Synthesis and evaluation of the SERS effect of Fe₃O₄-Ag Janus composite materials for separable, highly sensitive substrates.

ABSTRACT: Fe₃O₄-Ag Janus composites were synthesized using a two-step solvothermal method. The optimal growth process was determined by investigating the relationship between the particle morphologies and reaction time. Magnetic and Raman spectroscopic measurements showed that the as-synthesized Janus composites have both good magnetic response and significant surface-enhanced Raman scattering (SERS) effects, as well as reproducibility. The calculated Raman enhancement factor reached an unprecedented magnitude of 10⁹ compared with the values of other Fe₃O₄-Ag compounds. Furthermore, the SERS effect was exhibited even at a concentration of probe molecules as low as 10^-13 M. This demonstrates that the as-synthesized Fe₃O

SUBMITTER: Li Y 

PROVIDER: S-EPMC9059953 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature