FemtoScan

Microscope features: FemtoScan 001- the first Internet-driven microscope Multiprocessor operation Digital feedback Full computer control Multitasking regime Simultaneous acquisition up to 8 images in different modes

FemtoScan 001 Specifications

FemtoScan AFM/STM main base
True vertical probe/sample initial approach
Initial approach ? step motor
Initial approach range ? up to 4 mm
Initial approach step size ? 30 nm
Typical thermal drift ? less than 1 nm/s
Sample position ? horizontal
Sample size ? up to 15 mm in diameter, 5 mm in height
Scan size ? 2 m or 10 m
Scan rate ? up to 30 Hz
Sample holder ? magnetic

FemtoScan STM Head
Height, Deflection, I(U), I(Z) Modes
Interleave, DualTrace, Lithography Modes
Tunnel current ranges: 10 pA - 20 nA, 0.01 pA - 1 nA
Bias voltage ±9 V
Tip diameter 0.1 - 0.4 mm
Resolution ? atomic on graphite

FemtoScan AFM Head
Height, Deflection and Friction Modes
Resolution ? atomic on mica
Resonant Modes (semi-contact)
Lift, Interleave, DualTrace, Lithography Modes

FemtoScan SRM (Scanning Resistive Microscope) Head
Resolution ? 1 nm
Electric current ? 10 pA - 10 nA

FemtoScan Controller Electronics
Data and feedback control using Digital Signal Processor with a 133 MHz frequency for arithmetic operations
X, Y, and Z high voltage amplifiers with ±135 V output range
7 DACs with 16 bit resolution and 10 ms sampling time for X, Y, Z, and U signals, 3 optional DACs
2 frequency generators, 32 bit frequency resolution, 12 bit phase resolution, 10 bit amplitude resolution
Two input ADCs with 16 bit resolution and 10 ms acquisition time
Tunnel voltage amplifier with ±10 V output range

FemtoScan Sample Heater (optional)
Temperature rate ? up to 80 ^oC
Temperature accuracy ? 0,05 ^oC
Thermal drift during heating (max):
? 100 nm/ ^oC (normal direction), 40 nm/ ^oC (lateral direction)