BORON AND PHOSPHORUS-DOPED GLASSY-CARBON - I - SURFACE-PROPERTIES

The effects of boron and phosphorus incorporation in phenolic resin pr ecursor on the surface properties of glassy carbon (GC) have been stud ied. Characterization of the surface properties using X-ray photoelect ron spectroscopy and mass spectrometry analysis of desorption products showed that boron and phosphorus doped GC contained more carbon-oxyge n complexes on the surface than undoped GC. The thermal decomposition of the surface oxide species, resulting in desorption of CO and CO2 as major gas products, showed that the presence of heteroatoms affects t he nature of the surface oxide species and contributes to their increa sed stability. The presence of stable surface oxide species promotes t he increased oxidation resistance of doped GC samples. (C) 1997 Elsevi er Science Ltd.