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@ARTICLE{Shams:885810,
author = {Shams, S. Fatemeh and Ghazanfari, Mohammad Reza and
Pettinger, Susanne and Tavabi, Amir H. and Siemensmeyer,
Konrad and Smekhova, Alevtina and Dunin-Borkowski, Rafal E.
and Westmeyer, Gil G. and Schmitz-Antoniak, Carolin},
title = {{S}tructural perspective on revealing heat dissipation
behavior of {C}o{F}e 2 {O} 4 –{P}d nanohybrids: great
promise for magnetic fluid hyperthermia},
journal = {Physical chemistry, chemical physics},
volume = {22},
number = {46},
issn = {1463-9084},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2020-04101},
pages = {26728-26741},
year = {2020},
abstract = {Loss mechanisms in fluid heating of cobalt ferrite (CFO)
nanoparticles and CFO–Pd heterodimer colloidal suspensions
are investigated as a function of particle size, fluid
concentration and magnetic field amplitude. The specific
absorption rate (SAR) is found to vary with increasing
particle size due to a change in dominant heating mechanism
from susceptibility to hysteresis and frictional loss. The
maximum SAR is obtained for particle diameters of 11–15 nm
as a result of synergistic contributions of susceptibility
loss, including Néel and Brownian relaxation and especially
hysteresis loss, thereby validating the applicability of
linear response theory to superparamagnetic CFO
nanoparticles. Our results show that the ferrofluid
concentration and magnetic field amplitude alter
interparticle interactions and associated heating
efficiency. The SAR of the CFO nanoparticles could be
maximized by adjusting the synthesis parameters. Despite the
paramagnetic properties of individual palladium
nanoparticles, CFO–Pd heterodimer suspensions were
observed to have surprisingly improved magnetization as well
as SAR values, when compared with CFO ferrofluids. This
difference is attributed to interfacial interactions between
the magnetic moments of paramagnetic Pd and
superparamagnetic/ferrimagnetic CFO. SAR values measured
from CFO–Pd heterodimer suspensions were found to be
47–52 W gFerrite−1, which is up to a factor of two
higher than the SAR values of commercially available
ferrofluids, demonstrating their potential as efficient heat
mediators. Our results provide insight into the utilization
of CFO–Pd heterodimer suspensions as potential
nanoplatforms for diagnostic and therapeutic biomedical
applications, e.g., in cancer hyperthermia, cryopreserved
tissue warming, thermoablative therapy, drug delivery and
bioimaging.},
cin = {ER-C-1 / PGI-6},
ddc = {540},
cid = {I:(DE-Juel1)ER-C-1-20170209 / I:(DE-Juel1)PGI-6-20110106},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)
/ ESTEEM3 - Enabling Science and Technology through European
Electron Microscopy (823717)},
pid = {G:(DE-HGF)POF3-143 / G:(EU-Grant)823717},
typ = {PUB:(DE-HGF)16},
pubmed = {33078790},
UT = {WOS:000597256600078},
doi = {10.1039/D0CP02076A},
url = {https://juser.fz-juelich.de/record/885810},
}