Cathodic arc plasma deposition was used to coat Al2O3 powder (mesh size 60) with platinum. the power particles were moved during deposition using a mechanical system operating at a resonance frequency of 20 Hz. Scanning electron microscopy and auger electron microscopy show that all particles are completely coated with a platinum film having a thickness of about 100 nm. the actual deposition time was only 20 s, thus the deposition rate was very high (5 nm/s).
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