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Antioxidant Properties of ALD Grown Nanoceria Films with Tunable Valency

Abstract

Herein, we provide the first account of a method to control cerium oxide’s mixed valence states (as Ce3+ to Ce4+ ratio) in ultra-thin films formed via atomic layer deposition (ALD). It is determined that the modulation of Ce3+/Ce4+ ratio occurs with respect to film thickness and is analogous to the change in surface chemistry observed for cerium oxide nanoparticles with varying particle diameter. The influence of film thickness on enzyme-mimetic radical scavenging is also characterized. Higher film thicknesses show a 9-fold increase in catalytic activity. In vitro biocompatibility (apoptosis <4%) and electrochemical biosensing (lowest concentration: 18 ppt) studies were performed to demonstrate the potential of ALD-grown nanoceria films for biomedical applications.

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Supplementary files

Publication details

The article was received on 13 Mar 2019, accepted on 07 May 2019 and first published on 09 May 2019


Article type: Paper
DOI: 10.1039/C9BM00397E
Biomater. Sci., 2019, Accepted Manuscript

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    Antioxidant Properties of ALD Grown Nanoceria Films with Tunable Valency

    A. Gupta, T. Selvan, C. J. Neal, S. Koul, S. Singh, A. Kushima and S. Seal, Biomater. Sci., 2019, Accepted Manuscript , DOI: 10.1039/C9BM00397E

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