Issue 30, 2023

Ultrasmall Pt NPs-modified flasklike colloidal motors with high mobility and enhanced ion tolerance

Abstract

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 H2O2 fuels. They exhibit ultrafast mobility with an instantaneous velocity of 134 μm s−1 at 5% H2O2, 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.

Graphical abstract: Ultrasmall Pt NPs-modified flasklike colloidal motors with high mobility and enhanced ion tolerance

Supplementary files

Article information

Article type
Paper
Submitted
06 juin 2023
Accepted
05 juil. 2023
First published
05 juil. 2023

Nanoscale, 2023,15, 12558-12566

Ultrasmall Pt NPs-modified flasklike colloidal motors with high mobility and enhanced ion tolerance

S. Yuan, L. Yang, X. Lin and Q. He, Nanoscale, 2023, 15, 12558 DOI: 10.1039/D3NR02664G

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