A review on graphene-based nanocomposites for electrochemical and fluorescent biosensors

Abstract

Biosensors with high sensitivity, selectivity and a low limit of detection, reaching nano/picomolar concentrations of biomolecules, are important to the medical sciences and healthcare industry for evaluating physiological and metabolic parameters.

Experimental and computational studies of graphene oxide covalently functionalized by octylamine: electrochemical stability, hydrogen evolution, and corrosion inhibition of the AZ13 Mg alloy in 3.5% NaCl

“…The oxidation peak appeared from 0.2 mV to 0.7 mV due to the alkyl chain electron continued exchange with the GO matrix. 37,38 Next, at the applied voltage of 500 mV, the redox behavior was increased from 0.3 mV to 0.5 mV due to the presence of the graphene oxide carbonyl delocalized electrons. Hence, the GO graphitic carbon non-bonding electrons pushed electrons to the alkyl chain.…”

Graphenic Materials for Biomedical Applications

“…Biosensors based on GBMs are adaptable diagnostic tools that possess faster detection than traditional methods. They can detect femto-or pico-molar concentrations of measured substances [87]. A chemical sensor is an instrument which is able to quantitatively/semi-quantitatively convert the detection of a chemical into an evaluable signal [9].…”

“…Thus, biosensors are of paramount importance biosensors due to their properties. Research on a highly sensitive biosensor can provide new materials, which is useful for the very sensitive determination of various biomarkers and compounds in various areas of life science, such as biomedical, food, agricultural, and environmental applications, along with equally important applications in industry [87].…”

Reduced Graphene Oxide–Epoxy Grafted Poly(Styrene-Co-Acrylate) Composites for Corrosion Protection of Mild Steel

“…Graphene (G) and its family materials including graphene oxide (GO) and reduced graphene oxide (rGO) have been used widely for metal corrosion protection [1][2][3][4], which is beneficial due to its excellent physical barrier, chemical and electrochemical properties. However, because of strong van der Waals forces and high specific ratio, G, GO or rGO tend to easily aggregate each other, which greatly limits their functional development and industrial applications [5][6][7].…”