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Issue 113, 2016, Issue in Progress
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Surface modification of promising cerium oxide nanoparticles for nanomedicine applications

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Abstract

Cerium oxide nanoparticles (CNPs) or nanoceria have emerged as a potential nanomedicine for the treatment of several diseases such as cancer. CNPs have a natural tendency to aggregate or agglomerate in their bare state, which leads to sedimentation in a biological environment. Since the natural biological environment is essentially aqueous, nanoparticle surface modification using suitable biocompatible hydrophilic chemical moieties is highly desirable to create effective aqueous dispersions. In this report, (6-{2-[2-(2-methoxy-ethoxy)-ethoxy]-ethoxy}-hexyl)triethoxysilane was used as a functional, biocompatible organosilane to modify the surface of CNPs to produce promising nanoparticles which open substantial therapeutic avenues. The surface modified nanoparticles were produced in situ via an ammonia-induced ethylene glycol-assisted precipitation method and were characterized using complimentary characterization techniques. The interaction between the functional moiety and the nanoparticle was studied using powerful cross polarization/magic angle sample spinning solid state nuclear magnetic resonance spectroscopy. The surface-modified nanoparticles were extremely small and demonstrated a significant improvement in aqueous dispersibility. Moreover, the existence of a strong ionic coordination between the functional moiety and the surface of the nanoparticle was realised, indicating that the surface modified nanoceria are stable and that the nanoparticles should demonstrate an enhanced circulation time in a biological environment. The surface modification approach should be promising for the production of CNPs for nanomedicine applications.

Graphical abstract: Surface modification of promising cerium oxide nanoparticles for nanomedicine applications

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Article information


Submitted
15 Sep 2016
Accepted
14 Nov 2016
First published
14 Nov 2016

RSC Adv., 2016,6, 111889-111894
Article type
Communication

Surface modification of promising cerium oxide nanoparticles for nanomedicine applications

H. S. Nanda, RSC Adv., 2016, 6, 111889
DOI: 10.1039/C6RA23046F

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