School of Chemistry and Environment, Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Guangdong Provincial Engineering Technology Research Center for Materials for Energy Conversion and Storage , South China Normal University , Guangzhou 510006 , China.
Research Institute of Materials Science , South China University of Technology , Guangzhou 510640 , China.
ACS Appl Mater Interfaces. 2019 Feb 13;11(6):6201-6207. doi: 10.1021/acsami.8b17563. Epub 2019 Jan 31.
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 (CuO@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such CuO@N-CNT micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus micromotors usually fueled by toxic HO 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 CuO@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.
基于葡萄糖供能的合成微/纳米马达因其燃料的生物相容性而在众多实际应用中受到高度关注。然而，目前所有基于葡萄糖供能的微/纳米马达都基于酶催化驱动机制，这种机制通常受到严格的操作条件和较弱的推进特性的限制，极大地限制了它们的应用。在这里，我们报告了一种高效的葡萄糖供能的氧化亚铜@氮掺杂碳纳米管（CuO@N-CNT）微米马达，它可以通过环保的可见光光催化来激活。这种 CuO@N-CNT 微米马达的速度可以达到 18.71 μm/s，与通常由有毒 HO 燃料供能的传统 Pt 基催化的詹纳斯微米马达相当。此外，通过多种方法可以有效地调节这些马达的速度，例如调整微米马达内的 N-CNT 含量、葡萄糖浓度或光强度。此外，CuO@N-CNT 微米马达表现出高度可控的负趋光性（远离光源）。这种在生物环境中具有出色推进性能的马达，以及无线、可重复和光调制的三维运动控制，对于未来的实际应用极具吸引力。
