Semi-quantitative and visual assay of copper ions by fluorescent test paper constructed with dual-emission carbon dots. Issue 23 (3rd April 2018)

• Record Type: Journal Article
• Authors: Wang, Yifan; Wu, Mian; Yu, Shaoming; Jiang, Changlong
• Is Part Of: RSC advances. Volume 8:Issue 23(2018)
• Page Start: 12708
• Page End: 12713
• Publication Date: 2018-04-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra00917a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A ratiometric fluorescence nanosensor has been developed by mixing blue fluorescent carbon dots and orange fluorescent carbon dots for the detection of copper ions. Abstract : A novel, simple and effective dual-emissive fluorescent probe for the sensitive and selective detection of Cu(ii ) has been developed by mixing blue carbon dots and orange carbon dots, with a sensitive detection limit of 7.31 nM. The blue fluorescence can be selectively quenched by Cu(ii ), while the orange fluorescence is a internal reference, resulting in a distinguishable fluorescence color change from blue to orange under a UV lamp. Meanwhile, its as-prepared text paper provides a convenient and simple approach for the visual detection of Cu(ii ) and successfully applied in real water samples, with a dose-discerning ability as low as 50 nM. The methodology reported here opens a novel pathway toward the real applications of fluorescent test papers.