Sol-gel porous glass

O. Lev, Diagnostic applications of organically doped sol-gel porous glass. Analysis 20, 543—553 (1992). 

Avnir, D Braun, S Lev, 0 Levy, D and Ottolenghi, M. (1994) Organically doped sol-gel porous glasses chemical sensors, enzymatic sensors, electrooptical materials, luminescent materials and photochromic materials, in Sol-Gel Optics Processing and Applications... 

M. L. Ferrer and F. del Monte, Study of the Adsorption Process of Sulforhodamine B on the Internal Surface of Porous Sol-Gel Silica Glasses through Fluorescence Means, Langmuir, 2003, 19, 650. 

Fig. 20. The spin-lattice relaxation rates of liquid pyridine deuterated in ortho and para positions as a function of the pore radius reciprocal in porous sol-gel silica glasses (50).

Another highly efficient process involves the immobilization of three enzymes in a silica sol-gel 309. Since the process consists of a sequential reaction of in situ generated substrates with three different enzymes, the confinement of the system in a porous matrix resulted in an enhanced probability of the reactions as shown in Fig. 15-57 due to an overall increase in local concentration of reactants within the nanopores of the sol-gel processed glasses 309. ... 

The approach of making porous composites of P(3HB-co-3HV) with sol-gel bioactive glass (SGBG) and calcium phosphate-loaded collagen (CaP-Gelfix) foams have been tried for bone-tissue engineering. It was found to be useful since it showed formation of a HA layer on the surface of P(3HB-co-3HV)/SGBG... 

Ferrer M.L., del Monte F. Study of the adsorption process of sulforhodamine B on the internal surface of porous sol-gel silica glasses through fluorescence means. Langmuir 2003 19 650-653 Fujii T., Mabuchi T., Mitsui I. Fluorescence spectra of naphthols during sol to gel transition of tetraethoxy silane by HCl catalyst. Chem. Phys. Lett. 1990 168 5-8 Fujii T., Mabuchi T., Kitamura H., Kawauchi O., Negishi N., Anpo M. Fluorescence spectra of 1-naphthol during the sol-gel process of a mixed aluminum-silicon alkoxide (Si Al = 94 6). Bull. Chem. Soc. Jpn. 1992 65 720-727... 

S.3.2 Sol-Gel Encapsulation of Reactive Species Another new and attractive route for tailoring electrode surfaces involves the low-temperature encapsulation of recognition species within sol-gel films (41,42). Such ceramic films are prepared by the hydrolysis of an alkoxide precursor such as, Si(OCH3)4 under acidic or basic condensation, followed by polycondensation of the hydroxylated monomer to form a three-dimensional interconnected porous network. The resulting porous glass-like material can physically retain the desired modifier but permits its interaction with the analyte that diffuses into the matrix. Besides their ability to entrap the modifier, sol-gel processes offer tunability of the physical characteristics... 

Encapsulation of proteins in transparent porous silicate-glasses prepared by the sol-gel method. Science, 255, 1113-1115. 

Silica sol-gel glasses are porous materials, which means some kind of solid material that has holes in it. These holes are also called pores. To call a material a porous material, there is usually some kind of implicit assumption of homogenization and length scale. The holes must be smaller enough, compared to the typical size of the piece of material that is considered, so that it is reasonable to consider the material as a mixture of solid framework and pores28. 

British scientists immobilized53 in a porous sol-gel glass aequorin - the bioluminescent protein found in the jellyfish Aequorea aequorea. The luminescence from this protein is specifically triggered by the presence of calcium ions. The intensity of the luminescence, measured at the peak... 

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