Fig. 7From: Infrared, Raman and Magnetic Resonance Spectroscopic Study of SiO2:C NanopowdersThe structural modification of the carbon layer structure in SiO2:C with increase of the temperature annealing. a Initial SiO2:C. b T ann = 500 °C. c T ann = 700 °C. d T ann = 800 °CBack to article page