Abstract
We report a one-step synthesis of lanthanoid-doped BiVO(4) microswimmers that integrate photon upconversion and light-driven propulsion within a single particle. Yb(3+)/Er(3+) doping enables near-infrared-to-visible upconversion, while BiVO(4) provides photocatalytic propulsion. This straightforward strategy avoids multi-component assembly and opens up new opportunities for designing multifunctional photoactive microswimmers with intrinsic luminescence for potential use in environmental and biomedical applications.