Confined adamantane molecules assembled to one dimension in carbon nanotubes
✍ Scribed by Mingguang Yao; Patrik Stenmark; Edy Abou-Hamad; Florian Nitze; Jian Qin; Christophe Goze-Bac; Thomas Wågberg
- Book ID
- 104009429
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 784 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
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.