Epoxy-based carbon films with high electrical conductivity attached to an alumina substrate

摘要

Carbon-based films(0.8-13 nm thick)with good bonding to the substrate and high process-ability were produced at 650 °C on an alumina substrate,using SU 2.5 bisphenol-A type novolac epoxy(plus triethyleneteramine curing agent)as the carbon precursor.This precursor gave crack-free and scratch resistant carbon films.Interconnected filamentary nickel nanoparticles were more effective for conductivity enhancement than silver nano-particles or multiwalled carbon nanotubes at 5 vol.% or below,in spite of the high conductivity of silver and the high aspect ratio of nanotubes.The carbon film with 2.5 vol.% nickel showed resistivity 6 X 10~(-3)OMEGA cm.