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【答案】应助回帖
王灵杰(金币+150, 翻译EPI+1): 谢谢！ 2011-05-31 11:08:13
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The intensity ratio of the D and G bands (ID/IG) is commonly used to evaluate the quality of carbon materials.D带和G带强度比常常用来评价碳材料的质量。 No obvious D band was observed for any of the MWCNTs dispersed on substrates (Supplementary Fig. 6), suggesting the high quality of the starting materials. 对任何分散在基质中的MWCNTs，均未能观测到明显的D带，提示起始原料良好的质量。The average ID/IG values were respectively 0.38, 0.30 and 0.28 for our single-, bi- and trilayer GNRs with 10–20-nm widths. 我们宽度为10-20nm的单、双和三层GNR的平均ID/IG 值分别为0.38、0.30和0.28。 Because defect density on the pristine MWCNTs was low, the D-band Raman signal of our GNRs should be mainly due to their open edges24,25. 由于原始MWCNT的缺陷密度低，所以我们的GNR的D带拉曼信号主要应该是由于它们开放的边缘。The ID/IG values were lower than those for GNRs obtained by lithographic etching of pristine graphene sheets (ID/IG was ,2 for a bilayer GNR of,28-nm width obtained by lithographic patterning (X. R. Wang et al., unpublished data); see Supplementary Fig. 5),indicating the high quality of our GNRs, in particular the high degree of edge smoothness.这些ID/IG值比由平板印刷蚀刻原始石墨烯片之躯的GNR的ID/IG值要低，提示我们的GNR具有较好的质量，尤其具有高度的边缘平衡度。 |
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