Host–guest interactions in azafullerene (C59N)-single-wall carbon nanotube (SWCNT) peapod hybrid structures

Abstract

The effect of azafullerene encapsulation on the electronic states of single-wall carbon nanotubes (SWCNTs) is investigated; UV-vis-NIR absorption and photoluminescence spectroscopy shows that the interaction between SWCNTs and the encapsulated azafullerenes is originated from the weak intermolecular forces, which suggests a lack of strong doping effect such as electron transfer between them.

Origin of the n-type transport behavior of azafullerene encapsulated single-walled carbon nanotubes

“…Spectroscopic characterization of azafullerene peapods has also been performed using a sample that was synthesized by vapor-phase filling methods. 13 The results suggest that azafullerene peapods may show p-type FET behavior similar to that of C 60 peapods. It was concluded that the discrepancy between these two reports may be caused by the different methods used to prepare the azafullerene materials.…”

“…Our previous study revealed that a large portion of encapsulated C 59 N tends to form dimers. 13 However, we also observed that isolated C 59 N monomers are stable in SWCNTs. By counting the number of molecules of encapsulated C 59 N, it was found that 84% of C 59 N exists in a dimeric form, while 14% remains in an isolated monomers.…”

“…It was concluded that the discrepancy between these two reports may be caused by the different methods used to prepare the azafullerene materials. 13 The production and spectroscopic characterization of the C 59 N-peapods used here have been described in detail previously. 13 Briefly, azafullerene peapods were synthesized by vapor-phase doping.…”

“…13 The production and spectroscopic characterization of the C 59 N-peapods used here have been described in detail previously. 13 Briefly, azafullerene peapods were synthesized by vapor-phase doping. The average tube diameter of the SWCNTs (Meijo Arc APJ-type) used was 1.4 6 0.2 nm.…”

Electronic Structure and Magnetic Properties of N@C60-SWCNT

“…The wavelength converted from the exited energy levels were estimated to be 1703 nm and 1061 nm, which were closed to experimental results of C 59 N-SWCNT by UV-vis NIR spectra and 2D PL contour maps as shown in Fig. 16 (a) (Iizumi, et. al.…”