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Electrospray ing & Electospinning

Electrospray ing & Electospinning. Nils André REINKE, Universitat Duisburg, BRD Seminar: Self-organized and artificial nanostructures, applied physics, summer-term 2002. Overview: I. Various kinds of spraying II. Outflow of a liquid from a capillary III. Rayleigh instability

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Electrospray ing & Electospinning

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  1. Electrospraying & Electospinning Nils André REINKE, Universitat Duisburg, BRD Seminar: Self-organized and artificial nanostructures, applied physics, summer-term 2002. Overview: I. Various kinds of spraying II. Outflow of a liquid from a capillary III. Rayleigh instability IV. The future development and application

  2. I. Various kinds of spraying Bernoulli effect sprayer Liquid suction

  3. Spraying caused by a spinning disc: Drop-mode V ...circumferential velocity Centrifugal acceleration Ligament-mode Sheet-mode

  4. Ultrasound spraying Ultrasound builder

  5. Electrospraying: + Charged droplets Nano proportions Nanoparticles & nanofibres Charged particles interact with external el.stat. Field, their flow can be driven by the field. Applications: DeskJet printers, lacquering, painting, Fuel- charger - power - cell for car engines. - More expensive

  6. II. Outflow of a liquid from a capillary Without an external field: Influences by the external el stat. Field: Equal flows

  7. Rayleigh instability caused by a droplet charge Split force Gauss theorem:

  8. Rayleigh instability caused by charged jet L nanofibre Length charge density

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