Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"Core-shell particles"”.
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Structure, Dynamics and Association of Thermosensitive Core-Shell Particles
… dynamics and association of thermosensitive core-shell particles. The particles consist of a solid core of poly(styrene) with a thin layer of poly(N-isopropylacrylamide) (PNIPAM) onto which a network of PNIPAM is affixed. The degree of crosslinking of the PNIPAM shell effected by the …
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Development of Polymer-Biomolecule Core-Shell Particles For Biomedical Applications
… to introduce biomolecules around polymeric nanoparticles (NPs) is critical for targeted delivery of therapeutic or diagnostic agents. Although polymeric NPs have been well established, problems such as toxicity, stability, and immunoresistance remain potential concerns. The first part of this …
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Desenvolvimento de suportes enzimáticos por polimerização simultânea em suspensão e emulsão
… the specific area and porosity of the produced particles. Thus, it was observed that, by reducing the duration of the suspension step, core-shell particles of P(S-co-DVB) exhibiting high specific area (up to 50 m²/g) could be produced. The mechanical stability of the produced particles was also …
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Engineering the Plasmon Resonance of Gold Nanoshells for Biological Applications
… gold to silica colloids on the formation of nanoshell precursor seed particles thereby leading to the optimization of the process by which gold nanoshells are formed. With a focus on nanoshells for the thermal ablation of cancer cells, 104.5 nm core shell particles having a peak resonance at 940 …
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Particle sensors based on amplified quenching of conjugated polymers for biosensing applications
… these attributes in a biosensor design, CPbased core-shell particles have been investigated as potential material platforms to detect protease activity. CP-based particles have greater sensitivity versus CPs in solution due to interchain and intrachain interactions afforded in the solid state. …
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Surface Modification of Spherical Particles with Bioactive Glycopolymers
… polymerization or ATRP, respectively. The particles were able to stabilize gold nanoparticles to form catalytically active hybrid particles that were capable of reducing p-nitrophenol in the presence of NaBH4. Investigation of the interactions between acetylglucosamine-displaying polymers …
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Preparation and characterization of bimetallic core-shell nanoparticles
… synthetic techniques for colloidal metal particles. This work reports two novel techniques for synthesising bimetallic core-shell nanoparticles. The first technique is the chemical deposition of transition metal salts onto gold nanoparticle seeds. The transition metals used were platinum, …
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Studies of Passive and Active Plasmonic Core-Shell Nanoparticles and their Applications
Coated nanoparticles (CNP) are core-shell particles consisting of differing layers of epsilon positive (EP) and epsilon negative (ENG) materials. The juxtaposition of these EP and ENG materials can lead to the possibility of coupling incident plane waves to surface plasmon resonances (SPR) for …
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Catalytic Studies Of Noble Metal Nanocatalysts Using Single-Molecule Fluorescence Microscopy
Noble metal nanoparticles are an important class of catalysts. However they are inherently heterogeneous, which makes studying them at the single-particle level desirable, as it then becomes possible to quantify these differences. A highthroughput fluorescence microscopy technique was developed in …
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Polymer and metallodielectric based photonic crystals
… structures. The fabrication of MDPCs with Au nanoparticles attached to the PMMA spheres core–shell particles is described. Various alternative procedures for the fabrication of photonic crystals and MDPCs are described and preliminary results on the use of an Au-based MDPC for surface-enhanced …
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Improving Impact Properties of Novatein through Polymer Blending and Reactive Extrusion
… Novatein was blended with either elastomeric core-shell particles, polyethylene (PE), or biodegradable polybutylene adipate-co-terephthalate (PBAT) using twin-screw extrusion to allow for sufficient mixing and residence time for chemical interactions or reactions to form. Materials were …
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Magnetic Nanoparticles Based on Iron: Synthesis, Characterization, Design, and Application
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: α-iron, iron oxide, and iron carbide or cementite. The synthesis of several core-shell particles including cementite-iron …
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Microscale polymeric-based technologies for controlled vaccine delivery
… a locally injectable microparticle system with a core-shell microstructure made from a novel 3D printing process compatible with biodegradable polymers. These microparticles can be used for delayed, pulsatile release of vaccines, therefore reducing the number of administrations to a single one. We …
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Optomechanical anisotropy in nanoengineered polymer photonic crystals
… of 200nm monodisperse, polymer spheres with a core-shell structure. Determination of the assembly geometry through light diffraction experiments reveals a highly symmetric structure of close-packed, core-shell particles, with its orientation governed by the directionality imposed by the …
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Photochemical Tuning of Surface Plasmon Resonances in Metal Nanoparticles
Illuminated metal nanoparticles (MNPs) feature collective electron oscillations (so-called localized surface plasmons or LSPs) which facilitate concentrating light-matter interactions to length scales below the diffraction limit. Part I of this book describes two applications of this confinement …
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The Optimization of Gold Coated Iron Nanoparticle Synthesis Methods
… method for synthesizing gold-coated iron nanoparticles. The gold coating provides a means to functionalize the nanoparticle for use in a large variety of biosensors, and the magnetic nature of the particles allow for concentration of analytes in a sample, which improves inherent biosensor …
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Rheology of polyelectrolyte multilayer modified suspension
… for which the individual motion of single particles is strongly restricted by the neighboring particles. Then, the suspensions show simultaneously elastic and viscous properties with dominating solid-like behavior at rest, and yield and flow under large applied stresses. The first …
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New thin shell silica particles and HILIC phases for liquid chromatography: synthesis, characterisation and functionalisation
… of interest in the use of superficially porous particles with a solid core and a porous shell (also known as fused core, core-shell or porous shell) for fast and highly efficient separation of low molecular weight solutes to large and complex analytes, while avoiding excessive back pressure. In …
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Caloric effects in ferroic materials
… thermal mass for cooling. Here, LCMO || BTO core-shell particles with different compositions were investigated to see whether they present similar behaviour to the film-substrate heterostructures, while simultaneously providing larger thermal mass. The second study focused on surface …
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Design, Synthesis and Characterization of Porous Silica Nanoparticles and Application in Intracellular Drug Delivery
… bacteria. Among them, the porous silica nanoparticles deserve special attention due to their multifunctional properties such as high drug loading, controlled drug release and targeting of organs/cells. A review of the functional requirements of an ideal drug delivery system is provided. A …
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