the present study deals with the synthesis andfunctionalization of mesoporous silica nanoparticles as drug delivery platforms. sba-15 nanorods with high surface area (1010 m2g-1) were functionalized by post grafting method using 3-mercaptopropyl trimethoxysilane (mpts). the parent and thiol-functionalized sba-15 nanorods were used as nanocarriers for an anticancer drug (gemcitabine). the charac...

The electronic desorption of CO and its readsorption on \aluminum (natural oxide film) was studied and found to be influenced by the adsorption of H2. A theoretical model was developed which fits the experimental data and reliably predicts the adsorption-desorption characteristics at low electron energies (100 300 eV). At higher energies the picture is complicated by the release of subsurface g...

Transition metals in form of small supported particles are frequently used in heterogeneous catalytic reactions. One point of actual interest concerns the reactivity of low co-ordination sites characteristic for particle surface. The non continuous epitaxial layers of Pd and Rh were grown on insulator substrates (Al2O3) by molecular beam epitaxy. The reflection high energy electron diffraction ...

• New collector-based setup measures ESD and SEY also at cryogenic temperatures. Highly Oriented Pyrolytic Graphite served as reference to validate measurement. Isotopically traced 15 N 2 was used commission the low-energy Compared 300 eV, 17 eV electrons do limited conditioning of yields. Cryogenic temperature lowers by 5 up 150 times for H CO respectively. CERN’s Large Hadron Collider cryomag...

Water extractable arabinoxylan (WEAX) aerogels were prepared by extracting the solvent from the alcogels (WEAX hydrogels with an alcohol as the solvent) with carbon dioxide under supercritical conditions. WEAX aerogels were characterized using scanning electron microscopy and adsorption and desorption nitrogen isotherms. The micrographs indicate a heterogeneous porous network structure in WEAX ...

Ti-SBA-15 mesoporous materials were directly synthesized via a hydrothermal process and characterized by using nitrogen adsorption-desorption measurements, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, diffuse reflectance ultraviolet-visible spectroscopy, and infrared ray spectroscopy. The effect of synthesis temperatures on the structure and catalytic effic...

In this work, the desorption of furfural, which is a competitive intermediate during the production of biofuel and valuable aromatic compounds, was studied using pure alumina, as well as alumina impregnated with iron and platinum oxides both individually and in combination, using thermogravimetric analysis (TGA). The bimetallic sample exhibited the lowest desorption percentage for furfural. Hig...

Articles you may be interested in 1,2-Dibromoethane on Cu(100): Bonding structure and transformation to C2H4 The covalent binding and adsorption states of acetonitrile on Si͑100͒ have been investigated using temperature programmed desorption ͑TPD͒, x-ray photoelectron spectroscopy ͑XPS͒, high-resolution electron energy loss spectroscopy ͑HREELS͒, and density function theory ͑DFT͒ calculation. XPS and HRE...