Yuan Shurui, Yang Ling, Lin Xiankun, He Qiang
School of Medicine and Health, Harbin Institute of Technology, Yi Kuang Jie 2, Harbin 150080, China.
Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325000, China.
Nanoscale. 2023 Aug 3;15(30):12558-12566. doi: 10.1039/d3nr02664g.
Chemically powered colloidal motors propelled by the self-phoretic effect have attracted widespread attention. However, the low motion efficiency and ion tolerance hinder their application in complex media. Herein, we report a scalable and simple method to synthesize 2.6 nm Platinum nanoparticles (Pt NPs) in the nanoporous wall of carbonaceous flasklike colloidal motors in a ligand-free manner. The obtained Pt NPs-modified flasklike colloidal motors (Pt-FCMs) are propelled by the catalytic decomposition of HO fuels. They exhibit ultrafast mobility with an instantaneous velocity of 134 μm s at 5% HO, which is equivalent to 180 bodylengths per second. Particularly, these Pt-FCMs have an enhanced ion tolerance, due to the higher catalytic activity of small-sized Pt NPs in the carbonaceous wall. Furthermore, the direction of motion could be reversed by adding cationic surfactant cetyltrimethylammonium bromide. Such ultrasmall Pt NPs funtionalized flasklike colloidal motors exhibit a great potential utilization in the field of biomedicines and environmental technology.
由自泳效应驱动的化学动力胶体马达已引起广泛关注。然而，低运动效率和离子耐受性阻碍了它们在复杂介质中的应用。在此，我们报告了一种可扩展且简单的方法，以无配体方式在碳质烧瓶状胶体马达的纳米孔壁中合成2.6纳米的铂纳米颗粒（Pt NPs）。所获得的Pt NPs修饰的烧瓶状胶体马达（Pt-FCMs）由HO燃料的催化分解驱动。它们在5% HO时表现出超快迁移率，瞬时速度为134μm/s，相当于每秒180个体长。特别地，由于碳质壁中小尺寸Pt NPs的较高催化活性，这些Pt-FCMs具有增强的离子耐受性。此外，通过添加阳离子表面活性剂十六烷基三甲基溴化铵可以反转运动方向。这种超小Pt NPs功能化的烧瓶状胶体马达在生物医学和环境技术领域展现出巨大的潜在应用价值。
