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 19 of 19 for “"Nano-sized particles"”.
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Numerical Study of Acoustophoretic and Thermophoretic Aggregation of Micro- and Nano-Sized Particles
Precise manipulation of bio-micro/nanoparticles, including cells, platelets, bacteria, and extracellular vesicles, is critical for tumour diagnostics, infectious disease detection, and cell analysis. The acoustofluidic aggregation method shows its significant advantages in microparticle …
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Drug nanosizing using microfluidic reactors. Development, characterisation and evaluation of corticosteroids nano-sized particles for optimised drug delivery.
Over recent years the delivery of nanosized drug particles has shown potential in improving bioavailability. Drug nanosizing is achieved by ¿top-down¿ and by ¿bottom-up¿ approaches. Owing to limitations associated with the top-down techniques, such as high energy input, electrostatic effects, broad …
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Experimental studies of the thermoelectric properties of microstructured and nanostructured lead salts
… of PbTe and PbSe were prepared by hot pressing nano-size and micro-sized particles and the thermal diffusivity, the Seebeck coefficient, and the electric conductivity of the samples were measured. The samples made from the nano-sized particles showed no reduction in thermal conductivity and no …
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Characterization of particles created by laser-driven hydrothermal processing
This study examined particles created by laser-driven hydrothermal processing, an innovative technique used for the ablation of submerged materials. Two naturally occurring materials, obsidian and tektite, were used as targets for this technique. Characterization of sample materials before and …
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Synthesis and Micro-Mechanical Properties Of Epoxy-Alumina Nanocomposites
… the process, structure and properties of polymer nanocomposites, mainly because of their unique properties such as high strength-to-weight ratio. Many studies have shown that the incorporation of nano-sized particles have effectively reinforced the various properties of the polymers compared to …
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Characterization of nano-scaled metal-hydrides confined in nano-porous carbon frameworks
… of metal hydrides differ between bulk and nano-sized particles. Many metal hydrides with useful volumetric and gravimetric capacities have high decomposition temperatures, but when placed in nano-sized frameworks (or templates) desorption and adsorption temperatures can be fine-tuned to …
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Modeling and characterization of thermoelectric properties of SiGe nanocomposites
… significant enhancements in ZT were reported in nanostructured materials such as superlattices mainly due to their low thermal conductivities. According to the studies on heat transfer mechanisms in nanostructures, the reduced thermal conductivity of nanostructures is mainly attributed to the …
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Laser-induced incandescence for soot diagnostics at high pressure
… measuring particle sizes and volume fractions of nano-sized particles in aerosols. These particles, as emitted by traffic in the form of soot, cause a significant health risk, as nano-sized particles can penetrate deeply into the lungs and are considered important for causing asthma, fibrosis and …
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Revestimentos a base de Ta/Al2O3 produzidos por aspersão térmica sobre substrato metálico
… the production of alumina coating infused with particles of tantalum with nano and micrometric size. The spraying equipment used is a plasma torch arc not transferred, which operating in the range of 250 A and 80 V, was able to produce enough heat to ignite aluminothermic between Ta2O5 and …
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Thermoelectric properties of silicon-germanium alloys
… enhancements in ZT have been reported in nanostructured materials such as super-lattices mainly due to their low thermal conductivities. According to the studies on heat transfer mechanisms in nanostructures, the reduced thermal conductivity of nanostructures is mainly attributed to the …
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Design and development of Brush-Arm Star Polymers for applications in drug delivery
… from the body, and development of resistance. Nano-sized particles that conjugate to or encapsulate small molecule drugs could address these issues by increasing circulation times and facilitating selective delivery of a higher drug load to the tumor, which overall can help improve efficacy and …
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Polyacrylamide nanoparticle delivery systems in photodynamic therapy
… over the clinical effect. The application of nanoparticles (NPs) in the field of drug delivery is extensively studied as a potential for delivering high payloads of drugs site selectively. They can be targeted towards, and accumulate in, tumour tissue by the enhanced permeability and retention …
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Synthesis and characterisation of CdS and PbS nanoparticles in an imidazolium based ionic liquid
Semiconductor metal sulfides nanoparticles have been prepared using the imidazolium based ionic liquid surfactant as both the stabilizer and growth modifier. The structural and morphological properties of the as-prepared nanoparticles were characterized by X-ray diffraction (XRD), transmission …
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Thermodynamics and kinetics of hydrogen storage in magnesium hydride: a theoretical study of catalyst-dopant, defect, and size effects
… hydride by decreasing size (e.g., creating nano-sized particles by ball-milling) and/or adding catalyst dopants? Thus, we need to determine accurately both the enthalpy and kinetic barriers controlling desorption, but for realistic, defected cases. Employing density functional theory (DFT) …
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Development of a nanoHydroxyapatite-collagen composite scaffold for bone tissue engineering
… by the introduction of the bioactive ceramic, nano-hydroxyapatite (nHA). In Chapter 2 of the thesis, a technique to produce non-aggregating nano-sized particles (<100 nm) of HA was developed using a novel, dispersant-aided synthesis procedure.<br/><br/>In Chapter 3, the incorporation of the …
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Quality by Design Approach to Advanced Particle Engineering, Process Optimisation and Upscaling of Electrohydrodynamic Atomisation Technology
… to have more advantages in the fabrication of nano- and micro-sized drug particulates. With the advent of the recent pandemic and huge demand for large scale industrial application of nanotechnology, there is now more emphasis on the need for further advancement and upscaling of the EHDA …
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Nanoparticle formation and coating using supercritical fluids
Jet breakup phenomenon and nanoparticle formation The focus of this dissertation is to study the SAS process to manufacture nanoparticles with minimum agglomeration, controlled size and size distribution. Solution jet breakup and solvent evaporation into supercritical fluid (SC CO_2) is studied …
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Study of micro-sized particle deposition using DEM, CFD-DEM and SPH approach
… and packing of colloids and micro or nano scale particles has become a subject of great interest due to widespread advancement of micro-scale technologies. In this thesis, several numerical analyses are performed to study the packing or self-assembly of micro or nano sized particles …
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Out of autoclave manufacturing of cfrps having multiscale reinforcement for improved interlaminar fracture toughness and multifunctional characteristics
… light of this issue, the introduction of carbon nano-particles and especially carbon nanotubes into the matrix of composites has shown considerable improvement on the fracture behaviour of the composites by introducing additional energy absorption mechanisms during fracture, thus concluding to …