Premium Research Grade Carboxylation Graphene Quantum Dots For Fluorescence Materials 10nm

Ridgehart Premium Carboxylated Graphene Quantum Dots (GQDs) are high-purity, water-soluble nanomaterials engineered for advanced fluorescence applications. With particle sizes below 10 nm and a rich surface of carboxyl (–COOH) functional groups, these GQDs deliver strong, stable, and tunable fluorescence, ideal for research, industrial, and biomedical use.

• Ultra-Small Particle Size (< 10 nm): Ensures strong quantum confinement and high photoluminescence efficiency.
• Solvent : Water 
• Synthesis Method : Organic synthesis
• Purity : 99.9%.
• Quantum Yield : 5%.
  
• Appearance : Pale Yellow Powder
• Light Intensity : Low luminescence intensity, If you need a high intensity version please contact us.
• Carboxyl-Functionalised Surface: Rich –COOH groups improve solubility, reactivity, and compatibility with polymers, biomolecules, and aqueous systems.
• Water-Soluble and Easy to Disperse: Forms stable, clear solutions—ideal for fluorescence composites and bio-labelling.
  
• Excitation-Dependent Fluorescence: Emission color varies with excitation wavelength, enabling multi-color imaging and detection applications.
• High Photostability and Chemical Stability: Maintains fluorescence intensity over long periods and under diverse environmental conditions.
• Environmentally Friendly Composition: Free from heavy metals, research grade safety for lab and industrial applications compared to traditional quantum dots.
• Customizable Options: Available in different concentrations, dispersions. Please contact customer support to discuss. 
• Consistent Batch Quality Assurance : Tight size distribution and purity control ensure reproducibility in research and product manufacturing.

Key Advantages:

• High aqueous dispersibility and chemical stability.
• Easy bioconjugation with biomolecules (via amide bonds).
• Excellent fluorescence quantum yield and low toxicity.
• Tailorable optical and electronic properties by size and surface chemistry.

Storage Conditions:

The powder should be stored in a dry environment, protected from light, and maintained at ambient low humidity conditions. The powder can be dried in an oven at 60℃ for 30 minutes before use. Recommended shelf life is 3 months under proper storage once unsealed.
For solution preparation, dissolve the material as required and store the solution at 4 °C, protected from light, to preserve stability and performance. Recommended shelf life is 3 months under proper storage once unsealed.

Application Uses:

• Energy Storage: Used as additives in supercapacitors, lithium-ion, and sodium-ion batteries, improving charge transfer and electrode stability.
• Catalysis: Serve as catalyst supports or active sites for photocatalysis, electrocatalysis (e.g., water splitting, CO₂ reduction).
• Optoelectronic Devices: Used in LEDs, photodetectors, and solar cells for light emission and charge transport enhancement.
• Fluorescent Probes: Excellent for pH sensing or metal ion detection due to environment-sensitive luminescence.
• Surface Functionalisation Studies: Serve as model systems for studying molecular attachment and charge transfer at nanoscale interfaces.
• Quantum Computing: As potential qubits due to their tunable band-gap and stable emission.
• Antibacterial Coatings: Carboxylated GQDs generate ROS, inhibiting microbial growth on surfaces.
• Bioimaging and Cell Tracking: GQDs fluoresce under UV/visible light, allowing labeling and imaging of cells, tissues, and biomolecules.
• Carboxyl groups improve water solubility and biocompatibility, reducing cytotoxicity compared to traditional quantum dots (e.g., CdSe).
• Drug Delivery: The carboxyl groups allow covalent attachment of drugs, peptides, or targeting ligands.
• Their small size (∼10 nm) facilitates cellular uptake and intracellular transport.
• Biosensing: Functionalization enables selective detection of biomolecules (e.g., glucose, dopamine, DNA).
• Fluorescence quenching/turn-on mechanisms make them ideal optical biosensors.
• Photothermal & Photodynamic Therapy: GQDs can generate reactive oxygen species (ROS) or heat under light irradiation, useful for cancer therapy. 
• Sensing and Detection: Detect heavy metals (Pb²⁺, Hg²⁺, etc.) or organic pollutants via fluorescence quenching.
• Photocatalytic Degradation: Used to break down dyes or pollutants in wastewater under visible light.

Many more application uses, please enquire.