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ortho ‐Phenylenediamine: An Effective Spacer to Build Highly Magnetic Fe 3 O 4 /Au Nanocomposites
Author(s) -
Zhao Xinmei,
Hosmane Narayan S.,
Wu Aiguo
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201200710
Subject(s) - nanocomposite , raman spectroscopy , carbonization , materials science , magnetism , nanoparticle , saturation (graph theory) , detection limit , chemical engineering , analytical chemistry (journal) , nanotechnology , nuclear chemistry , chemistry , scanning electron microscope , composite material , organic chemistry , optics , chromatography , physics , mathematics , engineering , quantum mechanics , combinatorics
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 Fe 3 O 4 microspheres. Upon carbonization with PDA, the morphology of the product changes significantly, and the resulting nanocomposites exhibit enhanced magnetism beyond the saturation value of Fe 3 O 4 . The Fe 3 O 4 /Au nanocomposites show good surface‐enhanced Raman spectroscopy activity with a detection limit of 10 −15 M .