Figure 1.

a XRD patterns of Na7(H3O)Nb6O19·14H2O nanobelts. The peak corresponding to remnant Nb is marked. b IR spectrum of Na7(H3O)Nb6O19·14H2O precursor.

Wu and Xue Nanoscale Res Lett 2011 6:14   doi:10.1007/s11671-010-9757-0