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    Analysis of Charge Transfer for in Situ Li Intercalated Carbon Nanotubes

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    Type
    Article
    Authors
    Rana, Kuldeep
    Kucukayan-Dogu, Gokce
    Sen, H. Sener
    Boothroyd, Chris
    Gulseren, Oguz
    Bengu, Erman
    Date
    2012-05-15
    Online Publication Date
    2012-05-15
    Print Publication Date
    2012-05-24
    Permanent link to this record
    http://hdl.handle.net/10754/597554
    
    Metadata
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    Abstract
    Vertically aligned carbon nanotube (VA-CNT) arrays have been synthesized with lithium (Li) intercalation through an alcohol-catalyzed chemical vapor deposition technique by using a Li-containing catalyst. Scanning electron microscopy images display that synthesized carbon nanotubes (CNTs) are dense and vertically aligned. The effect of the Li-containing catalyst on VA-CNTs has been studied by using Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron energy loss spectroscopy (EELS). XPS results show the change in binding energy of Li 1s and C 1s peaks, which indicates that Li is inserted in VA-CNTs during growth. Analysis of Raman spectra reveals that the G-band profile of CNTs synthesized with the Li-containing catalyst is shifted, suggesting an electronic interaction between Li and neighboring C atoms of the CNTs. The EELS spectra of the C K edge and Li K edge from CNTs also confirmed that Li is inserted into CNTs during synthesis. We have performed ab inito calculations based on density functional theory for a further understanding of the structural and electronic properties of Li intercalated CNTs, especially addressing the controversial charge-transfer state between Li and C. © 2012 American Chemical Society.
    Citation
    Rana K, Kucukayan-Dogu G, Sen HS, Boothroyd C, Gulseren O, et al. (2012) Analysis of Charge Transfer for in Situ Li Intercalated Carbon Nanotubes. The Journal of Physical Chemistry C 116: 11364–11369. Available: http://dx.doi.org/10.1021/jp301369u.
    Sponsors
    We thank Dr. Li Kun at KAUST for the use of TEM facilities and the Scientific and Technological Research Council of Turkey (Tubitak) for financial support.
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry C
    DOI
    10.1021/jp301369u
    ae974a485f413a2113503eed53cd6c53
    10.1021/jp301369u
    Scopus Count
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