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huazet2000
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2Â¥2007-07-26 08:53:51
3Â¥2007-07-26 20:27:06
lingyun79
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a strong sharp peak at 1577.7 cm-1 (G line), which can be assigned to the high-frequency E2g first-order mode, and a strong sharp peak at 1349.9 cm-1 (D line) as well as a weak peak, appeared as a shoulder peak of G line, at 1612.9 cm-1 (D¢ line). The origin of the D and D¢ lines has been explained as disorder-induced features due to the finite particle size effect or lattice distortion of graphite crystals. Therefore, the very strong relative intensity of the D line may be the result of a high lattice distortion of graphite crystals in the HCNTs. The weak peak at 1099.0 cm-1 was rarely reported previously. The peak at 2447.0 cm-1 was frequently reported previously, but the origin of it remains uncertain. Here, the peak 2447.0 cm-1 seems to be the combination of D line and the peak 1099.0 cm-1 (1349.9 + 1099.0 ) 2448.9). [ Last edited by lingyun79 on 2007-7-26 at 23:13 ] |
4Â¥2007-07-26 23:11:42














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