2D‐Material‐Integrated Micromachines: Competing Propulsion Strategy and Enhanced Bacterial Disinfection
2D‐Material‐Integrated Micromachines: Competing Propulsion Strategy and Enhanced Bacterial Disinfection
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2D—材料—集成微机械：竞争推进策略和增强细菌消毒
DOI：
10.1002/adma.202203082
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发表时间：
2022
影响因子：
29.4
通讯作者：
Fan, Donglei Emma
中科院分区：
文献类型：
--
作者：
Huang, Yun;Guo, Jianhe;Li, Yufan;Li, Huaizhi;Fan, Donglei Emma
二维过渡金属二硫化物材料，如二硫化钼（MoS2）由于其在光电子学、储能和可穿戴设备中应用的卓越结构赋予的电子、催化和机械性能而受到了极大的关注。然而，二维材料在微/纳米机器、电机和机器人领域的研究很少。在这里，mos2和锐钛矿TiO2成功地集成到一个原始的单侧开放的空心微机器中，这表明TiO2基微机器对可见光区的光吸收增加，并且首次观察到响应离子介质的运动加速。实验和理论分析都表明，MoS2/ tio2异质结独特的II型带隙排列解释了由于竞争推进机制而观察到的独特运动。此外，通过利用MoS2/TiO2的化学性质，微型机器可以在一小时内实现99.999%大肠杆菌溶解的日光动力水消毒。这项研究表明，二维材料在创造一类新的微/纳米机器和机器人方面提供了丰富的机会。
2D transition‐metal‐dichalcogenide materials, such as molybdenum disulfide (MoS2) have received immense interest owing to their remarkable structure‐endowed electronic, catalytic, and mechanical properties for applications in optoelectronics, energy storage, and wearable devices. However, 2D materials have been rarely explored in the field of micro/nanomachines, motors, and robots. Here, MoS2with anatase TiO2is successfully integrated into an original one‐side‐open hollow micromachine, which demonstrates increased light absorption of TiO2‐based micromachines to the visible region and the first observed motion acceleration in response to ionic media. Both experimentation and theoretical analysis suggest the unique type‐II bandgap alignment of MoS2/TiO2heterojunction that accounts for the observed unique locomotion owing to a competing propulsion mechanism. Furthermore, by leveraging the chemical properties of MoS2/TiO2, the micromachines achieve sunlight‐powered water disinfection with 99.999%Escherichia colilysed in an hour. This research suggests abundant opportunities offered by 2D materials in the creation of a new class of micro/nanomachines and robots.