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Green synthesis of Eosin-Y coated silver nanoparticles for sensitive and selective fluorometric detection of L-Dopa

This study is to produce biogenic silver nanoparticles (AgNPs) by utilizing aqueous extracts derived from Turnera Sublata (TS) leaves under visible light. Subsequently, these nanoparticles are coated with eosin-yellow (EY) to enhance sensitivity and selectivity in L-3,4-dihydroxyphenylalanine (L-dop...

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Main Authors: Nagaraj, Karuppiah (Author) , Thangamuniyandi, P. (Author) , Velmurugan, Gunasekaran (Author) , Alotaibi, Khalid M. (Author) , Raja, K. (Author) , Sharma, Bhuwanesh K. (Author)
Format: Article (Journal)
Language:English
Published: 15 January 2025
In: Journal of fluorescence
Year: 2025, Pages: 1-12
ISSN:1573-4994
DOI:10.1007/s10895-024-04116-7
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/s10895-024-04116-7
Verlag, lizenzpflichtig, Volltext: https://link.springer.com/article/10.1007/s10895-024-04116-7
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Author Notes:Karuppiah Nagaraj, P. Thangamuniyandi, Gunasekaran Velmurugan, Khalid M. Alotaibi, K. Raja, Bhuwanesh K. Sharma
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Summary:This study is to produce biogenic silver nanoparticles (AgNPs) by utilizing aqueous extracts derived from Turnera Sublata (TS) leaves under visible light. Subsequently, these nanoparticles are coated with eosin-yellow (EY) to enhance sensitivity and selectivity in L-3,4-dihydroxyphenylalanine (L-dopa) detection. This method encompasses the deposition of metal onto the Ag NPs, resulting in the formation of EY-AgNPs. The crystalline, spherical nanoparticles, prepared as described, exhibit a particle size of 20 nm. Different instruments were used to characterize them, including UV-Vis spectroscopy, fluorescence spectroscopy, FTIR spectroscopy, selected area electron diffraction (SAED), transmission electron microscopy (TEM), and X-ray diffraction (XRD) analysis. The spherical structured morphology and size of the EY-AgNPs has been confirmed through SAED and TEM studies. This study pioneered the integration of characteristic hydroxyl-Ag chemistry and specialized steric interference of organic pigment in luminescent AgNPs to develop a simple method for detecting dopa. The sensor’s dynamic range and limit of detection were assessed. Experimental results revealed that green-emitting AgNPs shielded by interference from biogenic AgNPs and the strong affinity of hydroxyl-silver provided a high-sensitivity detection limit of 1.84 nM. Furthermore, a new green approach for sensor development using human serum albumin (HSA) assay demonstrated that organic dye on the surface of nanomaterials further enhances sensing properties.
Item Description:Gesehen am 19.09.2025
Physical Description:Online Resource
ISSN:1573-4994
DOI:10.1007/s10895-024-04116-7

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