10.1021/acsnano.7b00609.s001
Mythreyi Unni
Mythreyi
Unni
Amanda M. Uhl
Amanda M.
Uhl
Shehaab Savliwala
Shehaab
Savliwala
Benjamin H. Savitzky
Benjamin H.
Savitzky
Rohan Dhavalikar
Rohan
Dhavalikar
Nicolas Garraud
Nicolas
Garraud
David P Arnold
David P
Arnold
Lena F. Kourkoutis
Lena F.
Kourkoutis
Jennifer S. Andrew
Jennifer S.
Andrew
Carlos Rinaldi
Carlos
Rinaldi
Thermal
Decomposition Synthesis of Iron Oxide Nanoparticles
with Diminished Magnetic Dead Layer by Controlled Addition of Oxygen
American Chemical Society
2017
Dead Layer
decomposition synthesis
postsynthesis oxidation
crystal defects
results address
iron oxide nanoparticles
iron oxide phases
organometallic precursors
Popular synthesis methods
shape control
Oxygen Decades
Thermal Decomposition Synthesis
Iron Oxide Nanoparticles
single-crystalline iron oxide nanoparticles
Controlled Addition
reactive species
magetic diameter distributions
2017-02-08 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Thermal_Decomposition_Synthesis_of_Iron_Oxide_Nanoparticles_with_Diminished_Magnetic_Dead_Layer_by_Controlled_Addition_of_Oxygen/4649950
Decades
of research focused on size and shape control of iron oxide
nanoparticles have led to methods of synthesis that afford excellent
control over physical size and shape but comparatively poor control
over magnetic properties. Popular synthesis methods based on thermal
decomposition of organometallic precursors in the absence of oxygen
have yielded particles with mixed iron oxide phases, crystal defects,
and poorer than expected magnetic properties, including the existence
of a thick “magnetically dead layer” experimentally
evidenced by a magnetic diameter significantly smaller than the physical
diameter. Here, we show how single-crystalline iron oxide nanoparticles
with few defects and similar physical and magetic diameter distributions
can be obtained by introducing molecular oxygen as one of the reactive
species in the thermal decomposition synthesis. This is achieved without
the need for any postsynthesis oxidation or thermal annealing. These
results address a significant challenge in the synthesis of nanoparticles
with predictable magnetic properties and could lead to advances in
applications of magnetic nanoparticles.