The core-shell structured mesoporous silica nanomaterials (MSNs) are experiencing rapid development in many applications such as heterogeneous catalysis, bio-imaging and drug delivery wherein a large pore volume is desirable. We develop a one-pot method for large-scale synthesis of brain-like mesoporous silica nanocomposites based on the reasonable change of the intrinsic nature of the -Si-O-Si...

Maleimide-functionalized polystyrene (PSMA-SiO2/TiO2) hybrid nanocomposites were prepared by sol-gel reaction starting from tratraethoxysilane (TEOS) and titanium isopropoxide in the solution of polystyrene maleimide in 1,4-dioxane. The hybrid films were obtained by the hydrolysis and polycondensation of TEOS and titanium isopropoxide in maleimide-functionalized polystyrene solution followed by...

An octadecyl-functionalized solid-phase microextraction (SPME) fiber was prepared by sol-gel technology with an anodized Ti wire as the substrate and dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (C(18)-TMS) and tetraethoxysilane (TEOS) as sol-gel precursors. The anodized Ti wire has high mechanical strength and has numerous titanol groups on its surface for sol-gel reactions, c...

The first route is frequently used as the organic matrix is synthesized from free radical polymerization. In this work, we focused our studies on the other routes as the objective was to prepare hybrid materials from non-fonctionalised polyamidine and from functionalised polyamidine. The inorganic content, i.e. SiO2 equivalent content, of O/I materials was increased by adding tetraethoxysilane ...

The process of synthesizing silica nanopowder by the gas phase thermal oxidation of tetraethylorthosilicate (TEOS) in a diffusion flame reactor was simulated using a commercial computational fluid dynamic (CFD) code. The fuel combustion process and silica particle formation and growth in the flame are modeled. The temperature, velocity and particle size distribution (PSD) fields inside the reac...

The electrical properties of MIS structures with silicon oxynitride films, deposited at 200 C in a RF-plasma CVD reactor using Si(OC2H5)4 (TEOS) as a precursor and nitrogen as the gas ambient have been studied. The analysis of the capacitance-voltage and current–voltage characteristics has shown that a larger DC bias yields larger densities of dielectric charge and interface traps in the growin...

Microporous silica materials with a controlled pore size and a narrow pore size distribution have been prepared by sol-gel processing using an organic-templating approach. Microporous networks were formed by pyrolytic removal of organic ligands (methacryloxypropyl groups) from organic/inorganic hybrid materials synthesized by copolymerization of 3-methacryloxypropylsilane (MPS) and tetraethoxys...

Arvioitu teos: Minna Intke-Hernandez: Maahanmuuttajaäitien arjen kielitarinat. Etnografinen tutkimus kieliyhteisöön sosiaalistumisesta.Kasvatustieteellisiä tutkimuksia103. Helsinki: Helsingin yliopisto 2020. Johdanto 112 s. + 4 artikkelia. isbn 978-951-51-6837-5. Johdanto-osa saatavillaverkossa osoitteessa http://urn.fi/URN:ISBN:978-951-51-6838-2.