MXene-Based\nMicromotors: Active Molecular Enrichment\nand Selective Raman Enhancement

This Letter introduces MXene-based rod-like micromotors,\nconsisting\nof assembled Fe<sub>3</sub>O<sub>4</sub>@Ti<sub>2</sub>C core–shell\nnanospheres, that leverage external magnetic fields for active molecular\nenrichment and selective surface-enhanced Raman scattering (SERS)\nsensing. These micromotors enhance SERS performance by concentrating\ntarget molecules directly onto MXene surfaces during movement, enabling\nrapid and precise detection. Our investigation reveals how these micromotors\noptimize SERS through effective molecular manipulation and explores\nthe selective Raman enhancement facilitated by the MXene-based platforms,\ndemonstrating their significant potential in analytical applications.