Doping with Boron and Nitrogen

Aviram A, Ratner MA (1974) Molecular rectifiers. Chem Phys Lett 29 277-283 Viani L, dos Santos MC (2006) Comparative study of lower fullerenes doped with boron and nitrogen. Solid State Commun 138 498-501... 

Figure 1. CNTs and other nano-sized carbon particles (a) scrolling a graphene sheet (b) closed and opened single-walled CNT (c) double-walled CNT (d) CNT sites doped with boron and nitrogen (e) nanopipettes (f) nanocones and (g) nanorings.

Xie has extended his work on zig-zag carbon nanotubes to investigate the effect of doping with boron or nitrogen on the y-hyperpolarizability, and Xie and Rao have calculated the y-hyperpolarizability for a number of chiral graphene tubules. 

Li, Y., Ma, G., Peng, S., Lu, G., and Li, S. (2008) Boron and nitrogen co-doped titania with enhanced visible-light photocatalytic activity for hydrogen evolution. Applied Surface Science,... 

Applications of CNTs based on their electrical properties strongly depend on the diameter and helicity as well as parity.2 3 Doping of CNTs by boron and nitrogen renders them p-type and retype, respectively. MWNTs and SWNTs doped with nitrogen 4 17 and boron"1 9 have been reported. Boron-doped carbon nanotubes appear to exhibit enhanced electron field emission due to the presence of the boron atom at the nanotube edges.20 2 N-doped CNTs show retype behavior regardless of tube chirality.22... 

Analysis of fullerenes for impurities, especially residual hydrogen has been an important component in the study of the structure and properties of these materials. Revay et al. (2006) determined the amounts of carbon and impurity elements (hydrogen, boron, and nitrogen) in Cgo and C70 fiiUerenes. In a similar vein, recent work by Paul et al. (2009) involved characterization of carbon nanotube materials to determine levels of residual catalyst metals and hydrogen impurities present in commercially available materials. Other recent applications of advanced materials include the study of proton uptake in un-doped and yttrium-doped BaPrOs and compared with that in Gd-doped BaCe03 (Jones et al. 2005). 

---