Veeco 004-210-000, Instruction Manual

Page: 276 / 358

Electric Force (EFM) Imaging
Electric Field Gradient Detection—Procedures
256 MultiMode SPM Instruction Manual Rev. B
14.4 Electric Field Gradient Detection—Procedures
Note: Amplitude detection is the only procedure described here that can be done
without the Basic Extender Module; however, this method is no longer
recommended (see “Without Basic Extender Module” on page 259).
1. Locate the two toggle switches on the backside of the Basic Extender box ( Figure 14.4a ),
then verify that they are toggled as shown in Table 14.4a .
Figure 14.4a Toggle Switches on Back of Basic Extender Module
Table 14.4a Basic Extender Module Toggle Switch Settings
Note: The toggle switch combination of Surface Potential = ON and Analog2 = ON is
not recommended and can produce erratic, unde fi ned results.
2. Electrically connect the sample by mounting it to a standard sample disk or stage using
conducting epoxy or silver paint. Ensure the connection is good; a poor connection will
introduce noise.
Mode Tip or Sample Voltage
FM/Phase Surface
Potential GND/Surface
Potential Analog 2
TappingMode
Contact AFM
MFM
√ √
Surface
Potential
√ √
Apply voltage
to tip or sam-
ple (Use for
electric
fi eld
gradient
imaging; tun-
neling AFM)
√ √
FM/Phase
Surface Potential
Gnd/Surface Potential
Analog 2
Mode
Tip or Sample
Voltage
To
NanoScope
To
Microscope