B. Ye et al., Synthesis and electronic properties of potassium fulleride nanowires in a mesoporous niobium oxide host, ADVAN MATER, 13(1), 2001, pp. 29
K3C60 has been quantum-confined inside the pores of mesoporous niobium oxid
e. Examination of the electronic properties of this new family of 1D potass
ium (shown in pink in the Figure) fullerides shows that, contrary to previo
us experimental data on bulk K3C60 (but consistent with theoretical calcula
tions), these nanowires are insulating at room temperature and do not under
go a superconducting transition at liquid-helium temperature.