“…Cubic colloidal particles (z 20-50 nm) composed of MgO, CdO, PbSe, PbTe, and aFe 2 O 3 have been synthesized, 290,291 Cubic-shaped platinum particles were prepared by El-Sayed et al 292 Hexahedron-shaped particles of WO 3 , InS 3 , and SnO 2 were also obtained. 294 Octahedron-shaped particles of Fe 3 (SO 4 ) 2 (OH) 5 .2H 2 O was obtained by heating acidic solutions of ferric sulfate. 294 Octahedron-shaped particles of Fe 3 (SO 4 ) 2 (OH) 5 .2H 2 O was obtained by heating acidic solutions of ferric sulfate.…”