisation, compatibilization, interfacial interaction, dispersion, and manufacturing technologies of the polymer nanocomposites. The book also discusses the applications of these polymer nanocomposites in electronics and energy storage. With contributions from global experts, the book provides a much-needed overview of the field, giving advanced undergraduates, postgraduates and other researchers with a convenient introduction to the topic.

Author: Imran Khan
Publisher: Elsevier
ISBN: 032390341X
Category : Technology & Engineering
Languages : en
Pages : 636

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Magnetic Nanoparticles and Polymer Nanocomposites: Fundamentals and Biological, Environmental and Energy Applications focuses on the manufacturing and design of innovative magnetic polymeric nanocomposite materials for a broad range of different applications. These materials have truly outstanding and sustainable properties unlike other composites because they are combined with both organic (polymer matrix) and inorganic (semiconductor nanoparticles) materials to form a sustainable composite material. The book's focus is on magnetic semiconductor and polymer nanocomposites made from bioresorbable and biocompatible polymers, modified with magnetic nanoparticles. This book provides detailed knowledge on the modern research application of magnetic semiconductor and polymeric nanocomposites that have tremendous commercial value. In addition, these nanocomposite materials are also a good source for the renewable energy-based industry. - Covers magnetic nanoparticles and polymer nanocomposites in environmental, renewable energy, water treatment, energy storage and biomedical applications - Provides fundamental knowledge on design, synthesis, properties investigation, applications and manufacturing - Emphasizes recent advances on magnetic nanoparticles and polymer nanocomposites

Author: Mohammad Delower Hossain
Publisher:
ISBN:
Category : Antiferromagnetism
Languages : en
Pages : 192

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I used hydrothermal nano-phase epitaxy technique to synthesize well-ordered a-Cr2O3@a-MxCr2-xO3 (M=Co, Ni, Mn, Fe) inverted core-shell nanoparticles (NPs). This resulted in the formation of novel a-MxCr2-xO3 shells having ferromagnetic/ferrimagnetic (FM/FiM) spin ordering and an antiferromagnetic (AFM) a-Cr2O3 core structure. The combined results from Xray diffraction (XRD) and high resolution transmission electron microscoy (HRTEM) provide evidence of the presence of the corundum phase both in the shell and in the core regions. HRTEM results also show a sharp interface exhibiting epitaxial atomic registry of shell atoms over highly ordered core atoms whereas TEM-Energy dispersive spectroscopy analyses show that the M atoms reside in the shell regions. The Xray photoelectron spectroscopy (XPS) analyses of the NPs indicate the M transition metal is in +2 oxidation state. Magnetic measurements show well-developed hysteresis loops: the field cooled hysteresis loops reveal horizontal shifts in the applied field axis and vertical shifts in the magnetization axis, relative to the zero-field cooled hysteresis loops. This provides direct evidence for the exchange bias effect between the AFM a-Cr2O3 core and the FM/FiM a-MxCr2-xO3 shell. My first principles density functional theory calculations show that the incorporation of Ni2+ in a-Cr2O3 results in localized FM ordering in the structure.