Recent advances in graphene quantum dot-based optical and electrochemical (bio)analytical sensors

The emergence of nanostructured materials has generated enormous research interest for biomedical, printing, and optoelectronic applications in view of their interesting optical, electronic, and physicochemical properties. Over the past decade, these materials have been broadly utilized toward the fabrication of electrochemical and optical biosensors. Among them, the newly emerging zero-dimensional derivative of graphene, widely regarded as graphene quantum dots Dr Rangadhar Pradhan obtained his MSc degree in Zoology from Utkal University, Bhubaneswar in 2003 and his MTech and PhD degrees from IIT Kharagpur in 2006 and 2013, respectively

Ashish Kalkal; Sachin Kadian; Rangadhar Pradhan; Gaurav Manik; Gopinath Packirisamy

2021

Scholarcy highlights

  • The emergence of nanostructured materials has generated enormous research interest for biomedical, printing, and optoelectronic applications in view of their interesting optical, electronic, and physicochemical properties. Over the past decade, these materials have been broadly utilized toward the fabrication of electrochemical and optical biosensors. Among them, the newly emerging zero-dimensional derivative of graphene, widely regarded as graphene quantum dotsDr Rangadhar Pradhan obtained his MSc degree in Zoology fromUtkal University, Bhubaneswar in 2003 and his MTech and PhD degrees from IIT Kharagpur in 2006 and 2013, respectively
  • graphene quantum dots has emerged as an indispensable material because of their outstanding properties of chemical stability, desirable aqueous solubility, an abundance of active sites, excellent biocompatibility, tunable photoluminescence, fast transduction rate, the capability of direct electron transfer, electrocatalytic activity, larger surface areas and ease of surface functionalization
  • GQDs have been surface-functionalized with a variety of biomolecules, including proteins, enzymes, and oligonucleotides, towards the fabrication of optical and electrochemical biosensing platforms
  • Further efforts have been made to enlighten the scope of GQDs in the fabrication of numerous optical and electrochemical biosensors toward the quantification of nucleic acids, bioflavonoids, amino acids, vitamins, heavy metal ions, biomarkers, and other small molecules
  • Only a few studies have discussed the mechanism of electron transfer and enhancement in the quantum yield due to heteroatom doping and surface functionalization
  • In the near future, in-depth investigations of these issues will certainly assist researchers and scientists in understanding the optoelectronic characteristics of GQDs, which will open a new window towards the development of highly efficient biosensing platforms
  • In the near future, in-depth investigations of these issues will certainly assist researchers and scientists in understanding the optoelectronic characteristics of graphene quantum dots, which will open a new window towards the development of highly efficient biosensing platforms

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