Nitrogen鈥揝ilicon Heterodoping of Carbon Nanotubes
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- 作者：Martha Audiffred ; Ana Laura El铆as ; Humberto R. Guti茅rrez ; Florentino L贸pez-Ur铆as ; Humberto Terrones ; Gabriel Merino ; Mauricio Terrones.
- 刊名：The Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：April 25, 2013
- 年：2013
- 卷：117
- 期：16
- 页码：8481-8490
- 全文大小：728K
- 年卷期：v.117,no.16(April 25, 2013)
- ISSN：1932-7455
文摘
Si/O/N-doped single-walled carbon nanotubes (SWNTs) are synthesized using aerosol-assisted chemical vapor deposition (AACVD). The samples are characterized by Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), energy-dispersive X-ray spectroscopy (EDS), Auger electron spectroscopy (AES), and X-ray photoelectron spectroscopy (XPS). HRTEM and Raman spectroscopy studies indicate that doping plays a crucial role in the generation of stable small diameter SWNTs. In order to elucidate the role of the heterodoping (Si/N, O/N, and Si/O) on the electronic properties and stability of SWNTs, density functional theory (DFT) computations on semiconductor (10,0), semimetallic (9,0), and metallic (5,5) SWNTs are performed. It is found that in the heterodoped SWNTs substitutional nitrogen makes the inclusion of Si and O atoms more energetically favorable within the carbon lattice. Heterodoping with Si/O/N may have an important impact in the chemistry of SWNTs as they could be used for anchoring polymer chains, clusters, molecules, etc., thus leading to advanced composites and sensors.