Biomedical Engineering Reference
In-Depth Information
a
b
20
µ
m
1 cm
c
d
e
5
µ
m
0.5
µ
m
0.5
µ
m
f
g
Fig. 8.37
(
a
) Optical image of
A. graafi
.(
b
) Optical microscopic image of a greenish white
stripe under 500
magnification. (
c
) Cross-sectional SEM image of a green scale. (
d
)Close-up
cross-sectional SEM image of the interior of a green scale. (
e
) Cross-section of a generated RCP
structure of equal spheres with surfaces roughened arbitrarily. (
f
)and(
g
) Histogram of the 2D
radial distribution function with (
f
) for the RCP structure in the green scale and (
g
) for the generated
one, where
d
is the diameter of nanoparticles (Reproduced from [
148
])
The functions of natural photonic structures are closely related to their evolution.
Structural coloration in animals often serves primarily as intraspecific communi-
cation such as species recognition, mate choice, and intrasexual competition, and
also as interspecific interactions such as predator avoidance by using aposematic
