01498nas a2200217   4500008004100000022001400041245006500055210006400120260011000184300001400294490000700308520073800315100001801053700001701071700002101088700002101109700001501130700001701145700001901162856009901181       2005                        eng d  a0959-942800aFungus-mediated biosynthesis of silica and titania particles0 aFungusmediated biosynthesis of silica and titania particles  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a2583-25890 v153 a<p>The synthesis of inorganic materials by biological systems is characterized by processes that occur at close to ambient temperatures, pressures and neutral pH. This is exemplified by biosilicification in marine organisms such as diatoms while laboratory-based synthesis of silica involves extreme temperature and pH conditions. We show here that silica and titania particles may be produced by challenging the fungus Fusarium oxysporum with aqueous anionic complexes SiF62- and TiF62- respectively. Extra-cellular protein-mediated hydrolysis of the anionic complexes results in the facile room temperature synthesis of crystalline titania particles while calcination at 300 degrees C is required for crystallization of silica.</p>1 aBansal, Vipul1 aRautaray, D.1 aBharde, Atul, A.1 aAhire, Kedar, C.1 aSanyal, A.1 aAhmad, Absar1 aSastry, Murali  uhttps://library.ncl.res.in/content/fungus-mediated-biosynthesis-silica-and-titania-particles-0