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Gold/Iron Oxide Core/Hollow‐Shell Nanoparticles
Author(s) -
Shevchenko Elena V.,
Bodnarchuk Maryna I.,
Kovalenko Maksym V.,
Talapin Dmitri V.,
Smith Rachel K.,
Aloni Shaul,
Heiss Wolfgang,
Alivisatos A. Paul
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200702994
Subject(s) - materials science , nanoparticle , surface plasmon resonance , oxide , nanotechnology , shell (structure) , iron oxide , superparamagnetism , plasmon , optoelectronics , metallurgy , composite material , physics , magnetization , quantum mechanics , magnetic field
Gold/iron oxide core/hollow‐shell composite nanoparticles (NPs) with controllable shell thicknesses are synthesized (see figure). The gap between the Au core and iron oxide shell is formed as a result of different outward and inward diffusion rates of Fe and O, respectively. Control over interparticle interactions allows encapsulation of several Au cores inside one iron oxide shell. Superparamagnetic measurements of the NPs at room temperature demonstrate the plasmon resonance at 565 nm.