A High Rigidity and Precision Scanning Tunneling Microscope with Decoupled and Scans

Figure 4

(a) Atomically resolved graphite image taken in air and at room temperature under constant current mode with a sample-positive bias voltage of 300 mV, a setpoint of 0.8 A, and a scan area 10 Å × 10 Å. (b) and (c) Two repeated image scans of 8 Å × 8 Å with a time interval of 5 min, in which the drifting rate of the green line can be measured. The line profile for the green line in each image is given at the bottom, in which the average corrugation is 0.41 nm (error range 0.03). (d) direction drifting distance measured as a function of time, which gives a drifting rate of about 0.1 Å/min when the STM head gets stable.

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