Star-Shaped Fe_3-xO₄-Au Core-Shell Nanoparticles: From Synthesis to SERS Application.

ABSTRACT: In this work, the preparation of magneto-plasmonic granular nanostructures and their evaluation as efficient substrates for magnetically assisted surface enhanced Raman spectroscopy (SERS) sensing are discussed. These nanostructures consist of star-shaped gold Au shell grown on iron oxide Fe_3-xO₄ multicores. They were prepared by seed-mediated growth of anisotropic, in shape gold nanosatellites attached to the surface of polyol-made iron oxide polycrystals. In practice, the 180 nm-sized spherical iron oxide particles were functionalized by (3-aminopropyl) triethoxysilane (APTES) to become positively charged and to interact, in solution, with negatively charged 2 nm-sized Au single crystals, leading to nanohybrids. These hybrids acted subsequently as nucleation platfor

SUBMITTER: Nguyen TT 

PROVIDER: S-EPMC7075140 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature