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- W1972997493 abstract "An aerosol-based process for coating the surface of arbitrary “carrier” particles with other types of (smaller) “coating” particles via mutual electrostatic attraction is described. Its practical viability was tested by depositing negatively charged 12-nm palladium particles on 250-nm silica spheres carrying a charge of approximately +40 units each. At respective concentrations of 3 to 8 × 106 particles per cm3 (with a charge fraction of about 25%) and 1 × 104 particles per cm3, the deposition process runs to completion (i.e., to neutralization of the carrier particles) within less than a minute. Comparative estimates show that electrostatically enhanced deposition rates are up to 50 times higher than purely thermal collisions. Transmission electron micrographs show a fairly uniform distribution of coating particles across the surface of the carrier particles. The electrostatic coating kinetics were determined experimentally via the charge loss of the carrier particles and compared also to numerical simulations using Zebel's model for electrostatic enhancement of the collision kernel. Measured rates were generally within 10–15% of the simulations, except for the very early stages of attachment (the first 10 s), where agreement was found to be rather sensitive to the coating particle concentration, possibly due to space charge effects. Copyright 2014 American Association for Aerosol Research" @default.
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- W1972997493 date "2013-12-13" @default.
- W1972997493 modified "2023-09-28" @default.
- W1972997493 title "An Aerosol-Based Process for Electrostatic Coating of Particle Surfaces with Nanoparticles" @default.
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- W1972997493 doi "https://doi.org/10.1080/02786826.2013.863422" @default.
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