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Effect of surfactant concentration in 5% H2O2 solution on average speed of Pt-microtubes (a) and Pt covered microparticles (b); dotted lines depict the maximum speed at surfactant free conditions. Inset: chemical structures of Triton X (nonionic), sodium dodecyl sulfate (anionic), benzalkonium chloride (cationic), FIT (mixture of surfactants).
