title: A novel biological strategy for morphology control of PbWO4 crystals in tomato extract.
abstract: PbWO(4) crystals were readily synthesized by reacting lead oxide (PbO(2)) with sodium tungstate (Na(2)WO(4)·2H(2)O) at room temperature in the presence of tomato extract. Biomolecules such as vitamins, proteins in the extract played both the roles of reductant and template. The size and morphology of the PbWO(4) crystals could be controlled by adjusting the concentration of the reactants. When the concentration ratio of PbO(2) and Na(2)WO(4) was increased, the morphologies of the products varied from spherical to fusiform. Room-temperature fluorescence spectra indicated the products had a slight blue shift compared to the solid structure, which may be due to the structure defects in the crystals. The possible mechanism of PbWO(4) crystal growth in tomato extract was discussed.
authors.affiliation: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China.
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Shen
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Chen
authors.forename: Shikuo
authors.initials: S
authors.lastname: Li
authors.forename: Qingfeng
authors.initials: Q
authors.lastname: Zhang
authors.forename: Anjian
authors.initials: A
authors.lastname: Xie
mesh_terms: D003460:Crystallization; D007854:Lead / Q000737:chemistry* / Q000302:isolation & purification; D018551:Solanum lycopersicum / Q000737:chemistry*; D010316:Particle Size; D010936:Plant Extracts / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D010936:Plant Extracts; D017973:Tungsten Compounds; D007854:Lead