多层核壳结构液态金属纳米分子马达的制备及其化学驱动性能

打开文本图片集

中图分类号：0781 文献标志码：A

Preparation and Chemical Propulsion Performance of Multilayer Core-Shell Liquid Metal Nanomolecular Motors

GUO Huiru， REN Long，GUAN Jianguo （The International Demonstration College of Materials Science and Engineering， WuhanUniversityof Technology，Wuhan 43Oo7O，Hubei，China）

Abstract：To investigate thechemicaldrivingperformance of nanomolecular motors，，thecore-shelliquid metalnanomolecular motor wasdesignedand fabricated，andits motionbehaviorin hydrogen peroxide solution wasstudied.The liquid metal nanomolecular motors coated with polydopamine/polyethyleneimine polymerlayer wereprepared byultrasonicand in-situ polymerization.Subsequently，theplatinumnanoparticleswereuniformlyloadedonto thesurfacebyin-situgalvanic replacement reaction，and the liquid metal nanomolecular motors with multilayer core-shell structure were successfully prepared.The microstructureand chemical composition of the liquid metal nanomolecular motors were characterized，and the motion characteristics of liquid metal nanomolecular motors in hydrogen peroxide solutions of varying concentrations were systematicallyinvestigated andanalyze.The resultsshow that the as-prepared liquid metal nanomolecular motors exhibit a multi-shell core-shell structure with particle size of 100～150nm ，which consists of liquid metal core，polymer layerand platinum particle layer as theshellayer.In aqueous solutionscontaining hydrogen peroxide，thesurfacecoated platinum layer can catalyze the decompositionof hydrogen peroxide，forming aconcentration gradientof decomposition products around the nanomolecular motors，leading to enhanced difusion behavirand demonstrating excellntand stable chemical propulsion performance.

Keywords： liquid metal;； micro- and nanomolecular motor；core-shell structure；chemical propulsion

微纳米分子马达（MNMs）是一种将周围环境中的光能[1]、电能[2]、磁能[3]、化学能[4-6]等其他形式的能量转化为自身动能的新型智能仿生器件。（剩余9190字）