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TX-100 capped iron oxide nanoparticle transformation and implications for induction heating and hyperthermia treatment

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Abstract

The use of superparamagnetic iron oxide nanoparticles (SPIONs) has gained increasing attention in the scientific community with experimental success recorded in medical science through magnetic hyperthermia in cancer treatment and targeted drug delivery. Determining how the nanoparticles and their capping agents react with their surroundings is imperative to optimizing treatments as well as researching new applications for inductively heated nanoparticles. Suspensions of iron oxide nanoparticles capped with TX-100 were prepared in both deionized (DI) water and saline solutions to create a comparison study. The samples were heated via induction, followed by TEM characterization and diffraction pattern analysis for the particles removed after exposure to the high-frequency oscillating magnetic fields. Additional characterization was performed with dynamic light scattering (DLS), magnetic force microscopy (MFM), and X-ray photoelectron spectroscopy (XPS), for determining subsequent changes in their colloidal properties, magnetic interaction, and composition. The introduction of a saline environment promoted clustering, of which its appearance was unique from the DI suspension. This clustering accompanied an increased specific absorption rate for the suspension; moreover, smaller nanoparticles were also observed around the exterior of the clusters. The change in the agglomeration of the nanoparticles within the saline suspensions, and knowledge of previous research into the behavior of TX-100 in the presence of electrolytes, suggests that the addition of sodium chloride salt brought about a chemical change within the samples. MFM measurements show that the particle clusters within the saline suspensions possess higher magnetic attractive forces, and when coupled with the calorimetric measurements gathered, it can be concluded that this positively affected the nanoparticles’ heat output. Such implications and conclusions found will prove useful in optimizing nanoparticle heating for applications such as magnetic hyperthermia.

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Acknowledgements

We would like to thank Dr. Subrata Kundu of the Central Electrochemical Research Institute in Karaikudi, India, who donated all iron oxide nanoparticles used during this research. Another huge thanks goes to the faculty at the Arkansas Nano & Bio Materials Characterization Facility, specifically Dr. Mourad Benamara and Dr. Betty Martin, for assisting our team in gathering TEM, SAED, and XPS data. All data gathered from the XRD spectrometer was under the supervision of Dr. Jingyi Chen in the Chemistry Department at the University of Arkansas to whom we would also like to extend our thanks.

All DLS measurements were gathered with the assistance of Dr. Radwan Al Faouri and Jess Ray, and we would like to extend our thanks for your help. Thanks goes to Park AFM for assisting the group with taking magnetic and topographical AFM measurements. Ambrell Induction Heating Solutions performed all induction heating processes and data collection at their facility in Scottsville, NY. Our team is grateful for the assistance of their team in the Applications Lab.

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Authors and Affiliations

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Contributions

All authors have approved the final article. Mr. Hayden Carlton and Dr. David Huitink prepared the samples for the array of testing, as well as interpreted and analyzed the TEM, SAED, XPS, and XRD data. Dr. Song Xu and Dr. Mina Hong performed AFM scans on the samples, illustrated the data through topographical plots, and provided detailed analysis. Mr. Ilmar Begishev developed the experimental methodology for heating the nanoparticle samples via induction.

Corresponding author

Correspondence to David Huitink.

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The authors declare that they have no conflict of interest.

Electronic supplementary material

ESM 1.

Table outlining sample descriptions (PNG 11.8 MB)

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ESM 2.

XRD pattern for Samples 1 and 6 (PNG 1.03 MB)

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ESM 3.

O1s spectra for Sample 21 (PNG 445 KB)

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ESM 4.

O1s spectra for Sample 22 (PNG 432 KB)

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ESM 5.

Fe 2p spectra for Sample 21 (PNG 300 KB)

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ESM 6.

Fe2p spectra for Sample 22 (PNG 461 KB)

High Resolution image (TIF 32327 kb)

Glossary

DLS

Dynamic light scattering

AFM

Atomic force microscopy

eV

Electron volt

FEM

Finite element method

MFM

Magnetic force microscopy

MRI

Magnetic resonance imaging

SAED

Selected area electron diffraction

SAR

Specific absorption rate

SPION

Superparamagnetic iron oxide nanoparticle

TEM

Transmission electron microscope

XPS

X-ray photoelectron spectroscopy

XRD

X-ray diffraction

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Carlton, H., Xu, S., Hong, M. et al. TX-100 capped iron oxide nanoparticle transformation and implications for induction heating and hyperthermia treatment. J Nanopart Res 20, 225 (2018). https://doi.org/10.1007/s11051-018-4326-z

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  • DOI: https://doi.org/10.1007/s11051-018-4326-z

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