NDLI: Single-wall carbon nanotubes and peapods investigated by EPR.

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Single-wall carbon nanotubes and peapods investigated by EPR.

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Single-wall carbon nanotubes and peapods investigated by EPR.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Corzilius, B. Dinse, K-P Hata, K.
Description	Country affiliation: Germany Author Affiliation: Corzilius B ( Physikalische Chemie III, Technische Universität, Darmstadt, Petersenstrasse 20, 64287, Darmstadt, Germany.)
Abstract	Single-wall carbon nanotubes (SWNT) prepared by the 'super growth' method developed recently exhibit electron paramagnetic resonance (EPR) signals, which can be attributed to itinerant spins. EPR results indicate very low defect and catalyst concentrations in this superior material. Under these conditions EPR can be used to study details of charge transport properties over a wide temperature range, although the material is still very 'heterogeneous' with respect to tube diameter and chirality. Non-resonant microwave absorption in the temperature range below 20 K is indicative for the opening of a small gap at the Fermi energy for tubes of metallic character, which is indicative for a transition into a superconducting state. Using SWNT filled partially with an endohedral spin probe like N@C(60), such 'peapods' can be investigated 'from the inside'. Continuous-wave (cw) and pulsed EPR was used to investigate localization dynamics within the tubes or to check for interaction with itinerant electrons. Using SWNT grown by different methods, the dominant influence of tube diameter on fullerene dynamics was revealed by temperature dependent pulsed EPR experiments. These differences can be correlated with the interactions between the endohedral observer spin and spins on the SWNT.
File Format	HTM / HTML
ISSN	14639076
Issue Number	46
Journal	Physical Chemistry Chemical Physics
Volume Number	9
e-ISSN	14639084
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2007-12-14
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Physics Discipline Biophysics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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