2,782 research outputs found
Curing Behavior, Compatibility and Fracture Toughness of Bismaleimide/Tetrafunctional Epoxy Resin Blends
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Hyperspectral imaging of plasmonic nanostructures with nanoscale resolution
No full textWe report on the first realization of a hyperspectral imaging technique for surface plasmon polaritons on metallic nanostructures. The technique uses a scanning electron beam and allows for simple visualization of light emission from decoupled plasmons, providing information on decay lengths and feature sizes with nanometer resolution
Structural Evolution and Electrochemical Performance of Sputter-Deposited Cu6Sn5 Thin-Film Anodes
No full textForced convective heat transfer of 45° rib-roughened fin flows
No full textThe detailed heat transfer measurements in three side-open & bottom-sealed rectangular channels with two opposite walls roughened by 45° full staggered ribs were performed using the infrared radiometer. The present flow configuration simulated an enhanced coolant channel of the fin-type heat-sinks for cooling of electronic chipsets. The hydraulic diameter of three test channels was 14.8 mm with different length-to-gap (L/B) ratios of 21.33, 17.11 & 13.56. The influences of L/B ratio on the local & spatially averaged heat transfers over the rib-roughened surface at Reynolds numbers (Re) of 500, 1000, 2000, 3000 & 3300 were examined. A selection of heat transfer results illustrated the interactive effects between the side-profile leakage-flow & the rib-induced flow phenomena, which were L/B ratio dependent. Heat transfer levels over the rib-roughened surface consistently increased with the increase of Reynolds number or the decrease of L/B ratio. The skewed streamwise ‘‘saw-tooth’’ heat transfer variations gradually emerged over the rib-roughened surface when the Reynolds number systematically increased. Comparing with the heat transfers in the likewise channels but roughened by 90° staggered ribs, the 45° staggered ribs could further enhance heat transfers over 10% for L/B = 21.33 & 50% for L/B = 13.56. Heat transfer correlation for the spatially averaged Nusselt number over a rib-roughened fin surface was generated using Re & L/B ratio as the controlling parameters. A criterion for determining the optimal L/B ratio that could provide the maximum cooling power over a rib-roughened fin surface was subsequently derived to aid the design tools for the heat-sink selection
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No full textDuurzame ontwikkeling in het ingenieursonderwijs blijkt geen snelle conflictloze strategie voor verduurzaming. Met als gevolg dat het breder leren denken van de ingenieur in opleiding nog in de kinderschoenen staat.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Organisation & Governanc
Controlling the direction, topological charge, and spectrum of transition radiation with holographic metasurfaces
No full textWe show experimentally that wavefront - the direction, spectral composition and phase profile of light emission - stimulated by free electron injection into plasmonic and dielectric media can be controlled with high finesse using holographic nanostructures
Optical magnetic response in all-dielectric metamaterial
No full textWe experimentally demonstrate a new mechanism to achieve magnetic resonances at visible and near-infrared frequencies in purely dielectric metamaterials, realized through a coupling between pairs of closely spaced, dissimilar dielectric rods
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