Confined adamantane molecules assembled to one dimension in carbon nanotubes

• We have encapsulated adamantane (C 10 H 16 ) 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, 13 C nuclear magnetic resonance, infrared and Raman spectroscopy. 13 C 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.

Ämnesord

Natural Sciences  (hsv)

Physical Sciences  (hsv)

Condensed Matter Physics  (hsv)

Naturvetenskap  (hsv)

Fysik  (hsv)

Den kondenserade materiens fysik  (hsv)

NATURAL SCIENCES  (svep)

Physics  (svep)

Condensed matter physics  (svep)

NATURVETENSKAP  (svep)

Fysik  (svep)

Kondenserade materiens fysik  (svep)

fysik  (umu)

Physics  (umu)

Nyckelord

carbon nanotubes

adamantane

filled carbon nanotubes

spectroscopy

synthesis

carbon nanostructures