Civil Engineering Reference
In-Depth Information
Prolate
a
Oblate
c
ћ
w
a
c
Aspect ratio:
m
=
a
/
c
m
=
c
/
a
e
m
e
p
100
VO
2
semiconducting
Metallic
90
80
70
60
50
40
30
0.1
0.2
0.5 1
Aspect ratio
2
5
10
m
100
VO
2
semiconducting
Metallic
90
80
70
60
50
40
30
0.1
0.2
0.5 1
Aspect ratio
2
5
10
m
11.8
The upper panel depicts a structural model for a composite with
randomly oriented nanoparticles having a dielectric function
ε
p
in a
medium with the dielectric constant
ε
m
. Electromagnetic radiation with
photon energy
¯
ω
is indicated. The middle and lower panels show
computed data on luminous and solar transmittance, respectively, vs.
the aspect ratio
m
for VO
2
-containing composites in semiconducting
(
τ
<
τ
c
) and metallic (
τ
>
τ
c
) states. Prolate and oblate spheroids are
characterized by
m
>
1 and
m
<
1, respectively. After Li
et al.
(2010).
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