Fabrication of transparent double-walled carbon nanotubes flexible matrix touch panel by laser ablation technique

This study reports on the fabrication of transparent double-walled carbon nanotubes (DWNTs) flexible matrix touch panel using the method of laser ablation. We employed an Nd:YAG laser (1064 nm) to pattern transparent DWNT thin film pre-coated on a PET substrate and successfully fabricated a flexible matrix touch panel. By increasing the laser energy, the ablation depth of transparent DWNT flexible thin film is increased but the sheet resistance (Ω/sq) is decreased. When the laser energy intensity reaches 117 mJ/cm², the DWNTs can be completely ablated from transparent DWNT flexible thin film. This method is rapid, simple, applicable to large-area processing and thus is potential for mass production.