Highly adhesive, transparent and conductive single-walled carbon nanotube film

Transparent conductive single-walled carbon nanotube (SWNT) film was fabricated by spraying onto polyethylene terephthalate (PET) substrates coated with a thin polymethyl methacrylate (PMMA) layer. The PMMA layer of a thickness ∼1 µm was used as an adhesion promoter between the PET substrate and the SWNTs. The electrical conductivity of SWNT film was improved by treatments in nitric acid (HNO
3
) and thionyl chloride (SOCl
2
). The SWNT film obtained through this manufacturing method showed a sheet resistance of 150 Ω/sq with a transmittance of 80%. The film also revealed a high adhesion on the substrate, and the resistance change with the bending angle was small.