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Keywords:

  • iron;
  • gold;
  • magnetic properties;
  • nanostructures;
  • Raman spectroscopy

Abstract

1,2-Diaminobenzene, popularly known as ortho-phenylenediamine (PDA), is found to be a prototype spacer for the deposition of gold nanoparticles on the surfaces of Fe3O4 microspheres. Upon carbonization with PDA, the morphology of the product changes significantly, and the resulting nanocomposites exhibit enhanced magnetism beyond the saturation value of Fe3O4. The Fe3O4/Au nanocomposites show good surface-enhanced Raman spectroscopy activity with a detection limit of 10−15M.