Directly observable G band splitting in Raman spectra from individual tubular graphite cones
Directly observable G band splitting in Raman spectra from individual tubular graphite cones
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DOI：
10.1016/j.carbon.2011.03.025
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发表时间：
2011-08
期刊：
影响因子：
10.9
通讯作者：
N. Shang;S. Silva;Xin Jiang;P. Papakonstantinou
中科院分区：
文献类型：
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作者：
N. Shang;S. Silva;Xin Jiang;P. Papakonstantinou
利用室温下的拉曼光谱对单个管状石墨锥(TGC)进行了表征。在1569-1587 cm−处，从根部到顶端直接观察到一条分裂的G带，不需要表面电磁和化学增强效应。G带在1571°±0.2和1584°±0.3 cm−_1处可解卷成两个洛伦兹峰，这可能分别归因于TGC最内管和所有组成管中单个手性激发的共振增强。结果表明，G带分裂可作为管状碳纳米材料单色性的指纹。
Individual tubular graphite cones (TGCs) are characterized using Raman spectroscopy at room temperature. A split G band at 1569–1587 cm−1is directly observed from the root to the tip of TGCs without requiring surface electromagnetic and chemical enhancement effects. The G band can be deconvoluted into two Lorentzian peaks at 1571 ± 2 and 1584 ± 3 cm−1, which may be attributed to the resonance enhancement of a single chirality excitation in the innermost tubes and all constituent tubes of the TGCs, respectively. Results suggest that the splitting of G band can be envisaged as a fingerprint for monochirality of tubular carbon nanomaterials.