Dr. Vitalii Stetsovych
No contacting metal tip over a conducting surface, tunneling current between the sample and tip
- Constant current mode- changing the position/height of the tip over the surface –image of the surface, atomic precision
- Constant height mode- changing the voltage between the tip and the sample - scanning tunneling spectrum
VT-STM by Omicron
Conductive Samples, atomic resolution
Working temperature range: 50K - 300 K;
LHe or LN2 cryostat;
Scan range X/Y/: 15μm x 15μm;
Z-resolution: atomic resolution - material dependent
Tunneling current: < 1pA – 300nA;
Gap voltage: ±5mV to ±10V; applied to tip, sample grounded;
UHV chamber 10-10 - 10-11 mbar;
¨*in situ* sample preparation - sputtering/thermal/deposition;
Sample thermal treatment in preparation stage through direct or resistive heating up to 1300K
Reservation
Dr. V. Stetsovych: stetsovychv
fzu [dot] cz
