Confined adamantane molecules assembled to one dimension in carbon nanotubes
2011 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 49, no 4, 1159-1166 p.Article in journal (Refereed) Published
We have encapsulated adamantane (C10H16) in single- and multi-walled carbon nanotubes. Adamantane is a high symmetry cage like molecule with point group symmetry T-d and can be considered as a hydrogen-terminated diamond fragment. We confirmed and identified the successful filling by high resolution transmission electron microscopy, C-13 nuclear magnetic resonance, infrared and Raman spectroscopy. C-13 nuclear magnetic resonance of the adamantane filled nanotubes reveals that the adamantane molecules stop rotating after encapsulation. A blue-shift of the Raman active radial breathing modes of the carbon nanotubes supports this and suggests a significant interaction between encapsulated adamantane molecules and the single wall nanotubes. The encapsulated adamantane molecules exhibit red shifted infrared C-H vibration modes which we assign to a slight elongation of the C-H bonds. We observe both a nanotube diameter dependence of the adamantane filling ratio and a release rate of adamantane from the CNTs that depends on the CNT diameters.
Place, publisher, year, edition, pages
2011. Vol. 49, no 4, 1159-1166 p.
RAMAN-SCATTERING, SINGLE, C-60, ENCAPSULATION, FULLERENES, PRESSURE, PEAPODS, CHAINS
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-31360DOI: 10.1016/j.carbon.2010.11.031ISI: 000287055200014ScopusID: 2-s2.0-78751569810OAI: oai:DiVA.org:kth-31360DiVA: diva2:404346
QC 201103162011-03-162011-03-142011-03-16Bibliographically approved