Abstract
A carbon onion layer compounded with gold was formed by dispersing carbon onions on a silicon wafer coated with gold. Its solid lubricant properties were measured in vacuum ball-on-disk type friction test. The carbon onion layer compounded with gold has kept lower-friction coefficient of 0.03 for a longer time than gold layer in a certain range of gold film thicknesses and normal forces. For achieving longer lifetime of the low-friction property, coating a self-assembled monolayer (SAM) on gold thin film were attempted. SAM coating contributed to longer lifetime of the low-friction property, in addition, carbon onion layer on a SAM exhibited the low-friction property under a wide range of normal forces.
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