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8305653 
Journal Article 
Highly stabilized β-carotene in carbon nanotubes 
Yanagi, K; Miyata, Y; Kataura, H 
2006 
Yes 
Advanced Materials
ISSN: 0935-9648
EISSN: 1521-4095 
18 
4 
437-441 
English 
The encapsulation and stability of beta-Carotene in single-walled carbon nanotubes (SWCNT) were investigated. Three types of SWCNTs were prepared by laser vaporization of carbon rods doped with Co/Ni in an Ar atmosphere, high-pressure CO SWCNTs, and purified HiPCo tubes. Beta-carotene was dissolved in hexane and annealed SWCNTs were added to the solution for the encapsulation. The refluxed solution was filtered and washed with tetrahydrofuran (THF) to obtain a sheet of SWCNT paper. The process was repeated three times to remove beta-carotene attached to the tube walls. Raman scattering showed the encapsulation of organic molecules inside the tubes.