Multilayer nanorods exhibit enhanced propulsion under ultraviolet light, suggesting a novel propulsion mechanism.
TiO/Pt/Au multilayer nanorods were fabricated by template-assisted electrodeposition and thermal conversion of an electrodeposited TiO precursor.Layer thicknesses were tuned by charge and deposition time to yield reproducible multilayers.The nanorods autonomously propelled in 2 wt% HO via self-electrophoresis, showing higher velocity under ultraviolet irradiation than in the dark.Reversible ON/OFF velocity modulation was observed.The enhanced propulsion is consistent with photocatalytic reactions at the TiO segment that are suggested to increase the self-electrophoretic driving force, although direct phase identification of TiO and full mechanistic assignment await further characterization.
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Shitanda et al. (2026) studied this question.
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