Figure 3: Impact of surface chemistry on dissipation.
From: Single-crystal diamond nanomechanical resonators with quality factors exceeding one million
Three different chemical surface terminations (sketched) are investigated on 15–40 devices of an optical-grade chip. Red dots are 300 K values and blue triangle are 3 K values, and dashed lines serve as guides to the eye. Large variation of Q factors is seen as surface chemistry and thickness are changed, underlining the critical role of surface friction. Very high Q factors, exceeding one million at room temperature, are found for oxygen-terminated devices.
