Synthesis and Optical Characterization of Mg_1-xNi_xO Nanostructures

Table 1

Optical absorption peaks observed in Mg_1-𝑥Ni_𝑥O nanopowders, prepared by decomposition of dried sol-gel-derived oxalate at 600°C for 2 h each in air for nickel content (𝑥) = 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].
^+ 1A_1g→ ¹T_1u(1s→2p_𝑥,2p_𝑦,or2p_𝑧).
^# 1A_1g→ ¹E(1s→2p_𝑥or2p_𝑦).
^† 1A_1g→ ¹A_1g(1s→2p_𝑧).