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Synthesis And Characterization Of Silicon Nanoparticles For Bioimaging And Dynamic Nuclear Polarization Magnetic Resonance Imaging
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Book Synopsis Synthesis and Characterization of Silicon Nanoparticles for Bioimaging and Dynamic Nuclear Polarization Magnetic Resonance Imaging by : Tonya Marie Atkins
Book Synopsis Designing and Characterizing Hyperpolarizable Silicon Nanoparticles for Magnetic Resonance Imaging by : Melis Nuray Anahtar
Download or read book Designing and Characterizing Hyperpolarizable Silicon Nanoparticles for Magnetic Resonance Imaging written by Melis Nuray Anahtar and published by . This book was released on 2008 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Resonance Imaging (MRI) is one of the most powerful noninvasive tools for diagnosing human disease, but its utility is limited because current contrast agents are ineffective when imaging air-tissue interfaces, in regions with low signal-tonoise ratios, or in areas that undergo motion, like the heart and bowel. A technique called dynamic nuclear polarization can be used to hyperpolarize nuclei and achieve dramatic MRI signal enhancement with minimal background noise. It has been shown that ballmilled silicon nanoparticles have the advantageous properties of hyperpolarizability and biodegradability, but in vivo utilization requires the modification of the particle surface to prevent aggregation that leads to very fast removal from circulation through phagocytosis by the liver, spleen, and lymph nodes. This thesis describes a method to functionalize hyperpolarizable silicon nanoparticles using silane chemistry and coating by poly(ethylene glycol). The particles were characterized using dynamic light scattering, scanning electron microscopy, and laser Doppler electrophoresis. The extent of amination was quantified using a fluorescamine assay, and stability was assessed by visualizing flocculation and measuring aggregation in different solvents. The functionalized particles were stable in solutions that resemble physiological conditions. These silicon nanoparticles can potentially be used for in vivo cancer imaging to enable early diagnoses and assist with clinical decision-making through disease monitoring.
Book Synopsis Spectroscopic Studies of Silica Nanoparticles by : Sean E. Lehman
Download or read book Spectroscopic Studies of Silica Nanoparticles written by Sean E. Lehman and published by . This book was released on 2016 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Primarily concerned with manipulation and study of matter at the nanoscale, the concept of nanoscience encompasses ideas such as nanomaterial synthesis, characterization, and applications to modern scientific and societal problems. These problems encompass a broad range of issues such as energy storage and conversion, medical diagnostics and treatment, environmental remediation and detection, carbon economy and as well as many others. Silica nanoparticles of porous morphology have broad application to many of these issues. In particular, the utility of silica nanoparticles is facilitated by their large intrinsic surface area, tunable surface chemistry, and synthetic variability in both their size and morphology. This facilitates applications to these problems. However, extensive characterization and deeper understanding is needed before full implementation in key applications can be realized. The work described in this thesis aims to explore fundamental and applied characterization of silica nanoparticles that might be used in biomedical and environmental applications. Fundamental studies of functionalized nanomaterials using NMR spectroscopy reveal complex, dynamic phenomena related to--and ultimately deriving from--the intrinsic and/or modified surface chemistry. Applied studies of nanomaterial-biological interfaces demonstrate free radical chemistry as dominating the toxic response of the materials when exposed to biological systems of interest. Characterization of protein adsorbed on the interface reinforces the ubiquitous nature of protein adsorption on nanomaterial surface in biological and environmental media. Overall, this work illuminates and highlights complex changes that take place in aqueous solution for silica nanoparticles of varied morphology and surface chemistry.
