【摘 要】
：
Synthetic chemotactic micro/nanomotors are envisioned to actively\'seek out\'targets by following specific chemicals,but they are mainly powered by bioincompatible fuels and only show pseudochemotaxis (or advanced chemokinesis) due to their weak self-
【机 构】
：
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,International Sch
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Synthetic chemotactic micro/nanomotors are envisioned to actively\'seek out\'targets by following specific chemicals,but they are mainly powered by bioincompatible fuels and only show pseudochemotaxis (or advanced chemokinesis) due to their weak self-reorientation capabilities.Here we demonstrate that synthetic ZnO-based Janus micromotors can be powered by the alternative biocompatible fuel of CO2,and further provide the first example of self-reorientation-induced biomimetic chemotaxis using them.The ZnO-based micromotors are highly sensitive to dissolved CO2 in water,which enables the corrosion of ZnO to continuously occur by providing H+ through hydration.Thus,they can autonomously move even in water exposed to air based on self-diffusiophoresis.Furthermore,they can sense the local CO2 gradient and perform positive chemotaxis by self-reorientations under the phoretic torque.Our discovery opens a gate to developing intelligent micro/nanomotors powered by,and sensitive to,biocompatible atmospheric or endogenous gaseous chemicals for biomedical and environmental applications.
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