Abstract
Self-propelling micro/nano-motors have attracted great attention due to their controllable active motion and various functional attributes. To date, a variety of technologies have been reported for the fabrication of micro/nano-motors. However, there are still several challenges that need to be addressed. One of them is to endow micro/nano-motors with multi-functionalities by a facile fabrication process. Here, we present a universal approach, adopted from the emulsion templating method, for the fabrication of Janus micro-motors. With a one-step process, magnetic nanoparticles and fluorescent dyes are simultaneously embedded into the microparticles. The self-propelled motors can be used as an active label or fluorescent tracer through manipulation of their motion using magnetic guidance.
Highlights
Self-propelling motors are small autonomous devices which are capable of harvesting energy from their environment and mechanically driving themselves in fluids [1,2,3,4]
We have presented a universal approach, adopted from the emulsion templating method, for
We have presented a universal approach, adopted from the emulsion templating method, for the fabrication of Janus micro motors
Summary
Self-propelling motors are small autonomous devices which are capable of harvesting energy from their environment and mechanically driving themselves in fluids [1,2,3,4]. For tubular micro/nano-jets, a common method is to electrochemically deposit a magnetic layer of Ni between the motors’ substrate and catalytic layers, so that the movement direction can be aligned by an external magnetic field [54] Another strategy is to incorporate magnetic nanoparticles onto the motor’s body, by simple physical adsorption, which can provide magnetic properties to the motors and make the motors capable of acting as a magnetic resonance imaging (MRI) tracer in biomedical use [55].
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