Magnetic field-induced plasmonic enhancement of near infrared fluorescence from a Magnetoplasmonic nanoplatform for bioimaging applications.

ABSTRACT: A phenomenon of plasmon-enhanced fluorescence (PEF) arises from interactions between fluorophores and metal nanostructures, leading to a substantial amplification of the fluorescence signal. Herein, we report a magnetic field (MF) induced on-demand PEF from the magnetoplasmonic nanoplatform and demonstrate its application in near infrared (NIR) bioimaging. The developed magnetoplasmonic nanoparticles (~ 50 nm diameter) feature a core-shell-satellite architecture comprising a Fe₃O₄ magnetic core, a mesoporous silica (mSiO₂) shell housing IR775-silane NIR dye, and surface-anchored gold (Au) seeds (satellites). Application of an external MF causes the magnetophoretic movement and aggregation of the nanoparticles (NPs), resulting in a formation of localized pla

SUBMITTER: Gao S 

PROVIDER: S-EPMC12482384 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature