A Light‐Driven Micromotor with Complex Motion Behaviors for Controlled Release. Issue 4 (30th January 2019) - Sun, Yunyu
Abstract: Micromotor that exhibits various movement behaviors has attracted more attention in recent years. However, most researchers focus on its motion behavior and few have studied the fluid flow surrounding it. In this work, a novel micromotor with both controlled motion behavior and surrounding fluid flow, which is driven by near‐infrared (NIR) light based on the unique Marangoni effect caused by the light irradiation of its constituent, i.e., polypyrrole (PPy), is reported. Interestingly, these motion behaviors and the surrounding fluid flow can be easily switched by adjusting the incident angle of the NIR laser. This unique property may have potentials in different fields. Among others, its application in remotely controlled targeted delivery and release is demonstrated. Abstract : A novel polypyrrole‐based micromotor driven by near‐infrared light is reported. The controllable motion behaviors, including translational motion only, surface water flow only, and the combined translational motion with water flow, can be precisely tuned by the light irradiation angle, which can be utilized for the light‐controlled drug delivery and release.