Book Synopsis Synthesis and Characterization of Silicon Nanoclusters by : Daniel Mayeri
Download or read book Synthesis and Characterization of Silicon Nanoclusters written by Daniel Mayeri and published by . This book was released on 1999 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Silicon Nanoparticles by : Wenjie Qin
Download or read book Synthesis and Characterization of Silicon Nanoparticles written by Wenjie Qin and published by . This book was released on 2002 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Photon Upconverting Nanoparticles as Contrast Agents for Magnetic Resonance Imaging by : Shanfeng Tang
Download or read book Synthesis and Characterization of Photon Upconverting Nanoparticles as Contrast Agents for Magnetic Resonance Imaging written by Shanfeng Tang and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solution Synthesis and Characterization of Silicon and Silicon/germanium Nanoparticles by : Katherine Ann Pettigrew
Download or read book Solution Synthesis and Characterization of Silicon and Silicon/germanium Nanoparticles written by Katherine Ann Pettigrew and published by . This book was released on 2004 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanosilicon by : Anatoly A. Ischenko
Download or read book Nanosilicon written by Anatoly A. Ischenko and published by CRC Press. This book was released on 2014-07-23 with total page 757 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanosilicon: Properties, Synthesis, Applications, Methods of Analysis and Control examines the latest developments on the physics and chemistry of nanosilicon. The book focuses on methods for producing nanosilicon, its electronic and optical properties, research methods to characterize its spectral and structural properties, and its possible applications. The first part of the book covers the basic properties of semiconductors, including causes of the size dependence of the properties, structural and electronic properties, and physical characteristics of the various forms of silicon. It presents theoretical and experimental research results as well as examples of porous silicon and quantum dots. The second part discusses the synthesis of nanosilicon, modification of the surface of nanoparticles, and properties of the resulting particles. The authors give special attention to the photoluminescence of silicon nanoparticles. The third part describes methods used for studying and controlling the structure and properties of nanocrystalline silicon. These methods include standard ones, such as electron microscopy, spectroscopy, and diffraction, as well as novel techniques, such as femtosecond spectroscopy, ultrafast electron nanocrystallography, and dynamic transmission electron microscopy. The fourth part details some of the practical applications of nanocrystalline silicon, including the use of nanoparticles as additives–absorbers of UV radiation in sunscreens. Incorporating much of the authors’ own extensive research results, this book provides a systematic account of the scientific problems of nanosilicon and its potential practical applications. It will help readers understand current and emerging applications and research methods of this unique material.
Book Synopsis Fluorescence and Magnetic Resonance Enabled Silica Nanoparticles for Bio-imaging Applications by : Parvesh Sharma
Download or read book Fluorescence and Magnetic Resonance Enabled Silica Nanoparticles for Bio-imaging Applications written by Parvesh Sharma and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Investigation of Silicon Nanostructures by : Ray Sheldon Carter
Download or read book Synthesis and Investigation of Silicon Nanostructures written by Ray Sheldon Carter and published by . This book was released on 2006 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Silicon Nanowires, Silicon Nanorods, and Magnetic Nanocrystals by : Andrew Theron Heitsch
Download or read book Synthesis and Characterization of Silicon Nanowires, Silicon Nanorods, and Magnetic Nanocrystals written by Andrew Theron Heitsch and published by . This book was released on 2010 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon nanowires, silicon nanorods, and magnetic nanocrystals have shown interesting size, shape, mechanical, electronic, and/or magnetic properties and many have proposed their use in exciting applications. However, before these materials can be applied, it is critical to fully understand their properties and how to synthesize them economically and reproducibly. Silicon nanowires were synthesized in high boiling point ambient pressure solvents using gold and bismuth nanocrystals seeds and trisilane as the silicon precursor. Reactions temperatures as low as 410°C were used to promote the solution-liquid-solid (SLS) growth of silicon nanowires. The silicon nanowires synthesis was optimized to produce 5 mg of silicon nanowires with average diameters of 30 nm and lengths exceeding 2 [mu]m by adjusting the silicon to gold ratio in the injection mixture and reaction temperature. Silicon nanorods were synthesized using a solution-based arrested-SLS growth approach where gold seeds, trisilane, and a dodecylamine were vital to the success. Dodecylamine was found to prevent gold seed coalescence at high temperatures -- creating small diameter rods -- and bond to the crystalline silicon surface -- preventing silicon nanorod aggregation. Furthermore, an etching strategy was developed using an emulsion of aqua regia and chloroform to remove the gold seeds from the silicon nanorods tip. A thin silicon shell surrounding the gold seed of the silicon nanorod was subsequently observed. Multifunctional colloidal core-shell nanoparticles of iron platinum or iron oxide encapsulated in fluorescent dye doped silica shells were also synthesized. The as-prepared magnetic nanocrystals are initially hydrophobic and were coated with a uniform silica shell using a microemulsion approach. These colloidal heterostructures have the potential to be used as dual-purpose tags, exhibiting a fluorescent signal that could be combined with enhanced magnetic resonance imaging contrast. Compositionally-ordered, single domain, antiferromagnetic L12 FePt3 and ferromagnetic L10 FePt nanocrystals were synthesized by coating colloidally-grown Pt-rich or stoichiometricly equal Fe-Pt nanocrystals with thermally-stable SiO2 and annealing at high temperature. Without the silica coating, the nanocrystals transform predominately into the L10 FePt phase due to interparticle diffusion of Fe and Pt atoms. Magnetization measurements of the L12 FePt3 nanocrystals revealed two antiferromagnetic transitions near the bulk Neél temperatures of 100K and 160K. Combining L12 FePt3 nanocrystals with L10 FePt nanocrystals was found to produce a constriction in field-dependent magnetization loops that has previously been observed near zero applied field in ensemble measurements of single domain silica-coated L10 FePt nanocrystals. Dipole interactions between FePt@SiO2 nanoparticles with varying SiO2 shell thickness was also explored.
