ISSN:
1661-9897
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The identification of features in the Local Density of States (LDOS) of carbon nanotubes(CNTs) obtained by Scanning Tunneling Spectroscopy (STS) is of great importance in order tounderstand their properties. In this work, Single- and Multi-Wall Carbon Nanotubes are comparedwith Multi-Wall CNTs filled with tin nanowires (Sn@CNTs) in order to investigate the effect onmorphological and electronic properties of the CNTs metallic filling. The LDOS of CNTs, togetherwith topology changes, is investigated by using spatially resolved STM/STS at room temperatureand in air and compared to the LDOS of highly oriented pyrolitic graphite (HOPG). The LDOS ofCNTs is dominated from different electronic states filling the C 2pσ-2pσ* band gap. Theappearance of those states is linked to the diameter and the defects of the CNTs. In fact, Snnanowiresencapsulation induces changes in the structure of the CNTs and the appearance ofelectronic states in the LDOS inside the band gap. A more extensive description of the samples isobtained depicting the morphological features and the vibrational structure on wider areas usingScanning Electron Microscopy (SEM) and Raman spectroscopy, respectively
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/43/transtech_doi~10.4028%252Fwww.scientific.net%252FJNanoR.3.1.pdf
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