title: Synthesis and characterization of core∕shell Fe(3)O(4)∕ZnSe fluorescent magnetic nanoparticles.
abstract: We report on the successful preparation and characterization of fluorescent magnetic core∕shell Fe(3)O(4)∕ZnSe nanoparticles (NPs) with a spherical shape by organometallic synthesis. The 7 nm core∕3 nm shell NPs show good magnetic and photoluminescence (PL) responses. The observed PL emission∕excitation spectra are shifted to shorter wavelengths, compared to a reference ZnSe NP sample. A dramatic reduction of PL quantum yield is also observed. The temperature dependence of the magnetization for the core∕shell NPs shows the characteristic features of two coexisting and interacting magnetic (Fe(3)O(4)) and nonmagnetic (ZnSe) phases. Compared to a reference Fe(3)O(4) NP sample, the room-temperature Néel relaxation time in core∕shell NPs is three times longer.
authors.forename: José M
authors.initials: JM
authors.lastname: Vargas
authors.forename: Amber A
authors.initials: AA
authors.lastname: McBride
authors.forename: John B
authors.initials: JB
authors.lastname: Plumley
authors.forename: Yann
authors.initials: Y
authors.lastname: Fichou
authors.forename: Tosifa A
authors.initials: TA
authors.lastname: Memon
authors.forename: Vichiksha
authors.initials: V
authors.lastname: Shah
authors.forename: Nathaniel C
authors.initials: NC
authors.lastname: Cook
authors.forename: Brian A
authors.initials: BA
authors.lastname: Akins
authors.forename: Antonio C
authors.initials: AC
authors.lastname: Rivera
authors.forename: Gennady A
authors.initials: GA
authors.lastname: Smolyakov
authors.forename: James R
authors.initials: JR
authors.lastname: O'Brien
authors.forename: Natalie L
authors.initials: NL
authors.lastname: Adolphi
authors.forename: Hugh D C
authors.initials: HD
authors.lastname: Smyth
authors.forename: Marek
authors.initials: M
authors.lastname: Osiński