Observation of Positive Self-Bias in Radio Frequency Atmospheric Pressure Microplasmas.

Negative self-bias is well known at the powered small-sized electrode in low-pressure capacitive-coupled discharge plasmas. In this paper, however, the self-bias at the powered electrode observed in an RF atmospheric-pressure microplasma demonstrates either a positive or negative sign depending on the supplied power and interelectrode gap. [ABSTRACT FROM PUBLISHER]