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cj之戀新蟲 (小有名氣)
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[求助]
控制合成單壁碳納米管
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The G band appears as a double peak at 1,518 and 1,591 cm-1. The significant curvature in small diameter SWCNTs causes a shift to lower frequencies of the optical vibrations associated with transverse (perpendicular to the tube axis) atomic displacements (the G- band).Although to our knowledge, this splitting has not been observed experimentally for a (6,6) SWCNT, the G+ and G- band splitting (△WG) has been predicted to be 83 cm-1 (ref. 28), in good agreement with the splitting that we observe (△WG=73cm-1). The additional peaks in the range from 400 to 1,200 cm-1 have previously been observed and used as evidence for the presence of armchair SWCNTs, since no peak in this range is present for semiconducting tubes。 |
鐵桿木蟲 (著名寫手)
| G帶顯示的雙峰出現(xiàn)在1518和1591cm-1。小直徑單壁碳納米管(SWCNTs)的有效曲率導(dǎo)致位移到光振動的低頻率,它與橫向(垂直于管軸)原子位移(G -帶)相關(guān)。據(jù)我們所知,盡管這種裂分沒有在一個(6,6)SWCNT實驗中觀測到,但G +和G -帶裂分(△WG)已經(jīng)被預(yù)測為83 cm-1(文獻28),這與我們觀測(結(jié)果)(△WG = 73 cm - 1)有很好的一致性。我們還在400 cm-1到1200 cm-1范圍內(nèi)曾觀察到其它(額外)的吸收峰,它可以作為扶手椅型SWCNTs存在的證據(jù),因為沒有半導(dǎo)體管的峰值在這個區(qū)間內(nèi)存在。 |
新蟲 (小有名氣)
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