نتایج جستجو برای: mesostructure
تعداد نتایج: 340 فیلتر نتایج به سال:
A simple one-pot synthesis process for functionalized mesostructured silica nanoparticles (MSNP) is reported. The novel demonstrated the possibility to achieve MSNP with a surface area up 501 m2.g−1 using phosphonate based nonsilane precursor such as N, N´-bis[4,6-bis(diethylphosphono)-1,3,5-triazin-yl]-1,2-diaminoethane (ED). obtained by 20 mol% of ED achieved 80 and increasing content 30 resu...
A series of calculations has been conducted to study the high-speed interaction space debris (SD) particles with screens finite thickness. For first time, taking into account fracture effects, a numerical solution obtained for problem high-velocity between SD and volumetrically reinforced penetrating composite screen. The were performed using REACTOR 3D software package in three-dimensional set...
Periodic mesoporous hydridosilica, PMHS, is shown for the first time to function as both a host and a mild reducing agent toward noble metal ions. In this archetypical study, PMHS microspheres react with aqueous Ag(I) solutions to form Ag(0) nanoparticles housed in different pore locations of the mesostructure. The dominant reductive nucleation and growth process involves SiH groups located wit...
In this study, novel hyaluronic acid-pH stimuli-responsive lipid membrane mesoporous silica nanoparticles (HA-PL-MSNs) were designed and assembled, with the chemotherapeutic agent doxorubicin (DOX) as the model drug. HA-PL-MSNs exhibited a well-defined mesostructure covered by lipid bilayer and particle size of ~150 nm. The drug loading capacity was up to ~18.2%. DOX release could be effectivel...
The co-condensation of functional alkoxysilanes with tetraethoxysilane in the presence of a structure directing agent under sol-gel process chemistry is a common way to access functional organosilica with an ordered mesostructure. In this report, bulky silylated fatty acid methyl esters were used both as co-templating bio-molecules and functionalizing agents in the process of supra-molecular si...
Selective thermal emission in a useful range of energies from a material operating at high temperatures is required for effective solar thermophotovoltaic energy conversion. Three-dimensional metallic photonic crystals can exhibit spectral emissivity that is modified compared with the emissivity of unstructured metals, resulting in an emission spectrum useful for solar thermophotovoltaics. Howe...
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