张健华、牟方志等撰写的论文被ACS Appl. Mater. Interf.正式接收发表
原文详细摘要如下：The key principle of designing a micro/nanomotor is to introduce asymmetry to a micro/nanoparticle. However, micro/nanomotors designed based on external asymmetry and inherent chemical and geometrical asymmetry usually suffer from tedious small-scale preparation, high cost and/or complexity of external power and control devices, making them facing insurmountable hurdles in practical applications. Herein, considering the possible distinct properties of different polymorphs, we propose a novel design strategy of simple-structured micromotors by introducing inherent asymmetry in crystalline phases. The inherent phase asymmetry can be easily introduced in spherical TiO2 particles by adjusting calcination temperature to control the phase transition and growth of primary grains. The as-designed anatase/rutile TiO2 micromotors not only show efficient autonomous motions controlled by light in liquid media stemming from the asymmetric surface photocatalytic redox reactions, but also have a promising application in environmental remediation due to their high photocatalytic activity in “on-the-fly” degradation of organic pollutants, facile large-scale fabrication and low cost. The proposed design strategy may pave the way for the large-scale productions and applications of micro/nanomotors.