Nanoparticle/microparticle-based drug delivery systems for systemic (i.e., intravenous) applications have significant advantages over their nonformulated and free drug counterparts. For example, nanoparticle systems are capable of delivering therapeutics and treating areas of the body that other delivery systems cannot reach. As such, nanoparticle drug delivery and imaging systems are one of th...

Plasmonic metal Ag nanoparticles (AgNPs) on TiO2 thin films (AgNPs/TiO2) are a kind of excellent photocatalyst of high efficiency under visible light, and thus draw great interest nowadays. Further improvement of their photocatalytic activity (PA) is difficult but is of high importance for their applications. In this paper, oxygen plasma was taken to partially oxidize AgNPs deposited on the sur...

Copper (I) and silver (I) oxides crystallize with the same structure, and both show a wide range of negative thermal expansion (NTE): Cu2O contracts with temperature up to about 200K and then expands, while Ag2O has a NTE up to its decomposition temperature at about 450K. Here we report a careful temperature-dependent pair distribution function (PDF) analysis that showed that copper oxide, at a...

In this study, amorphous (Na2O)x(CaO)0.50- x(P2O5)0.50·yH2O (where x = ~0.15 and y = ~3) samples were prepared by a coacervate method. Thermal analysis showed that two types of water molecules were present in the coacervate structures: one type loosely bound and the other part of the phosphate structure. Structural studies using Fourier transform infrared spectroscopy (FTIR) and X-ray total dif...

For the first time, in the present study, a new approach of using the color properties of acid red 18 decolourization behavior by synthetized nano photocatalytic TiO2-Ag2O. In this manner two color system (CIE L*a*b* and CIE L*C*h°) used to calculate the color properties (lightness, Chroma and hue) of samples during the decomposition process. MATLAB software was used to transfer absorbance data...

Bentonite is a preferred buffer and backfill material for deep geological disposal of high-level nuclear waste (HLW). Bentonite does not retain anions by virtue of its negatively charged basal surface. Imparting anion retention ability to bentonite is important to enable the expansive clay to retain long-lived (129)I (iodine-129; half-life = 16 million years) species that may escape from the HL...

We report a simple approach to the fabrication of hierarchical nanoparticle arrays and film patterns using a novel combination of colloidal lithography (CL), two-step self-assembly, and reactive-ion etching (RIE). In this approach, a uniform nanoparticle film (∼15-50 nm particle diameter) is first deposited on a substrate. Then, larger (several hundred to thousands of nanometers diameter) micro...

The reaction of meta- and para-bromomethylene-azobenzenes with 1-methyl-imidazole yields the respective meta-/para-functionalized azobenzenes tagged with an imidazolium group. Similar reactions of ortho- and para-bromo-azobenzene with imidazole and successive quaternation with benzylbromide give the analogues, with an imidazolium group in ortho/para substituted azobenzenes. With the exception o...

The ESR-spin stabilization approach has been employed to detect and characterize o-semiquinone radicals from the oxidation of epinephrine and related materials (norepinephrine, 3,4-dihydroxynorephedrine, isoproterenol, and adrenalone) in aqueous solutions. Semiquinones were generated by various oxidative procedures--enzymatic oxidation (with horseradish peroxidase/H2O2), chemical oxidation (wit...

Silver scandium oxide AgScO2 has been obtained from Ag2O and Sc2O3 by solid-state reaction at elevated temperature and under high oxygen pressure in stainless-steel autoclaves. AgScO2 was obtained in the 3R Delafossite-type structure, R3̄m, with a = 3.21092(2), c = 18.5398(1) Å and Z = 3, containing virtually no admixtures of the 2H polytype. The fully ordered structure was solved by high-resolu...