Figure 7
A schematic representation of how the triangular envelops of VO x sheets form a a hexagonally packed layer of V2O5/VO2 with some QDs of same material scattered randomly on it b the layer folds along zigzag AE, armchair EC and armchair AC of triangle AEC c the folding of triangular flaps ABC, CDE and EDF progresses until d the triangular envelop AEC is formed. The enveloped spherical particles are either e multi-walled V2O5/VO2 fullerenes or f single walled V2O5/VO2 fullerenes