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Issue 11, 2015
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Selective decoration of isolated carbon nanotubes by potassium evaporation: scanning photoemission microscopy and density functional theory

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Abstract

Site selective doping of aligned carbon nanostructures represents a promising approach for their implementation in actual devices. In the present work we report on alkali metals decoration on low density vertically aligned carbon nanotubes, disclosing the possibility of engineering site selective depositions of potassium atoms on the carbon systems. Photoemission measurements were combined with microscopy demonstrating the effective spatial control of alkali deposition. The changes of electronic structures of locally doped carbon regions were studied by exploiting the ability of the scanning photoemission microscopy technique. From the analysis of experimental data supported by theoretical calculations, we show the tuning of the charge transfer from potassium to carbon atoms belonging to neighboring nanotubes or along the same tube structure.

Graphical abstract: Selective decoration of isolated carbon nanotubes by potassium evaporation: scanning photoemission microscopy and density functional theory

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Supplementary files

Article information


Submitted
30 Oct 2014
Accepted
28 Dec 2014
First published
30 Dec 2014

J. Mater. Chem. C, 2015,3, 2518-2527
Article type
Paper

Selective decoration of isolated carbon nanotubes by potassium evaporation: scanning photoemission microscopy and density functional theory

C. Struzzi, D. Erbahar, M. Scardamaglia, M. Amati, L. Gregoratti, M. J. Lagos, G. Van Tendeloo, R. Snyders, C. Ewels and C. Bittencourt, J. Mater. Chem. C, 2015, 3, 2518
DOI: 10.1039/C4TC02478H

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