Zhang Xunqiang, Xie Wenqing, Du Sinan, Wang Huaguang, Zhang Zexin
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China.
Langmuir. 2022 Apr 12;38(14):4389-4395. doi: 10.1021/acs.langmuir.2c00123. Epub 2022 Mar 29.
Inorganic particles with photocatalytic properties are excellent candidates for the fabrication of micromotors. To achieve self-propulsion, the geometric and chemical symmetries of inorganic particles should be broken. However, the synthesis of micromotors with different geometric and chemical symmetries remains challenging. In this paper, a simple synthesis method is proposed to prepare rod-shaped micromotors with different patches, leading to distinct geometric and chemical symmetries. The micromotors are composed of zinc oxide (ZnO) microrods partially patched with polysiloxanes at different positions. The patches of the micromotors can be roughly regulated by varying the amount of siloxanes used in the synthesis. These micromotors are propelled in HO solution by an ionic self-diffusiophoresis mechanism, which exhibits two motion modes, including linear motion and circular motion, due to different patch positions. Moreover, the degradation of organic dyes by the micromotors depending on the patches is demonstrated.
具有光催化特性的无机颗粒是制造微马达的理想候选材料。为实现自推进，无机颗粒的几何和化学对称性应被打破。然而，合成具有不同几何和化学对称性的微马达仍然具有挑战性。本文提出了一种简单的合成方法来制备具有不同斑块的棒状微马达，从而产生不同的几何和化学对称性。这些微马达由氧化锌（ZnO）微棒组成，在不同位置部分被聚硅氧烷覆盖。微马达的斑块可以通过改变合成中使用的硅氧烷的量来大致调节。这些微马达在HO溶液中通过离子自扩散电泳机制推进，由于斑块位置不同，呈现出两种运动模式，包括直线运动和圆周运动。此外，还展示了微马达对有机染料的降解取决于斑块情况。
