Chemistry Reference
In-Depth Information
TABLE 5.1
Comparison of d-spacing measured for carbines obtained by the com-
bustion flame method with natural carbyne and published values for
-carbyne
Present Work
(nm)
Present Work
(nm)
Reference [45]
Present Work
(nm)
References [25 and 39]
Figure 5.7
Figure 5.8
Figure 5.9
0.372
-
0.372
0.212
0.211
0.318
-
0.322
0.175
0.168
0.217
0.212
0.213
0.162
0.163
0.191
0.194
0.194
0.141
0.141
0.180
-
-
0.130
0.129
0.161
0.171
0.166
0.110
0.110
0.145
-
0.150
0.106
-
0.130
-
0.137
0.101
0.102
0.122
0.122
0.122
0.096
0.096
0.110
0.110
0.112
0.090
0.090
0.105
0.101
0.106
0.084
0.086
-
0.090
0.086
0.079
0.081
-
0.078
-
0.075
0.075
-
0.073
-
0.070
0.072
-
0.070
-
0.068
0.068
-
0.060
-
0.066
-
corresponds to a size of 600 nm.The interplanar spacing values are given in
Table 5.1.
5.3.4 A
TOMIC
F
ORCE
M
ICROSCOPY
A
NALYSIS
The deposited carbon film (obtained by combustion flame method) was
studied by using AFM.
Figure 5.10
shows an image of the film surface in
a height mode. The image clearly shows a hexagonal crystal with a size of
about 0.75
m
m (
Figure 5.10(a)
). Analysis of the lateral face of this crystal
showed that the crystal was multilayered (Figure 5.10(b)). The thickness of
the layer was about 8.411 nm. These results are in good agreement with a
structural model of a multilayered tetracarbon film presented by Babaev
and Guseva [47].
According to Heimann et al. [48], for a polyyne chain, the length of
carbon chain is given by
n
2
n
2
r
p
,
C
O
ð
polyyne
Þ¼
r
ð
C
C
þ
1
Þ
r
ð
C
C
Þþ
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