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Õ¾ÄÚËÑË÷ÁËÏ£¬·¢ÏÖÌÖÂ۵ĸßÈËͦ¶à£¬¿ÉÊÇ»¹ÊÇÓÐһЩÒÉÎÊ£º ʯī»¯Ì¼µÄÀÂü¹âÆ×ÊDz»ÊÇÖ»ÔÚ1580cm-1ÓÐÒ»¸ö·å£¿ ¶øÎÞ¶¨ÐÎֻ̼ÔÚ1340cm-1ÓÐÒ»¸ö·å£¿ Èç¹û1340ºÍ1580´¦¸÷ÓÐÒ»¸ö·å£¬ÊDz»ÊǾʹú±íËù²â̼²ÄÁϲ¿·Öʯ£¿ ¿´µ½Ò»ÆªÎÄÕÂÀïÃæÓÐÕâÑùÒ»¶ÎÃèÊö£¬²»ÊǺÜÃ÷°× The Raman spectrum of the as-obtained carbon microtubes is show in Figure 4, in which a broad peak at 1334 cm-1 as well as a sharp absorption peak at 1600 cm-1 can be clearly seen. The peak at 1334 cm-1 is usually associated with the vibrations of carbon atoms with dangling bonds for the in-plane terminations of disordered graphite and is labeled as the D-band, and the peak at 1600 cm-1 (G-band) (corresponding to the E2g mode) is closely related to the vibration in all sp2 bonded carbon atoms in a 2-dimensional hexagonal lattice, such as in a graphene layer.26,27 The intensity ratio of the D to G band (ID/IG) is calculated to be 0.64, further reflecting the relative disorder and low graphitic crystallinity of the CMTs. |
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