Highly Selective Optical Detection of Fe3+Ions in Aqueous Solution Using Label‐Free Silicon Nanocrystals

Autor:	Hugh Doyle, Keith Linehan, Darragh Carolan
Rok vydání:	2019
Předmět:	Aqueous solution Materials science Iron Optical detection Nanocrystal General Chemistry Condensed Matter Physics Highly selective Photochemistry Ion General Materials Science Silicon nanocrystals Sensor Label free
Zdroj:	Particle & Particle Systems Characterization. 36:1900034
ISSN:	1521-4117 0934-0866
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a55742916ac0e7217b22d56fab23705d https://doi.org/10.1002/ppsc.201900034 Zobrazit plný text záznamu Plný text