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- W3100394704 abstract "We use a combination of high-speed video imaging and electrical measurements to study the direct conversion of the impact energy of water drops falling onto an electrically precharged solid surface into electrical energy. Systematic experiments at variable impact conditions (initial height; impact location relative to electrodes) and electrical parameters (surface charge density; external circuit resistance; fluid conductivity) allow us to describe the electrical response quantitatively without any fit parameters based on the evolution of the drop-substrate interfacial area. We derive a scaling law for the energy harvested by such “nanogenerators” and find that optimum efficiency is achieved by matching the timescales of the external electrical energy harvesting circuit and the hydrodynamic spreading process.Received 6 March 2020Revised 15 May 2020Accepted 25 June 2020DOI:https://doi.org/10.1103/PhysRevLett.125.078301© 2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasContact line dynamicsDrop & bubble phenomenaElectric field effectsEnergy applicationsEnergy materialsEnergy researchPhysical SystemsCharged polymersLiquid-solid interfacesFluid DynamicsInterdisciplinary PhysicsPolymers & Soft Matter" @default.
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- W3100394704 date "2020-08-12" @default.
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- W3100394704 title "Energy Harvesting from Drops Impacting onto Charged Surfaces" @default.
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- W3100394704 doi "https://doi.org/10.1103/physrevlett.125.078301" @default.
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