南京航空航天大学机械结构力学与控制国家重点试验室郭万林研究组突破性地发现了一种常压下的全新的动电现象——拽势。科研人员通过实验发现在石墨烯表面拖动离子液滴会在石墨烯中产生沿液滴运动方向毫伏级的电压。产生的电压和液滴运动的速度成正比,与液滴所含离子种类和浓度相关,且随着石墨烯层数的增加而显著降低。实验分析和第一性原理计算表明,在 Nanjing University of Aeronautics and Astronautics, State Key Laboratory of Mechanical Structure Mechanics and Control GUO Wan-lin research team breakthrough found a common electrokinetic phenomenon - pull potential. Scientists have experimentally found that dragging ionic droplets on the surface of graphene produces a voltage in the graphene that is in the millivolt-scale along the direction of drop motion. The resulting voltage is proportional to the velocity of the droplet movement and is related to the type and concentration of ions contained in the droplet, and decreases significantly as the number of graphene layers increases. Experimental analysis and first-principles calculations show that at