Spectroscopic Characterization of N-Doped Single-Walled Carbon Nanotube Strands: An X-ray Photoelectron Spectroscopy and Raman Study
Spectroscopic Characterization of N-Doped Single-Walled Carbon Nanotube Strands: An X-ray Photoelectron Spectroscopy and Raman Study
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DOI：
10.1166/jnn.2010.2009
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发表时间：
2010-06-01
影响因子：
--
通讯作者：
Terrones, M.
中科院分区：
文献类型：
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作者：
Elias, A. L.;Ayala, P.;Terrones, M.
我们详细研究了氮掺杂单壁碳纳米管(SWCNTs)中的碳、氮键环境。以苯甲胺-乙醇-二茂铁为原料，采用气溶胶辅助化学气相沉积法制备了N掺杂单壁碳纳米管。所研究的样品是在不同浓度的溶液中制备的，通过X射线光电子能谱(XPS)测定，其最大浓度约为N的0.3%。总体而言，我们观察到取代氮和类吡啶键合氮的比例随前驱体组成的不同而不同。此外，我们还观察到C-N键的类sp(2)取代构型不超过N原子掺入总量的50%。此外，我们还用拉曼光谱和电子显微镜对这些样品进行了表征。
We have studied in detail the carbon and nitrogen bonding environments in nitrogen-doped single-walled carbon nanotubes (SWCNTs). The samples consisting of long strands of N-doped SWCNTs were synthesized using an aerosol assisted chemical vapor deposition method involving benzylamine-ethanol-ferrocene solutions. The studied samples were produced using different benzylamine concentrations in the solutions, and exhibited a maximum concentration of ca. 0.3%at of N, determined by X-ray photoelectron spectroscopy (XPS). In general, we observed that the ratio between substitutional nitrogen and the pyridine-like bonded nitrogen varied upon the precursor composition. Moreover, we have observed that the sp(2)-like substitutional configuration of the C-N bond does not exceed the 50% of the total N atomic incorporation. In addition, we have characterized all these samples using Raman spectroscopy and electron microscopy.