Table 1 Parameters of EPR signals observed in the initial and annealed SiO2:C samples at 292 K
From: Infrared, Raman and Magnetic Resonance Spectroscopic Study of SiO2:C Nanopowders
T ann | Paramagnetic center | g-factor | N, spins/cm3 |
---|---|---|---|
Initial | SiDB | 2.0055(3) | ~1.5 · 1017 |
CRD | 2.0033(3) | ~2.5 · 1017 | |
500 °C | O-centered CRD | 2.0042(3) | ~3.3 · 1018 |
700 °C | C-centered CRD with a nearby O heteroatom | 2.0035(3) | ~4.1 · 1022 |
800 °C | 2.0035(3) | ~4.2 · 1021 |