Hierarchical Structures: Hierachically Structured Hollow Silica Spheres for High Efficiency Immobilization of Enzymes (Adv. Funct. Mater. 17/2013)

Hollow silica spheres: synthesis and mechanical properties.

Core-shell polystyrene-silica spheres with diameters of 800 nm and 1.9 microm were synthesized by soap-free emulsion and dispersion polymerization of the polystyrene core, respectively. The polystyrene spheres were used as templates for the synthesis of silica shells of tunable thickness employing the Stöber method [Graf et al. Langmuir 2003, 19, 6693]. The polystyrene template was removed by t...

Immobilization of Enzymes on Nanoporous Silica Composites

Title of Dissertation: IMMOBILIZATION OF ENZYMES ON NANOPOROUS SILICA COMPOSITES Allan E. David, Ph.D., 2004 Dissertation Directed By: Associate Professor N.S. Wang, Department of Chemical Engineering Dr. A.J. Yang, ISTN, Inc. In this work, the sol-gel process is used to produce a chemically surface modified gel (CSMG) with a high modification density. Sodium silicate, an inexpensive alternativ...

Materials and Wireless Microfluidic Systems for Electronics Capable of Chemical Dissolution on Demand (Adv. Funct. Mater. 92015)

Synthesis of hierarchical Ag2ZnGeO4 hollow spheres for enhanced photocatalytic property.

An Ag(2)ZnGeO(4) photocatalyst was fabricated by ion-exchange reaction between amorphous Zn(2)GeO(4) suspension and Ag(+) solutions. The Ostwald ripening effect induced the formation of hierarchical hollow spheres. Compared with the reference bulk Ag(2)ZnGeO(4), the hierarchical Ag(2)ZnGeO(4) hollow spheres showed enhanced photocatalytic activity.

Immobilization of folic acid on Eu3+-doped nanoporous silica spheres.

Folic acid (FA) was immobilized on Eu(3+)-doped nanoporous silica spheres (Eu:NPSs) through mediation of the 3-aminopropyltriethoxysilane adlayer. The ordered nanopores of Eu:NPS were preserved by the immobilization. The FA-immobilized Eu:NPSs showed the characteristic photoluminescence peak due to interactions between the FA molecules and Eu(3+) ions, and highly dispersed stability in phosphat...