Few-layer graphene (<3 layers) • Ultra-high electrical conductivity (>10³ S/m) • Large surface area (>500 m²/g)

Sigma-Aldrich™ Graphene Powder is a high-quality, few-layer graphene material with <3 layers, exceptional electrical conductivity (>10³ S/m), and a high BET surface area (>500 m²/g). This material combines ultra-thin graphene platelets with lateral dimensions of 0.5–5 μm, enabling outstanding electronic, mechanical, and electrochemical performance.

With its pristine carbon structure and minimal defect density, this graphene powder is engineered for advanced research applications across flexible electronics, battery electrodes, supercapacitors, biosensors, coatings, and nanocomposites.

Key Features & Benefits

Few-Layer Structure (<3 Layers)

• Near-monolayer behavior
• Improved conductivity and charge mobility
• Enhanced mechanical flexibility and high surface reactivity

High Electrical Conductivity (>10³ S/m)

• Suitable for energy devices, transparent electrodes, printed electronics
• Excellent for EMI shielding, electrochemical sensors, and composites

Large BET Surface Area (>500 m²/g)

• Increases electrochemical active sites
• Supports high-capacitance electrode designs
• Enhances adsorption in environmental and catalytic applications

Optimized Morphology

• Lateral size: 0.5–5 µm
• Uniform flake distribution
• High mechanical strength and chemical stability

Chemical & Physical Information

(Note: Si/C/H/O notation indicates possible trace elements from synthesis routes.)

General Description

Graphene is a single-atom-thick 2D carbon sheet arranged in a honeycomb lattice of sp²-bonded carbon atoms. Few-layer graphene (<3 layers) preserves the remarkable properties of monolayer graphene while offering improved stability and easier processability.

Common preparation routes include mechanical exfoliation, micromechanical cleavage, arc discharge, and chemical vapor deposition (CVD). Due to its exceptional physical and chemical properties—high mechanical strength, optical transparency, chemical stability, and electrical conductivity—graphene plays a key role in next-generation nanotechnologies.

Applications

1. Flexible & Printed Electronics

• Transparent flexible electrodes
• Stretchable conductive films
• Printed conductive inks
• Wearable sensors and displays

2. Energy Storage

• Battery anodes/cathodes (Li-ion, Na-ion, solid-state batteries)
• Supercapacitor electrodes with high energy/power density
• Graphene-based current collectors

3. Electrochemical and Biosensors

• Heavy metal detection (e.g., graphene/polyaniline modified electrodes)
• Biomolecule sensing (glucose, dopamine, immunosensors)
• Electrochemical analysis platforms

4. Environmental & Catalytic Applications

• High-surface-area adsorbents for CO₂ capture
• Catalytic supports for metal nanoparticles
• Antifouling and anti-corrosion coatings

5. Nanocomposites & Coatings

• Mechanical reinforcement agent
• Conductive polymer nanocomposites
• Anti-corrosion barrier films

Features and Benefits

• Superior electrical conductivity for advanced electronics
• High flexibility for foldable and stretchable devices
• Mechanical strength ideal for reinforcing polymer matrices
• Large surface area for electrochemical and adsorption systems
• High purity and reproducibility suitable for research and prototype development

Ordering Information

Sigma-Aldrich™ Graphene Powder (<3-layer, high-conductivity) is a premium nanomaterial engineered for printed electronics, energy storage, catalysis, sensors, nanocomposites, and advanced materials research. Its combination of ultra-high surface area, few-layer thickness, strong conductivity, and controlled morphology makes it ideal for cutting-edge scientific and industrial applications.