Rückner Gunnar, Kapral Raymond
Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada.
Phys Rev Lett. 2007 Apr 13;98(15):150603. doi: 10.1103/PhysRevLett.98.150603.
Self-propelled motion of a chemically powered nanodimer is discussed. The nanodimer comprises two linked spheres, one of which has equal interactions with A and B solvent species but catalyzes the reaction A-->B. The other sphere is not chemically active but interacts differently with the two species. The nonequilibrium concentration gradient generated at the catalytic end, in conjunction with the force difference at the noncatalytic end, leads to directed motion. The model mimics features of experimentally studied synthetic nanorod motion. Particle-based simulations and analytical estimates of the velocity provide insight into the nature of nanomotor directed motion.
讨论了化学驱动纳米二聚体的自推进运动。该纳米二聚体由两个相连的球体组成，其中一个与A和B溶剂种类具有相同的相互作用，但催化反应A→B。另一个球体没有化学活性，但与这两种物质的相互作用不同。在催化端产生的非平衡浓度梯度，与非催化端的力差相结合，导致定向运动。该模型模拟了实验研究的合成纳米棒运动的特征。基于粒子的模拟和速度的分析估计为纳米马达定向运动的本质提供了见解。
