Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/3226
Title: Rapid, Acid-Free Synthesis of High-Quality Graphene Quantum Dots for Aggregation Induced Sensing of Metal Ions and Bioimaging
Authors: Nair, R V
Thomas, R T
Vandana, S
Hanif, M
Dong, M
Saju Pillai
Issue Date: 16-Nov-2017
Publisher: American Chemical Society
Citation: ACS Omega, 2(11):8051-8061
Abstract: Graphene quantum dots (GQDs) are zerodimensional materials that exhibit characteristics of both graphene and quantum dots. Herein, we report a rapid, relatively green, one-pot synthesis of size-tunable GQDs from graphene oxide (GO) by a sonochemical method with intermittent microwave heating, keeping the reaction temperature constant at 90 °C. The GQDs were synthesized by oxidative cutting of GO using KMnO4 as an oxidizing agent within a short span of time (30 min) in an acid-free condition. The synthesized GQDs were of high quality and exhibited good quantum yield (23.8%), high product yield (>75%), and lower cytotoxicity (tested up to 1000 μg/mL). Furthermore, the as-synthesized GQDs were demonstrated as excellent fluorescent probes for bioimaging and label-free sensing of Fe(III) ions, with a detection limit as low as 10 × 10−6 M.
URI: http://10.10.100.66:8080/xmlui/handle/123456789/3226
Appears in Collections:2017

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