Metallocene filled single-walled carbon nanotubes (SWCNTs) are important for air pollution control. Metallocenes are chemical compounds that are sensitive to air pollutions, and they oxidize, and reduct in dirty air with pullutants. Metallocene filled SWCNTs are useful test systems for the air pollutions. The filled SWCNTs are synthesized by the gas and liquid methods, and it is easy to prove the filling. First method includes the filling with gasesous metallocene in glass ampoule in vacuum at low temperature below the decompositon of metallocene. Second method includes the filling in the solution, which should follow by the cleaning from the excess molecules in vacuum. The investigation of electronic properties of metallocene filled SWCNTs is needed for the air pollution studies. The investigations are done with Raman spectroscopy, near edge X-ray absorption fine structure spectroscopy, optical absorption spectroscopy, and photoemission spectroscopy. The filled SWCNTs show the n-doping of carbon nanotubes. Various metallocenes were filled inside SWCNTs, such as ferrocene, nickelocene, cobaltocene, cerocene. Here, I demonstrate the electronic properties of metallocene filled SWCNTs [1-4].

[1] M.V. Kharlamova et al., Physica Status Solidi B, 2013.

[2] M.V. Kharlamova et al., Physica Status Solidi B, 2015.

[3] M.V. Kharlamova et al., Physica Status Solidi B, 2016.

[4] M.V. Kharlamova, Progress in Materials Science, 2016.