AFM ATOMIC FORCE MICROSCOPYmitr.p.lodz.pl/raman/zajecia/moderntechniques/Lecture3.pdf · Typical...
Transcript of AFM ATOMIC FORCE MICROSCOPYmitr.p.lodz.pl/raman/zajecia/moderntechniques/Lecture3.pdf · Typical...
-
AFM ATOMIC FORCE MICROSCOPY
-
Typical configuration of an AFM. (1): Cantilever, (2): Support for cantilever, (3): Piezoelectric element(to oscillate cantilever at its eigen frequency.), (4): Tip (Fixed to open end of a cantilever, acts as the probe), (5): Detector of deflection and motion of the cantilever, (6): Sample to be measured by AFM, (7): xyz drive, (moves sample (6) and stage (8) in x, y, and z directions with respect to a tip apex (4)), and (8): Stage
-
Abilities: force measurement imaging and manipulation
0 20 40 60 80 100-3000
-2000
-1000
0
1000
2000
3000
4000
dis
tan
ce [
nm
]
distance [m]
0 20 40 60 80 100-1000
0
1000
2000
3000
4000
5000
dis
tan
ce [
nm
]
distance [m]
-20 0 20 40 60 80 100 120 140
-3000
-2000
-1000
0
1000
2000
3000
4000
5000
dis
tan
ce [
nm
]
distance [m]
4600 4800 5000 5200 5400 5600
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
V
distance [nm]
-
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.50
2
4
6
8
10n
um
be
r o
f s
am
ple
s
average value of Young's modulus [MPa]
MY healthy tissue
P149
-
NIŻSZY MODUŁ YOUNGA DLA TKANEK PRAWIDLOWYCH
-
Penetration depth DZ is calculated using the formula: