Blogs, nanopowder   0   19 March 2025

What are Graphene Quantum Dots?

Graphene Quantum Dots (GQDs) are nanoscale fragments of graphene with unique electronic, optical, and photoluminescent properties. They exhibit high surface area, excellent conductivity, and tunable fluorescence, making them ideal for advanced applications in bioimaging, optoelectronics, and energy storage.

Chemical Properties and CAS Number

  • Material: Graphene Quantum Dots (GQDs)
  • CAS Number: Not standardized (varies based on synthesis method)
  • Purity: 99%+
  • Particle Size: 1-10 nm
  • Surface Functional Groups: -OH, -COOH, -NH2
  • Fluorescence Emission: Tunable (blue, green, red)
  • Solubility: Water-soluble, ethanol-soluble

Applications of Graphene Quantum Dots

1. Biomedical Imaging and Drug Delivery

GQDs are used as biocompatible, non-toxic fluorescent markers in imaging and targeted drug delivery systems.

2. Optoelectronics and Photonics

Applied in LEDs, lasers, and display technologies due to their tunable fluorescence properties.

3. Energy Storage and Conversion

Enhances performance in lithium-ion batteries, supercapacitors, and fuel cells.

4. Sensing and Detection

Used in chemical and biosensors for detecting heavy metals, biomolecules, and environmental pollutants.

5. Catalysis and Photocatalysis

Acts as an efficient catalyst in photocatalytic degradation and hydrogen production.

Pricing of Graphene Quantum Dots

Pricing depends on purity, particle size, and supplier:

  • Small Lab-Scale Orders: $50 – $500 per gram
  • Bulk Industrial Orders: $1,000 – $5,000 per kg
  • Custom Functionalized GQDs: Prices vary based on functional groups and applications

Factors Influencing Pricing

  • Purity and functionalization (-OH, -COOH, -NH2 groups)
  • Particle size distribution
  • Fluorescence wavelength and emission efficiency
  • Supplier and market demand

Conclusion

Graphene Quantum Dots (GQDs) offer a versatile and advanced material for applications ranging from bioimaging to energy storage. Their tunable fluorescence and high conductivity make them highly valuable in next-generation technologies.

Leave a Reply