Table 1:
Optical absorption peaks observed in
nanopowders, prepared by decomposition of dried sol-gel-derived oxalate at 600°C for 2 h each in air for nickel content (
) = 0, 0.01, 0.05, and 0.10.
No.
x
Peak 1
Peak 2
Peak 3
E
(eV)
Abs.
E
(eV)
Abs.
E
(eV)
Abs.
1*
0
6.13
+
0.97
4.20
#
0.20
3.27
†
0.24
2
0.01
6.13
0.98
4.27
0.27
3.35
0.30
3
0.05
6.20
1.15
4.33
0.36
3.22
0.33
4
0.10
6.10
1.09
4.26
0.45
3.09
0.37
*[
5
].
+ 1
1
.
# 1
1
.
† 1
1
.