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

Abstract

Reduced graphene oxide (rGO) generates reactive oxygen species (ROS) under visible light in air via a singlet oxygen–superoxide anion radical pathway that readily kills Enterobacter sp.

Conductive Tough Hydrogel for Bioapplications

“…Optimization of the conductivity and the mechanical properties of the PUHC was achieved using hypophosphorous acid as the reducing agent (Figure ) . The PUHC became conductive following chemical reduction using 5% v/v hypophosphorous acid at 50 °C (Figure S4, Supporting Information).…”

Microcarbon-based facial creams activate aerial oxygen under light to reactive oxygen species damaging cell

“…ROS in biological context are formed as natural byproduct during the metabolism of oxygen and have important roles in cell signaling and homeostasis (Devasagayam et al 2004;Dickinson and Chang 2011). However, under environmental stress (e.g., UV or heat exposure), ROS levels can increase dramatically (Devasagayam et al 2004;Dutta et al 2015). This may result in significant damage to cell structures (Dickinson and Chang 2011;Maiuri et al 2007).…”

“…4 FTIR spectra of light treated part in air a P and b N1 and c G and d, e and f are isolated part with NaOH of P, N1, and G, respectively Appl Nanosci (2017) 7:607-616 611 reacts with the available moisture (water) to produce Graphene Oxide (GO). The GO has the property to fluoresce (Dutta et al 2015). Similarly, Fig.…”

“…Thus, the alleged active microcarbon present in all these facial cream generates reduced oxygen species (ROS) under exposure to visible light in the presence of air. This is because these are contaminated with rGO which has the property to get activated in air under light to produce GO (Dutta et al 2015) with the production of toxic superoxide radical ion (O 2 − ).…”

“…In our recent studies, we have shown that reduced graphene oxide (rGO) generates ROS (Dutta et al 2015) which can be utilized to kill hospital pathogens. ROS in biological context are formed as natural byproduct during the metabolism of oxygen and have important roles in cell signaling and homeostasis (Devasagayam et al 2004;Dickinson and Chang 2011).…”