Cu(II) monitoring at attomolar level assisted by rGO mediated PET

[Display omitted] •First report on Cu(II) monitoring at attomolar level, through fluorimetric route.•Cost effective and facile Cu(II) detection.•Demonstration of practical application using real water samples.•Solid state sensor strip fabrication for attomolar Cu(II) detection. Here we present a fac...

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Bibliographic Details
Published inMaterials letters Vol. 289; p. 129397
Main Authors Akhila, A.K., Suresh Babu, A.R., Renuka, N.K.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.04.2021
Elsevier BV
Subjects
Attomolar level
Carbon materials
Copper
Coumarin
Cu(II) detection
Cupric ions
Fluorescence
Graphene
Luminescence
Materials science
Monitoring
rGO
Selectivity
Water sampling
rGO
Attomolar level
Carbon materials
Luminescence
Cu(II) detection
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Summary:[Display omitted] •First report on Cu(II) monitoring at attomolar level, through fluorimetric route.•Cost effective and facile Cu(II) detection.•Demonstration of practical application using real water samples.•Solid state sensor strip fabrication for attomolar Cu(II) detection. Here we present a facile and sensitive fluorimetric method for the detection of copper at attomolar level, using 7-hydroxy-4-methyl coumarin that is non-covalently functionalised on reduced graphene oxide. The successive addition of rGO quenches the fluorescence intensity of the coumarin derivative, and the luminescence intensity is restored by the introduction of attomolar level Cu(II). The system exhibits commendable selectivity towards Cu2+ among other eighteen competing metal ions. The detection limit achieved for cupric ions is 3.90 aM. Real water sample analysis conducted shows the practical utility of the system. A filter paper based solid state sensor is also fabricated for monitoring Cu(II) at attomolar level.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.129397