| Literature DB >> 21559088 |
José M Vargas, Amber A McBride, John B Plumley, Yann Fichou, Tosifa A Memon, Vichiksha Shah, Nathaniel C Cook, Brian A Akins, Antonio C Rivera, Gennady A Smolyakov, James R O'Brien, Natalie L Adolphi, Hugh D C Smyth, Marek Osiński.
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.Entities:
Year: 2011 PMID： 21559088 PMCID： PMC3089650 DOI： 10.1063/1.3565190
Source DB: PubMed Journal: J Appl Phys ISSN： 0021-8979 Impact factor: 2.546