Title
Selective decoration of isolated carbon nanotubes by potassium evaporation : scanning photoemission microscopy and density functional theorySelective decoration of isolated carbon nanotubes by potassium evaporation : scanning photoemission microscopy and density functional theory
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Electron microscopy for materials research (EMAT)
Publication type
article
Publication
Subject
Physics
Source (journal)
Journal of materials chemistry C : materials for optical and electronic devices
Volume/pages
3(2015):11, p. 2518-2527
ISSN
2050-7526
ISI
000350984200011
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
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