Chen Yimeng, Xu Borui, Mei Yongfeng
Department of Materials Science, State Key Laboratory of ASIC and Systems, Fudan University, Shanghai, 200433, China.
Chem Asian J. 2019 Jul 15;14(14):2472-2478. doi: 10.1002/asia.201900300. Epub 2019 May 14.
Catalytic tubular micro/nanomachines convert chemical energy from a surrounding aqueous fuel solution into mechanical energy to generate autonomous movements, propelled by the oxygen bubbles decomposed by hydrogen peroxide and expelled from the microtubular cavity. With the development of nanotechnology, micro/nanomotors have attracted more and more interest due to their numerous potential for in vivo and in vitro applications. Here, highly efficient chemical catalytic microtubular motors were fabricated via 3D laser lithography and their motion behavior under the action of driving force in fluids was demonstrated. The frequency of catalytically-generated bubbles ejection was influenced by the geometrical shape of the micro/nanomotor and surrounding chemical fuel environment, resulting in the variation in motion speed. The micro/nanomotors generated with a rocket-like shape displayed a more active motion compared with that of a single tubular micro/nanomotor, providing a wider range of practical micro-/nanoscale applications in the future.
催化管状微纳机器将周围水相燃料溶液中的化学能转化为机械能，以产生自主运动，由过氧化氢分解产生的氧气气泡推动并从微管腔中排出。随着纳米技术的发展，微纳马达因其在体内和体外应用的众多潜力而受到越来越多的关注。在此，通过三维激光光刻制造了高效化学催化微管马达，并展示了它们在流体中驱动力作用下的运动行为。催化产生的气泡喷射频率受微纳马达的几何形状和周围化学燃料环境的影响，导致运动速度发生变化。与单个管状微纳马达相比，呈火箭状的微纳马达表现出更活跃的运动，为未来更广泛的实际微纳尺度应用提供了可能。
