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vasp001金蟲 (正式寫手)
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[交流]
【求助】請(qǐng)大家科普一下拉曼光譜的D-band,G-band,RBM 已有8人參與
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在graphene,graphite,carbon nanotube中,請(qǐng)問(wèn)這幾個(gè)帶,是如何在拉曼光譜上確定的?尤其是,這個(gè)RBM(徑向呼吸模式) 有什么特殊的地方嗎? [ Last edited by vasp001 on 2010-7-8 at 21:59 ] |
拉曼光譜 | 電池 | 好東西 | Raman |
表征相關(guān) |

至尊木蟲 (職業(yè)作家)
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可以讀讀下面的3篇文獻(xiàn): Phys. Chem. Chem. Phys., 2007, 9, 1276 - 1290, DOI: 10.1039/b613962k Studying disorder in graphite-based systems by Raman spectroscopy M. A. Pimenta, G. Dresselhaus, M. S. Dresselhaus, L. G. Cançado, A. Jorio and R. Saito http://www.rsc.org/Publishing/Jo ... le.asp?doi=b613962k J. Chem. Phys. 53, 1126 (1970); doi:10.1063/1.1674108 (5 pages) Raman Spectrum of Graphite F. Tuinstra and J. L. Koenig http://jcp.aip.org/jcpsa6/v53/i3/p1126_s1?isAuthorized=no Raman Spectroscopy of Carbon Nanotubes in 1997 and 2007 M. S. Dresselhaus,*‡ G. Dresselhaus,§ and A. Jorio J. Phys. Chem. C, 2007, 111 (48), pp 17887–17893 DOI: 10.1021/jp071378n http://pubs.acs.org/doi/abs/10.1021/jp071378n 下面的這一段話是從文獻(xiàn)J. Phys. Chem. C 2008, 112, 10637–10640的Introduction拷貝出來(lái)的。 Raman spectroscopy has historically been used to probe structural and electronic characteristics of graphite materials, providing useful information on the defects (D-band), in-plane vibration of sp2 carbon atoms (G-band), as well as the stacking orders (2D-band).5 The G-band of graphite materials is a doubly degenerate (TO and LO) phonon mode (E2g symmetry) at the Brillouin zone center,6 whereas the D-band is due to phonon branches around the K point and requires a defect for its activation.5 The evolution of the 2D-band for different graphene sheets has been used for determining graphene thickness as well as for probing electronic structures through the double resonance process.7,8 The symmetric and sharp 2D-band (~30 cm-1) can be used as a detector for monolayer graphene.7,8 |
至尊木蟲 (職業(yè)作家)
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見這里。 b613962k.pdf http://good.gd/602764.htm |
鐵桿木蟲 (著名寫手)
木蟲 (正式寫手)
金蟲 (正式寫手)

木蟲 (正式寫手)
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這幾個(gè)Band都有其非常特殊的振動(dòng)頻率, 對(duì)應(yīng)了各個(gè)材料中相應(yīng)的聲子模式。 例如G-band, 對(duì)應(yīng)的是Gamma點(diǎn)附近的聲子的拉曼散射, 在graphene中, 一般來(lái)說(shuō)頻率在1500cm-1左右, 這個(gè)模式會(huì)隨著材料的摻雜程度等發(fā)生藍(lán)移或者紅移亦或是劈裂。 至于基礎(chǔ)的介紹材料, 可以看Saito的Physical Properties of Carbon Nanotubes, 里面有很詳細(xì)的描述。 |
金蟲 (正式寫手)

金蟲 (正式寫手)


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