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1. ROS generation by reduced graphene oxide (rGO) induced by visible light showing antibacterial activity: comparison with graphene oxide (GO)

Author

Sabyasachi Sarkar, Ripon Sarkar, Rudra P. Sarkar, Ananya Barui, Taposhree Dutta, Bholanath Pakhira, and Subrata Ghosh

Subjects
chemistry.chemical_classification, Reactive oxygen species, Graphene, General Chemical Engineering, Inorganic chemistry, Oxide, General Chemistry, engineering.material, Photochemistry, Fluorescence, law.invention, chemistry.chemical_compound, Surface coating, Coating, chemistry, law, engineering, Singlet state, Visible spectrum
Abstract

Reduced graphene oxide (rGO) generates reactive oxygen species (ROS) under visible light in air via a singlet oxygen–superoxide anion radical pathway which readily kills Enterobacter sp. The rGO+ intermediate reacts with a hydroxyl ion to produce graphene oxide (GO) as a coating on the surface of rGO resulting in enhanced fluorescence and a slow down in photo-induced ROS formation. GO is not toxic but on ageing it gets a surface coating of rGO and shows toxicity.

Published
2015

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