https://scholars.lib.ntu.edu.tw/handle/123456789/575758
標題: | Polymer/glutathione Au nanoclusters for detection of sulfides | 作者: | Lin Y.-S Chuang L.-W Wu B.-Y Lin Y.-H Chang H.-T. HUAN-TSUNG CHANG |
關鍵字: | Fluorescence; Gold Nanoclusters; Groundwater; Hydrogen sulfide; Nanoclusters; Polymers; Quenching; Signal to noise ratio; Sodium chloride; Sulfur compounds; Au nanoclusters; Fluorescence intensities; Glutathiones; Linear detection ranges; Low detection limit; Polystyrene sulfonate; Spring water; Sulfide ions; Gold | 公開日期: | 2021 | 卷: | 333 | 來源出版物: | Sensors and Actuators, B: Chemical | 摘要: | A glutathione (GSH)-assisted approach in the presence of a polymer has been demonstrated for the preparation of stable and fluorescent gold nanoclusters (Au NCs). GSH acts as a reducing agent, while the polymer is used as a template to stabilize the as-formed Au NCs. The optimal pH value for the preparation of polymer-templated GSH-Au NCs is 11.0. With respect to the fluorescence intensity and stability, polydiallyldimethylammonium (PDDA) is more suitable than polystyrene sulfonate (PSS) for the preparation of Au NCs. When excited at 365 nm, the as-prepared PDDA/GSH-Au NCs prepared at pH 2.0 and 11.0 emit fluorescence at the wavelengths of 620 and 690 nm, respectively, which are assigned separately to GSH-Au and PDDA/GSH-Au NCs. Through the formation of Au2S, hydrogen sulfide induces fluorescence quenching of the PDDA/GSH-Au NCs. The PDDA/GSH-Au NCs show sensitivity and selectivity for the quantitation of sulfide ions, with a linear detection range of 1–10 μM and a low detection limit (signal-to-noise ratio = 3) of 0.32 μM. The low-cost PDDA/GSH-Au NCs are stable against NaCl up to a concentration of 500 mM, and have been applied to the quantitation of sulfide ions in spring water samples with good accuracy and recovery. ? 2020 |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101277237&doi=10.1016%2fj.snb.2020.129356&partnerID=40&md5=c7947265a90afe229f5029a65a256e1a https://scholars.lib.ntu.edu.tw/handle/123456789/575758 |
ISSN: | 9254005 | DOI: | 10.1016/j.snb.2020.129356 |
顯示於: | 化學系 |
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