Magnetic Nanoparticles Embedded on Graphene Quantum dots: A New Platform towards Screening the Effect of Electroactive Amino Acids on Electrochemical Signals of Each other at Physiological pH

As a laboratory technique, the analysis of amino acid plays an important role in biochemical, pharmaceutical and biomedical fields. There is, therefore, a need for the rapid and accurate analysis of amino acid. In this report, the Fe3O4 magnetic nanoparticles/graphene quantum dots (Fe3O4 MNP-GQDs) was used for the investigation of electroactive amino acids effect on the electrochemical signals of each other. This sensor used towards probing the interaction study of electroactive amino acids with each other at physiological pH (pH=7.4) by differential pulse voltammetry. The herein described approach is expected to promote the exploitation of electrochemically-based methods for the study of amino acids-amino acid interaction which is necessary in biochemical and biosensing studies. This report may open a new window to direct peptide analysis in the future.