Book Synopsis Silicon-based Micro- and Nanoparticles by : Min Lin
Download or read book Silicon-based Micro- and Nanoparticles written by Min Lin and published by . This book was released on 2022 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Silicon-silicon Double Bonded Compounds and Their Oxidized Derivatives by : Michael Joseph Michalczyk
Download or read book Synthesis and Characterization of Silicon-silicon Double Bonded Compounds and Their Oxidized Derivatives written by Michael Joseph Michalczyk and published by . This book was released on 1984 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gas‐phase Synthesis of Silica Nanoparticles: Reaction Kinetics, Synthesis and Characterization by : Ali Abdali
Download or read book Gas‐phase Synthesis of Silica Nanoparticles: Reaction Kinetics, Synthesis and Characterization written by Ali Abdali and published by Cuvillier Verlag. This book was released on 2014-04-25 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gas-phase kinetics of the decomposition of tetraethoxysilane (TEOS) and hexamethyldisiloxane (HMDSO) and the formation and growth of silica nanoparticles were studied. The kinetics study was carried out in shock-heated gases with species measurements by high-repetition-rate time-of-flight mass spectrometry. The mass spectra indicate the formation of Si(OH)4 from the decomposition of TEOS while during HMDSO decomposition several Silicon-containing species were found, such as Si atoms, SiO and SiCH3. The ignition-delay time of the precursors in oxygen-containing bath gases was studied by observing the OH* emission signal behind the reflected shock wave. The ignition delay times of TEOS and HMDSO are strongly temperature dependent and the Arrhenius parameters were determined. Silica-particle formation and growth from TEOS and HMDSO were investigated in a hybrid microwave-plasma hot-wall reactor and a low-pressure premixed H2/O2/Ar flame reactor by in-situ and ex-situ measurements. Particle sizes distributions were determined by particle mass spectrometry and the spatial gas-phase temperature distribution was measured with multi-line NO-LIF thermometry. The present research work provides data and new understanding of TEOS and HMDSO decomposition kinetics and particle formation and growth of silica nanoparticles in the gas-phase. These data can be used as input for computational fluid dynamics simulations and hence for the design of reactors for the gas-phase synthesis of highly specific nanoparticles.
Book Synopsis Photothermal Aerosol Synthesis and Characterization of Silicon Nanoparticles by : Xuegeng Li
Download or read book Photothermal Aerosol Synthesis and Characterization of Silicon Nanoparticles written by Xuegeng Li and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lipid-based Nanoparticles for Magnetic Resonance Molecular Imaging by : Willem Jan Menno Mulder
Download or read book Lipid-based Nanoparticles for Magnetic Resonance Molecular Imaging written by Willem Jan Menno Mulder and published by . This book was released on 2006 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fluorescent Nanodiamonds by : Huan-Cheng Chang
Download or read book Fluorescent Nanodiamonds written by Huan-Cheng Chang and published by John Wiley & Sons. This book was released on 2018-11-12 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most comprehensive reference on fluorescent nanodiamond physical and chemical properties and contemporary applications Fluorescent nanodiamonds (FNDs) have drawn a great deal of attention over the past several years, and their applications and development potential are proving to be manifold and vast. The first and only book of its kind, Fluorescent Nanodiamonds is a comprehensive guide to the basic science and technical information needed to fully understand the fundamentals of FNDs and their potential applications across an array of domains. In demonstrating the importance of FNDs in biological applications, the authors bring together all relevant chemistry, physics, materials science and biology. Nanodiamonds are produced by powerful cataclysmic events such as explosions, volcanic eruptions and meteorite impacts. They also can be created in the lab by high-pressure high-temperature treatment of graphite or detonating an explosive in a reactor vessel. A single imperfection can give a nanodiamond a specific, isolated color center which allows it to function as a single, trapped atom. Much smaller than the thickness of a human hair, a nanodiamond can have a huge surface area that allows it to bond with a variety of other materials. Because of their non-toxicity, nanodiamonds may be useful in biomedical applications, such as drug delivery and gene therapy. The most comprehensive reference on a topic of rapidly increasing interest among academic and industrial researchers across an array of fields Includes numerous case studies and practical examples from many areas of research and industrial applications, as well as fascinating and instructive historical perspectives Each chapter addresses, in-depth, a single integral topic including the fundamental properties, synthesis, mechanisms and functionalisation of FNDs The first book published by the key patent holder with his research group in the field of FNDs Fluorescent Nanodiamonds is an important working resource for a broad range of scientists and engineers in industry and academia. It will also be a welcome reference for instructors in chemistry, physics, materials science, biology and related fields.
