【摘要】 以聚苯乙烯（PS）纳米颗粒为模板，通过模板法制备了一种光热驱动聚苯乙烯-聚苯乙烯@聚多巴胺（PS-PS@PDA）偏心纳米马达，利用扫描电子显微镜、透射电子显微镜对其形貌结构进行了表征，并评价了其光热性能和运动性能。结果表明，PS-PS@PDA偏心纳米马达由1个挤出的PS小球和1个核壳结构PS@PDA大球组成，直径分别为（134.7±12.4） nm和（229.3±6.5） nm;在近红外激光照射下，纳米马达表现出良好的光热转换性能和光热稳定性；随着激光功率密度的增加，纳米马达的扩散系数逐渐增大，当功率密度为2.0 W·cm^-2时，扩散系数达到15.57μm²·s^-1,比布朗运动的扩散系数提高了约32倍；此外，纳米马达在不同的生物介质中依然能够维持高效驱动。更多还原

【Abstract】 Taking polystyrene（PS） nanoparticles as a template, we prepared photothermal-driven polystyrene-polystyrene@polydopamine（PS-PS@PDA） eccentric nanomotors by using a template method.Moreover, we characterized the morphology by scanning electron microscopy and transmission electron microscopy, and evaluated the photothermal performance and motion performance.The results show that PS-PS@PDA eccentric nanomotor consists of a small extruded PS pellet and a large core-shell PS@PDA with the diameter of（134.7±12.4） nm and（229.3±6.5） nm, respectively.The nanomotor exhibits good photothermal conversion performance and photothermal stability under near-infrared light irradiation.With the increase of the laser power density, the diffusion coefficient of the nanomoter increases gradually.When the power density is 2.0 W·cm^-2,the diffusion coefficient reaches 15.57 μm²·s^-1,which is about 32 times higher than that of Brownian motion.In addition, the nanomotor can still maintain efficient movement in various biological media.更多还原