Preparation of Conductive Carbon Films from Novolac Resins by Ion Beam Irradiation and Carbonization

Abstract

In this study, thin carbon films with good electrical properties were prepared using commercial novolac resins by ion beam irradiation and carbonization. Novolac films were irradiated with ion beams and then carbonized under inert atmosphere. Based on the FTIR and UV results, the novolac resins were found to be crosslinked by ion beam irradiation without any additives. The Raman and XRD results indicate that carbon films with pseudo-graphitic structures were formed by carbonization of the ion beam irradiated novolac films. The sheet resistance of the prepared carbon films decreased to 1.35 × 102 Ω/ with an increasing fluence. The prepared carbon films showed a good electrical conductivity of ∼2.34 × 102 S/cm.

Interfacial Ammonia Selectivity, Atmospheric Passivation, and Molecular Identification in Graphene-Nanopored Activated Carbon Molecular-Sieve Gas Sensors

“…Furthermore, for commercialized applications, the induced selectivity must be achieved using a scalable and lithographically compatible fabrication process. These requirements make porous activated carbon (a-C) suitable for this application since it is easily generated by chemical/lithographic modification and subsequent pyrolysis of polymeric precursors such as Novolac resin − while possessing good gas molecular sieving properties and ammonia selectivity. − High sensitivity ammonia detection is required for environmental monitoring and noninvasive diagnosis of urea cycle disorder, kidney problems, − or ulcers resulting from Helicobacter pylori bacterial infection in the stomach. , …”