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 44 for “"single particles"”.
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Light scattering: from ensembles to single particles
… to be inverted simultaneously. Next, a novel single-particle tracking configuration is presented for simultaneous dual colour scattering inside hollow-core anti-resonant (HC-ARF) fibres at microsecond timescales. Simultaneous monitoring of multiple scattering signals allows observation of …
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Scale closure in upper ocean optical properties : from single particles to ocean color
… and optical cross-sections of individual particles, based on a method developed in the laboratory using phytoplankton cultures. Individual particle measurements were used to interpret variability in concurrently measured bulk optical properties in New England continental shelf waters in …
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Microfluidic Transverse AC Electrophoresis Systems for Multiparameter Characterization of Single Particles and Cells
… methods, spanning both ensemble and single particle characterization techniques, there remains a critical need for more precise and robust methods capable of multiparameter characterization at the single-particle level, particularly for heterogeneous biological particles. This …
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Scale closure in upper ocean optical properties : from single particles to ocean color
… and optical cross-sections of individual particles, based on a method developed in the laboratory using phytoplankton cultures. Individual particle measurements were used to interpret variability in concurrently measured bulk optical properties in New England continental shelf waters in …
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Real time analysis of atmospheric single particles in urban environments using aerosol time of flight mass spectrometry
… the size-resolved chemical composition of single particles in real-time an ATOFMS was deployed at urban background sites in Paris and Barcelona during the MEGAPOLI and SAPUSS monitoring campaigns respectively. The particle types detected during MEGAPOLI included several carbonaceous …
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Characterisation of atmospheric single particles in industrial and regional background environments using aerosol time of flight mass spectrometry
The composition of atmospheric particles is an important factor in determining their impact on climate and health. In this study, an aerosol time-of-flight mass spectrometer (ATOFMS) was used to measure the chemical composition of ambient single particles at two contrasting locations – an …
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Optical measurements of nano-aluminum combustion in a heterogeneous shock tube and in a flat flame burner
… by measuring the heat release of the particles rather than relying on photon emission by the burning particles. By tracking the temperature of the ambient gases within the shock tube, specifically the OH radical chosen for its limited participation in the combustion event, a comparison …
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Encapsulation of particles using brittle coatings for subterranean applications
… of a brittle and moisture-resistant coating for particles, which reduce or "break" the viscosity of fracturing fluids, was explored.;The viscosity-reducer was ammonium persulfate. Polyurethane and acrylate coatings were investigated. The coated particles were assessed for dissolution in water …
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Synthesis and Characterization of Novel Polyethers and Polypeptides for Use in Biomedicine and Magnetic Resonance Imaging
… with ritonavir yielding well-controlled nanoparticles. Poly(L-glutamic acid) is comprised of naturally occurring L-glutamic acid repeating units that are linked together with amide bonds. In this research, we have prepared magnetic block ionomer complexes based on poly(ethylene …
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Structure of the electron diffusion region in magnetic reconnection with small guide fields
… are accounted for by studying the motion of single particles in the field geometry. Finally, the geometry of small guide field reconnection is shown to be highly sensitive to the mass ratio.
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A reduced-turbulence, reduced-entrainment electrostatic precipitator
… to have little effect on the reentrainment of single particles, but appears to reduce reentrainment of an established dust layer. Reentrainment was shown to be an important concern primarily for particles greater than three micrometers in diameter. This research strongly indicated the …
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Harmonic Acoustics for Single Cell Manipulation
<p>Technologies that can manipulate single particles and cells in a high precision, high throughput and contact-free manner have long been motivated by applications in materials science, physics, medicine, and the life sciences. However, current single cell manipulation tools, such as atomic force …
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A Numerical Scheme for Mullins-Sekerka Flow in Three Space Dimensions
… phases. A coarsening process occurs, and large particles grow while smaller particles eventually dissolve. Single particles become spherical. This process is described by evolving harmonic functions within the two phases with the moving interface driven by the jump in the normal derivatives of …
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Single-Molecule Characterization of Photophysical and Colloidal Properties of Biocompatible Quantum Dots
… properties were investigated at the ensemble and single-molecule level for CdSe or CdTe core, CdSe/ZnS core-shell and surface-modified NCs. The use of NCs as fluorescent probes in biological applications requires various synthesis routes and surface modifications to enable solubility in aqueous …
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Understanding the chemistry of atmospheric particles using single particle mass spectrometry
This thesis explores ways in which single particle mass spectrometry can be extended, whether through hardware improvements, or through the use of advanced data processing techniques to provide new kinds of aerosol chemistry measurements. Most of this work has been carried out using the Particle …
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Optical tweezers for signal detection and micromanipulation
… Raman (SERRS) measurements could be made on a single bead whilst it was simultaneously trapped in 532 nm optical tweezers. The length of time over which the SERRS signal could be recorded was increased, from milli-seconds to minutes, by using 1064 nm optical tweezers and introducing second …
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Revealing ion transfer kinetics and charge dynamics at operating battery materials through scanning electrochemical microscopy
… tools that can access localized or single particle information will help breakdown complexities across the heterogeneous and particulate composition of electrodes applied in real batteries. Among emerging surface tools, scanning electrochemical microscopy (SECM) provides broad …
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An algebraic reconstruction technique (ART) for the synthesis of three-dimensional models of particle aggregates from projective representations
… (ART) to synthesize composite 3-D granular particles from statistically obtained 3-D shape descriptors of the particles in an aggregate mixture. This thesis extends previous work where it was demonstrated that the 3-D shape characteristics of particles in an aggregate mixture can be …
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Manufacturing of agarose-based chromatographic adsorbents with controlled pore and particle size
… temperature, on the structure of the resulting particles was investigated. Three characterization methods, Atomic Force and cryo-Scanning Electron microscopy, as well as mechanical testing of single particles where used to quantify the effect of these parameters on the pore size/size …
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Radiative interactions: I. Light scattering and emission from irregular particles. II. Time dependent radiative coupling of an atmosphere-ocean system
… this dissertation, radiative interactions with single irregular particles are simulated. We first introduce the basic method and techniques of Finite- Difference Time-Domain method(FDTD), which is a powerful method to numerically solve Maxwell's equations with high accuracy. To improve the …
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