What works and what doesn’t when graphene quantum dots are functionalized for contemporary applications?

Ravi, Pavithra V.; Subramaniyam, Vinodhini; Saravanakumar, Neha; Pattabiraman, Ajay; Pichumani, Moorthi

doi:10.1016/j.ccr.2023.215270

Cited by 10 publications

(1 citation statement)

References 254 publications

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“…According to the literature reports, graphene quantum dots (GQDs) were widely functionalized using many polymers like polyaniline, polypyrene, polyethyleneglycols (PEGs), drugs such as folic acid, dopamine and dyes such as rhodamine and methylene blue. [18][19][20][21][22][23][24] Research in this area has indicated that the presence of functional groups such as carboxylic acids and epoxides can induce non-radiative recombination centers of electron-hole pair and thereby reducing the PL properties. Therefore, it is reasonable to assume that PL properties of nano-structures can be enhanced if the already existing carboxylic acid and epoxy groups are reduced by converting them to amide or amine groups.…”

Section: Introductionmentioning

confidence: 99%

Amine‐ and Polyethylene glycol‐Functionalized Pyrediyne Quantum Dots for Bioimaging Applications

Arya,

Vasudha,

Muthuvijayan

et al. 2024

ChemistrySelect

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Pyrediyne, a recent addition to the 2D organic nanomaterials family, is known for its improved electrical conductivity, which can have potential applications in the performance of thin film transistors, field effect transistors, and charge storage devices. It has been shown that similar to carbon quantum dots, pyrediyne quantum dots (PDYQDs) can also be generated from 2D pyrediyne nanosheets and can be utilized for imaging cancer cells. In this context, it is highly desirable to enhance the photoluminescence properties of PDYQDs in order to improve the quality of quantum dots‐based cell imaging techniques. Herein, PDYQDs are effectively functionalized using aqueous functionalization agents such as NH3, PEG200, and PEG20000 via a simple and cost‐effective methodology, which resulted in a significant enhancement in the emission quantum yield (QY) (up to 30.2 %) through effectively reducing the non‐radiative recombination centers. After confirming their cytocompatibility using in vitro studies, the amine‐functionalized PDYQDs were utilized for imaging L929 mouse fibroblast cells. The findings in the present study suggest that it is worth exploring various surface functionalization techniques to enhance the applications of novel carbon‐based nano‐structures in various biological and optoelectronic devices.

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