کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9566904 1503709 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The electronic properties of carbon nanotubes studied by high resolution photoemission spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
The electronic properties of carbon nanotubes studied by high resolution photoemission spectroscopy
چکیده انگلیسی
High resolution photoemission spectroscopy was used to follow the modification of the electronic properties of single wall carbon nanotubes determined by the interaction with adsorbed electron donor and acceptor species. Valence band, C1s and adsorbate core level spectra were monitored to reveal the adsorption and to follow the Fermi level shift induced by the charge exchange between C lattice and dopants. In the presence of nitrogen dioxide, a considerable charge withdrawal from C atoms takes place, which is revealed by the binding energy shift of the C1s peak. On the contrary, adsorbed H2O does not appear to interact with nanotubes. For Li doping, the occurrence of an efficient electron injection into the tube structure is demonstrated by the evidence of Li ionisation, by the enhancement of the density of states near the Fermi level and by the partial conduction band filling, which originates a rigid shift of all C spectral structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 248, Issues 1–4, 30 July 2005, Pages 8-13
نویسندگان
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