Abstract
Graphene oxide (GO) and GO/poly(benzimidazobenzophenanthroline) (BBL) films were reduced by ultraviolet (UV) irradiation. UV-assisted reduction, by the removal of oxygen-containing groups from the GO and the GO/BBL nanocomposite films, was confirmed with Raman and X-ray photoelectron spectroscopies. The UV reduction of the GO film in selective regions was successfully demonstrated with patterning of the letters KNU. The sheet resistance of the BBL/GO film (GO content=80 wt%) on the glass substrate was ∼106 Ω/□ after UV irradia-tion (25 mW/cm2) for ∼2 h. Furthermore, the electrically insulating GO in the BBL/GO nanocomposite film on the glass substrate became electrically conductive after UV reduction.
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