Construction of novel nonenzymatic Xanthine biosensor based on reduced graphene oxide/polypyrrole/CdO nanocomposite for fish meat freshness detection

Pristine graphene covalent functionalization with aromatic aziridines and their application in the sensing of volatile amines – an ab initio investigation

“…The addition of as low as 1.3 ppm of DMPP induces a variation of the chemoresistance by 10%. 6 Fish freshness can be assessed using a series of biomarkers [29][30][31][32][33] such as xanthine employing biosensors, [30][31][32][33][34][35][36][37][38][39] but also by detecting total volatile basic amines (TVB) such as ammonia, methylamine, dimethylamine and trimethylamine, that result from bacterial spoilage, enzymatic lysis and deamination of seafood. 40 Developing graphene-based sensors with chemical functionalities represents a promising path in this direction since functionalized graphene can lead to a favourable interaction with specic VOCs thanks to the matching chemical characteristics that may result in highly sensitive and specic sensors.…”

A novel electrochemical sensor for determination of uric acid in the presence of ascorbic acid and dopamine based on a carbon paste electrode modified with an electrochemically reduced para-nitrobenzoic acid/graphene oxide nanocomposite

“…It has recently been shown that the choice of electrode materials in terms of electrode geometry, chemical composition, and surface structure has a significant effect on the observed electrochemical properties. 18,19…”

“…It has recently been shown that the choice of electrode materials in terms of electrode geometry, chemical composition, and surface structure has a significant effect on the observed electrochemical properties. 18,19 Graphene facilitates the placement of electroactive species as well as the electron transfer of these species at the electrode surface due to its optimum electron mobility and its unique surface properties, such as a high specific surface area and oneatom thickness. Furthermore, due to the high surface area of graphene, there are many electroactive sites on its surface, which are suitable for loading a large number of biological species on the electrode used in electrochemical sensing applications.…”