title: ortho-Phenylenediamine: an effective spacer to build highly magnetic Fe3O4/Au nanocomposites.
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 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.
authors.affiliation: Key Laboratory of Magnetic Materials and Devices & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
authors.forename: Xinmei
authors.initials: X
authors.lastname: Zhao
authors.forename: Narayan S
authors.initials: NS
authors.lastname: Hosmane
authors.forename: Aiguo
authors.initials: A
authors.lastname: Wu
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008280:Magnetics / Q000379:methods; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008863:Microspheres; D053761:Nanocomposites / Q000737:chemistry*; D010655:Phenylenediamines / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D058185:Magnetite Nanoparticles; D010655:Phenylenediamines; C000499:ferric oxide; D006046:Gold; C034193:1,2-diaminobenzene