Continuously Variable Regulation of the Speed of Bubble‐Propelled Janus Microcapsule Motors Based on Salt‐Responsive Polyelectrolyte Brushes,Chemistry - An Asian Journal

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Continuously Variable Regulation of the Speed of Bubble‐Propelled Janus Microcapsule Motors Based on Salt‐Responsive Polyelectrolyte Brushes
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2019-01-16 , DOI: 10.1002/asia.201801716
Yuxing Ji ₁ , Xiankun Lin ₁ , Daolin Wang ₁ , Chang Zhou ₁ , Yingjie Wu ₁ , Qiang He ₁

Affiliation

The engineering of self‐propelled micro‐/nanomotors (MNMs) with continuously variable speeds, akin to macroscopic automobiles equipped with a continuously variable transmission, is still a huge challenge. Herein, after grafting with salt‐responsive poly[2‐(methacryloyloxy)ethyltrimethylammonium chloride] (PMETAC) brushes, bubble‐propelled Janus microcapsule motors with polyelectrolyte multilayers exhibited adjustable speeds when the type and concentration of the counterion was changed. Reversible switching between low‐ and high‐speed states was achieved by modulating the PMETAC brushes between hydrophobic and hydrophilic configurations by ion exchange with ClO₄⁻ and polyphosphate anions. This continuously variable regulation enabled control of the speed in an accurate and predictable manner and an autonomous response to the local chemical environment. This study suggests that the integration of polymer brushes with precisely adjustable responsiveness offers a promising route for motion control of smart MNMs that act like their counterparts in living systems.

中文翻译：

基于盐响应性聚电解质电刷的气泡推进式Janus微胶囊电动机速度的连续可变调节

与配备有无级变速箱的宏观汽车类似，无级变速自行式微型/纳米电动机（MNM）的工程设计仍然是巨大的挑战。在此，在用盐响应性聚[2-（甲基丙烯酰氧基）乙基三甲基氯化铵]（PMETAC）刷子接枝之后，带有气泡的推进式Janus微胶囊电动机带有多层电解质，当改变抗衡离子的类型和浓度时，其速度可调节。低速和高速状态之间可逆切换通过用离子交换分离CLO调节疏水和亲水配置之间的PMETAC刷子实现₄^-和聚磷酸根阴离子。这种连续可变的调节功能可以准确，可预测的方式控制速度，并可以自动响应本地化学环境。这项研究表明，聚合物刷具有精确可调的响应度，为智能MNM的运动控制提供了一条有前途的途径，这些智能MNM的行为类似于它们在生活系统中的行为。

更新日期：2019-01-16

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