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 17 of 17 for “"Particle trapping"”.
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Electrostatic Trapping as a Self-Consistent Phenomenon in Plasmas and other Collective Systems
… systems. They are coherent structures in which particles become trapped in the wave potential. These phenomena require a kinetic description i.e. a description in which the velocity distribution of the particles is taken into account. Trapping structures extend the areas in configuration space …
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Non-destructive electron microscopy through interaction-free quantum measurement
… With a scheme based on existing charged particle trapping techniques, it is demonstrated that such interaction-free measurements are possible in the presence of previously measured quantum decoherence rates, and the efficiency of the measurement scheme and the absorption probability are …
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Development of Electronic Systems for Ultrasonic Particle Manipulation
Demands to handle individual particles or particle agglomerates have been emerging in the fields of biology and chemistry, and particle trapping and manipulation with mechanical waves generated from ultrasound sources, known as “acoustic tweezing”, has gained great interest by researchers and been …
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The prediction of flux decline in cross-flow microfilters via three-dimensional fluid dynamic models of tortuous pore structure
… a focused ion beam. A wall collision model and a particle trapping model were developed for the investigation of fouling mechanisms in three dimensions. Hydrodynamic, particle-particle electrostatic, and Brownian forces as well as the wall collision model and particle trapping model were used in …
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Embedded Passivated-Electrode Insulator-Based Dielectrophoretic Chromatography
The detection and identification of particles within fluid samples is key in the prevention of the spreading of disease. This has created a growing need for devices able to successfully separate and identify multiple particles for this purpose while operating at a high enough throughput to be …
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Walking droplets confined by applied or topographically-induced potentials : dynamics and stability
… We report a hydrodynamic analog of optical trapping with the Talbot effect, showing that drops may become trapped at the extrema of waves generated in the vicinity of a linear array of pillars. We also characterize the dynamics of droplets bouncing and walking above the Faraday threshold, …
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Particle separation via the hybrid application of optical and acoustic forces
… present a useful and powerful means of handling particles or cells. Such techniques are of interest in regenerative medicine applications, and in particular the scalability of these techniques is an area of active research.<br/><br/>Optical trapping is a precise and dextrous method of …
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Pillar-supported plasmonic nanoantennas for optical nanotweezers and optical audio applications
… both significantly relax constraints for microparticle manipulation and offer a route for improved nanoparticle trapping. This thesis explores the near-field enhancement and confinement properties of arrays of pillar-supported Au bowtie nanoantennas (pBNAs), a new type of bowtie nanoantenna …
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Theoretical and experimental studies of the field-induced phenomena in flowing suspensions
… field is applied to a suspension, in which the particles and the suspending fluid have different dielectric permittivities andlor conductivities, the particles migrate towards the regions of high or low electric field strengths depending on the sign of their polarization. This phenomenon, …
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Particle Transport in Confinement: Nonlinearity, Compressibility, and Steric Effects
… we demonstrate unusual dynamics of colloidal particles driven by electrokinetic, Brownian, or magnetic forces under confinement, such as in channels and next to walls. Electrophoresis is a widely used separation method for particulates and molecules, and it is known to have a linear response …
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Development and application of the stokes trap for measurement of interparticle interactions
Embargo set by: Colleen Fallaw for item 103493 Lift date: 2019-09-29T17:48:06Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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YIELDING PHENOMENA IN MICROGEL SUSPENSIONS ACROSS LENGTH SCALES
… structures, such as fiber gels or colloidal particle gels, or densely packed microgels—microscopic, swollen, cross-linked polymer particles. Understanding the connections among structure, microscopic behaviors, and macroscopic properties is critical for developing advanced and sustainable …
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Frequency chirping of energetic particle driven modes in tokamaks; Self-consistent modelling and simulation
… unstable plasma wave driven by energetic particles may lead to the emergence of chirping waves. In toroidal configurations, these waves can lead to ejection of the particles from the hot core of the plasma and degrade the machine performance. Therefore, it is essential to develop theory …
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Frequency chirping of energetic particle driven modes in tokamaks; Self-consistent modelling and simulation
… unstable plasma wave driven by energetic particles may lead to the emergence of chirping waves. In toroidal configurations, these waves can lead to ejection of the particles from the hot core of the plasma and degrade the machine performance. Therefore, it is essential to develop theory …
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Design and construction of a device for light scattering studies on airborne particles
… of forced oscillations on the motion of the particle dispersed in a gas flow is given in Chapter 2. Also the most important particle parameters are introduced. A review of the particle/fluid interaction in laminar air flows and the response of the particle is presented. In Chapter 3 the …
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Plasmonic nanoantennas for multipurpose particle manipulation and enhanced optical magnetism
… both significantly relax constraints for microparticle manipulation and offer a route for improved nanoparticle trapping. In addition, resonant optical absorption in plasmonic devices leads to considerable heat generation, which in turn can induce convective flow in the fluid environment …
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The Mechanism and Timescales of Soil Formation in the Hyper-arid Atacama Desert, Chile
… of soil sequence featured by a continuous trapping of atmospheric dust and salts and the salt segregation into discrete ionic zones, 3) termination of soil accretion due to the formation of surface blocky layer, and 4) unexpected alteration of soil accumulation induced by anthropogenic …