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Highly selective optical detection of Fe3+ ions in aqueous solution using label-free silicon nanocrystals
John Wiley & Sons, Inc.
High brightness amine‐terminated silicon nanocrystals (Si NCs) have been utilized in a simple and rapid assay for the highly selective and sensitive detection of Fe3+ via quenching of their strong blue luminescence, without the need for analyte‐specific labeling groups. Sensitive detection of Fe3+ is successfully demonstrated, with a linear relationship observed between luminescence quenching and Fe3+ concentration from 5 × 10−6 to 900 × 10−6m and a limit of detection of 1.3 × 10−6m. The Si NCs show excellent selectivity toward Fe3+ ions, with no quenching of the luminescence signal induced by the presence of Fe2+ ions, allowing for solution phase discrimination between the ionic species in different charge states.
Iron , Nanocrystal , Optical detection , Sensor
Linehan, K., Carolan, D. and Doyle, H. (2019) 'Highly selective optical detection of Fe3+ ions in aqueous solution using label-free silicon nanocrystals', Particle and Particle Systems Characterization, 1900034 (8pp), doi:10.1002/ppsc.201900034
© 2019, WILEY-VCH Verlag GmbH & Co. This is the peer reviewed version of the following article: Linehan, K., Carolan, D. and Doyle, H. (2019) 'Highly selective optical detection of Fe3+ ions in aqueous solution using label-free silicon nanocrystals', Particle and Particle Systems Characterization, 1900034 (8pp), doi:10.1002/ppsc.201900034, which has been published in final form at https://doi.org/10.1002/ppsc.201900034. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.