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Cited by 256

The DOI matches its Crossref record; 87 of the 87 references it cites were found in a registry or an index.

Improving the Heating Efficiency of Iron Oxide Nanoparticles by Tuning Their Shape and Size

Open access
Nemati, Zohreh, Alonso, Javier, Rodrigo, Irati, Das, Raja, Garaio, Eneko, García, José Ángel, Orue, Iñaki, Phan, Manh-Huong, Srikanth, Hariharan·2018·The Journal of Physical Chemistry C
DOI 10.1021/acs.jpcc.7b10528
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Abstract

Magnetic nanoparticle-mediated hyperthermia is a very promising therapy for cancer treatment. In this field, superparamagnetic iron oxide nanoparticles have been commonly employed because of their intrinsic biocompatibility, but they present some limitations that restrict their heating efficiency (specific absorption rate, SAR). Therefore, we have investigated how tuning the size and shape of these iron oxide nanoparticles can be useful to enhance their hyperthermia responses. Monodisperse and crystalline iron oxide nanoparticles have been synthesized by thermal decomposition in two different shapes (spheres and cubes) in a wide range of sizes, ∼10–100 nm. We have thoroughly characterized them both structurally (X-ray diffraction and transmission electron microscopy) and magnetically (physical property measurement system), and then we have analyzed their heating efficiency using a combination of calorimetric and AC magnetometry measurements (0–800 Oe, 300 kHz). We have been able to delimit a range of optimum sizes to maximize the heating efficiency of these nanoparticles depending on their shape. We find that the nanospheres exhibit the highest heating efficiency for sizes around 30–50 nm, while the nanocubes show a sharp increase in the heating efficiency around 30–35 nm. The SAR variation has been related to the magnetic anisotropy of the nanoparticles that depends on their size, shape, arrangement, and dipolar interactions.

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Metadata

Authors
Nemati, Z., Alonso, J., Rodrigo, I., Das, R., Garaio, E., García, J. Á., Orue, I., Phan, M.-H., & Srikanth, H.
Venue
The Journal of Physical Chemistry C
Publisher
American Chemical Society (ACS)
Published
2018-01-17
Volume
122
Issue
4
Pages
2367-2381
ISSN
  • 1932-7447 (ISSN-L)
  • 1932-7455
DOI
10.1021/acs.jpcc.7b10528
OpenAlex
W2781746665
Cited by
256
References
87
FWCI
11.14
Type
journal article
Language
en
Open access
green

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