Skip to Main content Skip to Navigation
Journal articles

Multifunctional hybrid silica nanoparticles based on [Mo₆Br₁₄]²⁻ phosphorescent nanosized clusters, magnetic γ-Fe₂O₃ and plasmonic gold nanoparticles

Abstract : We report on the synthesis, characterization and photophysical study of new luminescent and magnetic hybrid silica nanoparticles. Our method is based on the co-encapsulation of single maghemite γ-Fe2O3 nanoparticles and luminescent molybdenum cluster units [Mo6Br(i)8Br(a)6](2-) through a water-in-oil (W/O) microemulsion technique. The as-prepared core-shell [Cs2Mo6Br14-γFe2O3]@SiO2 nanoparticles (45-53 nm) possess a single magnetic core (6, 10.5 or 15 nm) and the cluster units are dispersed in the entire volume of the silica sphere. The [Cs2Mo6Br14-γFe2O3]@SiO2 nanoparticles have a perfect spherical shape with a good monodispersity and they display red and near-infrared (NIR) emission in water under UV excitation, whose intensity depends on the magnetic core size. The hybrid nanoparticles have been characterized by transmission electron microscopy (TEM), high annular angular dark field scanning transmission electron microscopy (HAADF-STEM), energy-dispersive X-ray spectroscopy (EDX), UV-Vis-NIR spectroscopy and magnetometer SQUID analysis. Small gold nanoparticles were successfully nucleated at the surface of the hybrid silica nanoparticles in order to add plasmonic properties.
Document type :
Journal articles
Complete list of metadatas

Cited literature [2 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01020577
Contributor : Muriel Cadieu <>
Submitted on : Tuesday, July 8, 2014 - 11:48:11 AM
Last modification on : Wednesday, October 14, 2020 - 4:04:42 AM
Long-term archiving on: : Wednesday, October 8, 2014 - 1:05:10 PM

File

Multifunctional_hybrid_silica_...
Files produced by the author(s)

Identifiers

Citation

Nicolas Nerambourg, Tangi Aubert, Chrystelle Neaime, Stéphane Cordier, Michel Mortier, et al.. Multifunctional hybrid silica nanoparticles based on [Mo₆Br₁₄]²⁻ phosphorescent nanosized clusters, magnetic γ-Fe₂O₃ and plasmonic gold nanoparticles. Journal of Colloid and Interface Science, Elsevier, 2014, 424, pp.132-40. ⟨10.1016/j.jcis.2014.03.008⟩. ⟨hal-01020577⟩

Share

Metrics

Record views

606

Files downloads

263