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Charge effect of superparamagnetic iron oxide nanoparticles on their surface functionalization by photo-initiated chemical vapour deposition

Taraneh Javanbakht, Sophie Laurent, Dimitri Stanicki, Wendell Raphael and Jason Robert Tavares

Article (2015)

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Cite this document: Javanbakht, T., Laurent, S., Stanicki, D., Raphael, W. & Tavares, J. R. (2015). Charge effect of superparamagnetic iron oxide nanoparticles on their surface functionalization by photo-initiated chemical vapour deposition. Journal of Nanoparticle Research, 17(12). doi:10.1007/s11051-015-3276-y
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Abstract

Diverse applications of superparamagnetic iron oxide nanoparticles (SPIONs) in the chemical and biomedical industry depend on their surface properties. In this paper, we investigate the effect of initial surface charge (bare, positively and negatively charged SPIONs) on the resulting physicochemical properties of the particles following treatment through photo-initiated chemical vapour deposition (PICVD). Transmission electron microscopy shows a nanometric polymer coating on the SPIONs and contact angle measurements with water demonstrate that their surface became non-polar following functionalization using PICVD. FTIR and XPS data confirm the change in the chemical composition of the treated SPIONs. Indeed, XPS data reveal an initial charge-dependent increase in the surface oxygen content in the case of treated SPIONs. The O/C percentage ratios of the bare SPIONs increase from 1.7 to 1.9 after PICVD treatment, and decrease from 1.7 to 0.7 in the case of negatively charged SPIONs. The ratio remains unchanged for positively charged SPIONs (1.7). This indicates that bare and negatively charged SPIONs showed opposite preference for the oxygen or carbon attachment to their surface during their surface treatment. These results reveal that both the surface charge and stereochemical effects have determinant roles in the polymeric coating of SPIONs with PICVD. Our findings suggest that this technique is appropriate for the treatment of nanoparticles.

Uncontrolled Keywords

Superparamagnetic iron oxide nanoparticles, PICVD, Contact angle, FTIR, TEM, XPS

Open Access document in PolyPublie
Subjects: 1800 Génie chimique > 1800 Génie chimique
2000 Science et technologie des matériaux > 2004 Polymères et revêtements
Department: Département de génie chimique
Research Center: Non applicable
Funders: CRSNG/NSERC
Grant number: RGPIN 418847-2013
Date Deposited: 03 Oct 2017 14:43
Last Modified: 24 Oct 2018 16:12
PolyPublie URL: https://publications.polymtl.ca/2783/
Document issued by the official publisher
Journal Title: Journal of Nanoparticle Research (vol. 17, no. 12)
Publisher: Springer
Official URL: https://doi.org/10.1007/s11051-015-3276-y

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