Double walled carbon nanotubes are especial class of carbon nanotubes, comprise of two nanotubes placed inside one another. Varying degrees of interaction between the two tubes due to the differences in the diameter of the tubes results in unique and interesting optical, mechanical and electronic properties. DWCNTs can be applied in many different areas such as emission displays (FEDs) and field emission transistors (FETs) whereby their impressive properties. For applications requiring the highest quality, we offer Double Walled Carbon Nanotubes with low prices. Technical Properties: Purity > 65 % Color black Length 48 �m OD 2-4 nm ID 1-3 nm Tap Density 0.15 g/cm3 True Density 2.2 g/cm3 Ash 1.5 wt% Electrical Conductivity 98 S/cm Manufacturing Method CVD Applications: Double Walled Carbon Nanotubes have a variety of potential applications in different fields. These applications include medicine, mechanics, electric-electronics, chemicals, energy and others. It can be applied in, drug delivery, biosensors, CNT composites, catalysis, nanoprobes, hydrogen storage, lithium batteries, gas-discharge tubes, flat panel displays, supercapacitors, transistors, solar cells, photoluminescence, templates.