ZnO-based micromotors fueled by CO_(2):the first example of self-reorientation-induced biomimetic chemotaxis  

作　　者：Fangzhi Mou Qi Xie Jianfeng Liu Shengping Che Lamya Bahmane Ming You Jianguo Guan 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing.International School of Materials Science and Engineering.Wuhan University of Technology,Wuhan 430070,China

出　　处：《National Science Review》2021年第11期98-105,共8页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(52073222,21875175,21975195,21705123 and 51521001);the Natural Science Foundation of Hubei Province(2019CFA048);the Fundamental Research Funds for the Central Universities(WUT:2021IVA118).

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-reorientation capabilities.Here we demonstrate that synthetic ZnO-based Janus micromotors can be powered by the alternative biocompatible fuel of C0_(2);and further provide the first example of self-reorientation-induced biomimetic chemotaxis using them.The ZnO-based micromotors are highly sensitive to dissolved C0_(2) 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 C0_(2) 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.

关 键 词：micro/nanomotors zinc oxide carbon dioxide SELF-PROPULSION CHEMOTAXIS 

分 类 号：TQ132.41[化学工程—无机化工]