Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 6, Pages 6201-6207Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b17563
Keywords
micromotors; glucose; visible light; Cu2O; N-CNTs
Funding
- Natural Science Foundation of China [21805096]
- Natural Science Foundation of Guangdong Province [2018A030313358, 2017A030310432]
- National Natural Science Foundation of China [21674039, 21471061, 21671071]
- Applied Science and Technology Planning project of Guangdong Province [2015B010135009, 2017B090917002]
- Innovation team project of Guangdong Ordinary University [2015KCXTD005]
- great scientific research project of Guangdong Ordinary University [2016K2DXM023]
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Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu2O@N-CNT micromotors can reach up to 18.71 mu m/s, which is comparable to conventional Pt-based catalytic Janus micromotors usually fueled by toxic H2O2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the micromotors, glucose concentrations, or light intensities. Furthermore, the Cu2O@N-CNT micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications.
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