Application IV
Sample: Langmuir-Blodgett film (DPPC double layer) on mica in H2O
Scan Range: 7 µm × 7 µm
Data Type: topography / Data Range: 6 nm
Each scan line was scanned twice - in standard tapping mode during the
first scan of the line (left data) and with Q-Control being activated
by a trigger signal during the subsequent scan of the same line (right
data). This interleave technique allows a direct comparison of the
results of the two modes obtained on the same surface area while
minimizing drift effects. The observed height of the DPPC layer is
significantly larger in case of imaging with Q-Control, i.e. the film
is compressed less by the probing tip.
Data courtesy of D. Ebeling et al., University of Münster.