2007/01/31 by Ferenc Simon, Simon, Ferenc, Rudolf Pfeiffer +4
Chemistry · Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #Carbon Nanotubes in Composites #FOS: Physical sciences #Fullerene Chemistry and Applications #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0701789
A review with 19 figures, submitted to Curr. Anal. Chem
arxiv created 2007/01/31 · openalex publication_date 2007/01/31 · arxiv updated 2009/12/01 · openalex created_date 2022/08/29 · openalex updated_date 2026/07/28
The hollow inside of single-wall carbon nanotubes (SWCNT) provides a unique degree of freedom to investigate chemical reactions inside this confined environment and to study the tube properties. It is reviewed herein, how encapsulating fullerenes, magnetic fullerenes, 13C isotope enriched fullerenes and organic solvents inside SWCNTs enables to yield unprecedented insight into their electronic, optical, and interfacial properties and to study their growth. Encapsulated C60 fullerenes are transformed to inner tubes by a high temperature annealing. The unique, low defect concentration of inner tubes makes them ideal to study the effect of diameter dependent treatments such as opening and closing of the tubes. The growth of inner tubes is achieved from 13C enriched encapsulated organic solvents, which shows that fullerenes do not have a distinguished role and it opens new perspectives to explore the in-the-tube chemistry. Encapsulation of magnetic fullerenes, such as N@C60 and C59N is demonstrated using ESR. Growth of inner tubes from 13C enriched fullerenes provides a unique isotope engineered heteronuclear system, where the outer tubes contain natural carbon and the inner walls are controllably 13C isotope enriched. The material enables to identify the vibrational modes of inner tubes which otherwise strongly overlap with the outer tube modes. The 13C NMR signal of the material is specific for the small diameter SWCNTs. Temperature and field dependent 13C T1 studies show a uniform metallic-like electronic state for all inner tubes and a low energy, ~3 meV gap is observed that is assigned to a long sought Peierls transition.