A single graphene cylinder. Best for high-performance nanoelectronics and sensors due to superior electron mobility.

Multiple nested cylinders. Preferred for structural composites, conductive coatings, and battery additives because they are more cost-effective for large-scale use.

Before purchasing, you must specify the exact type of CNT needed for your application. Suppliers categorize products by wall structure, purity, and form.

Nanotubes chemically modified (e.g., Carboxylated -COOH or Hydroxylated -OH) to improve solubility or bonding in specific solvents and resins. 2. Top Reputable Suppliers

Buying carbon nanotubes (CNTs) online requires navigating a specialized market where material properties, purity, and safety regulations are critical. Most reputable suppliers cater primarily to research institutions, laboratories, and industrial manufacturers rather than individual consumers.