Biomedical Engineering Reference
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Figure 17.13
Fringe patterns corresponding to higher order frequencies of the FT of the nanocrystal without
central symmetry: the spatial frequency of line patterns are 8.3 nm (A), 5.6 nm (B), and 5.3 nm
(C); (D) frequency modulation of interference fringes due to the distortion of plane wavefronts
produced by the crystal deposition on the upper surface of the microscopic slide
[23]
.
Table 17.2: Determination of Thickness of Analyzed Nanocrystals
Nanocrystal
Length (nm)
t
fs
(nm) Optical
Path Change
t
s
(nm) Image
Shift
t
av
5
(t
fs
1
t
s
)/2
(nm)
Standard
Deviation (nm)
54
58
48
53
6
5
55
30
37
33.5
6
3.5
86
a
101
107
104
6
3
120
46
46
46
6
0
a
Image size was 1024
86 nm has a
stepped face, t
av
corresponds to the average of the face profile shown in
Figure 17.15D
that gives an average value of
105 nm.
3
1024 pixels; size of all other images was 512
3
512 pixels. Since the nanocrystal L
5
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