Optimization of graphene quantum dots by chemical exfoliation from graphite powders and carbon nanotubes

Gu, Siyong; Hsieh, Chien‐Te; Chiang, Yu-Ming; Tzou, Dong-Ying; Gandomi, Yasser Ashraf

doi:10.1016/j.matchemphys.2018.05.016

Cited by 26 publications

(16 citation statements)

References 35 publications

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“…Chemical oxidation method, also known as oxidation cutting method, is a very widely used method, in which carbon bonds of graphene, GO or carbon nanotubes are usually destroyed by H 2 SO 4 , HNO 3 or other oxidants [39][40][41][42][43].…”

Section: Chemical Oxidation Methodsmentioning

confidence: 99%

Synthesis of graphene quantum dots and their applications in drug delivery

et al. 2020

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This review focuses on the recent advances in the synthesis of graphene quantum dots (GQDs) and their applications in drug delivery. To give a brief understanding about the preparation of GQDs, recent advances in methods of GQDs synthesis are first presented. Afterwards, various drug delivery-release modes of GQDs-based drug delivery systems such as EPR-pH delivery-release mode, ligand-pH delivery-release mode, EPR-Photothermal delivery-Release mode, and Core/Shell-photothermal/magnetic thermal delivery-release mode are reviewed. Finally, the current challenges and the prospective application of GQDs in drug delivery are discussed.

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Section: Chemical Oxidation Methodsmentioning

confidence: 99%

Synthesis of graphene quantum dots and their applications in drug delivery

et al. 2020

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“…GQDs are a 0D material with sizes below 10 nm and characteristics deriving from graphene and carbon dots. GQDs can be readily synthesized by pyrolyzing citric acid and dispersing the carbonized products into alkaline solutions [80], exfoliation [81], and hydrothermal methods [82], among others [80].…”

Section: Carbon Nanostructuresmentioning

confidence: 99%

Hybrid Nanobioengineered Nanomaterial-Based Electrochemical Biosensors

Soto

Orozco

2022

Molecules

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Nanoengineering biosensors have become more precise and sophisticated, raising the demand for highly sensitive architectures to monitor target analytes at extremely low concentrations often required, for example, for biomedical applications. We review recent advances in functional nanomaterials, mainly based on novel organic-inorganic hybrids with enhanced electro-physicochemical properties toward fulfilling this need. In this context, this review classifies some recently engineered organic-inorganic metallic-, silicon-, carbonaceous-, and polymeric-nanomaterials and describes their structural properties and features when incorporated into biosensing systems. It further shows the latest advances in ultrasensitive electrochemical biosensors engineered from such innovative nanomaterials highlighting their advantages concerning the concomitant constituents acting alone, fulfilling the gap from other reviews in the literature. Finally, it mentioned the limitations and opportunities of hybrid nanomaterials from the point of view of current nanotechnology and future considerations for advancing their use in enhanced electrochemical platforms.

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“…There are several processes for the top-down approach of GQDs, such as oxygen cutting, physical grinding, hydrothermal/solvothermal, reductive cutting, electrochemical, etc. Oxygen cutting is one of the utmost used techniques, also known as chemical oxidation [30][31][32][33] . In this technique, bulk carbon materials (graphite, carbon black, charcoal (CC), carbon fiber (CF), graphene, graphene oxide (GO) are typically cleaved to small fragments by sulfuric acid (H2SO4), nitric acid (HNO3), or other oxidants.…”

Section: Top-down Approachesmentioning

confidence: 99%