Synthesis and Properties of Single-Walled Carbon Nanotubes Filled with Metal Halogenides and Metallocenes

This chapter reviews the current status of the research on the electronic properties of single-walled carbon nanotubes (SWCNTs) filled with metal halogenides and metallocenes and growth kinetics of inner SWCNTs inside metallocene-filled nanotubes. The chapter starts with the description of the peculiarities of the synthesis of metal halogenide-filled SWCNTs, comparison of different filling methods, their advantages, disadvantages, and restrictions. Then, we comprehensively summarize, compare, and critically discuss the recent studies on the electronic properties of metal halogenide-filled SWCNTs. After that, the synthesis methods of metallocene-filled SWCNTs are described and the results of the investigation of the growth kinetics of inner SWCNTs inside the filled nanotubes are summarized. Then, the reports dedicated to the investigation of the electronic properties of metallocene-filled SWCNTs are reviewed. Finally, potentials for future research, development, and application of filled SWCNTs are highlighted. of SWCNTs upon their filling. OAS gives information about structure-dependent optical transitions of nanotubes. Raman spectroscopy allows studying the vibronic properties of SWCNTs. XPS investigates the Fermi level shift and bonding environment in filled SWCNTs.