Large Scale Synthesis of Graphene Quantum Dots (GQDs) from Waste Biomass and Their Use As an Efficient and Selective Photoluminescence On-off-on Probe for Ag(+) Ions

Overview

Journal Nanoscale

Specialty Biotechnology

Date 2014 Aug 28

PMID 25162814

Citations 36

Authors

Anil Suryawanshi

Mandakini Biswal

Dattakumar Mhamane

Rohan Gokhale

Shankar Patil

Debanjan Guin

Satishchandra Ogale

Affiliations

Soon will be listed here.

Abstract

Graphene quantum dots (GQDs) are synthesized from bio-waste and are further modified to produce amine-terminated GQDs (Am-GQDs) which have higher dispersibility and photoluminescence intensity than those of GQDs. A strong fluorescence quenching of Am-GQDs (switch-off) is observed for a number of metal ions, but only for the Ag(+) ions is the original fluorescence regenerated (switch-on) upon addition of L-cysteine.

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