Materials Literature
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An amphiphilic peptide dendron-jacketed dextran polymer was designed and synthesized via click chemistry. The biocompatible peptide dendron-jacketed dextran could self-assemble into nanoparticles and serve as drug carriers in aqueous media.
A compositionally new osmium oxide, Ca2InOsO6, which crystallizes in a double-perovskite structure, was synthesized through a high-pressure and high-temperature synthesis method. The crystal structure of Ca2InOsO6 was determined by X-ray diffraction to be monoclinic with the space group P21/n, like other double-perovs…
Phosphonic and carboxylic fluorescent nanoparticles have been fabricated by direct reprecipitation in water. Their fluorescence properties strongly differ from those of the corresponding esters where strong H-bonding formation is prohibited. Comparative experiments between the two acid derivatives, differing only in t…
An anionic conjugated polyelectrolyte based on polydiphenylacetylene showed a significant fluorescence turn-on response to positively-charged proteins through a conformational relaxation of its intramolecular stack structure.
Strength and ductility data for Q235A steel from 20 oC to 950 oC was obtained from a series of experimental tests. The stress rate sensitivity was studied by conducting Split-Hopkinson Tension Bar (SHTB) test and uniaxial tension test on smooth cylindrical specimens while the influence of stress triaxiality on ductili…
Yb-Bi co-doped phosphate glasses were prepared by a melt-quenching technique. The effects of B2O3, Al2O3 and Y2O3 addition on the absorption spectra, broadband emission intensity and measured fluorescence lifetime were investigated. The results have shown that a certain amount of B2O3, Al2O3 and Y2O3 addition was high…
Potential (non-nuclear) energy stored in reactor facility coolant is a crucial factor determining the NPP safety/hazard characteristics as it is inherent property of the material and cannot be changed. Enhancing safety of the NPP with traditional type reactor facilities, in which potential energy is stored in large qu…
The spin crossover behavior of the two [Fe(mtz)6](2+) complexes occupying different lattice sites in Fe(mtz)6(BF4)2 is addressed by combining quantum chemical calculations with a careful analysis of the crystal structure. It is first established from the calculations that the energy difference between high spin and lo…
Nanocarrier-based cancer chemotherapeutics are thought to increase therapeutic efficiency and reduce the side effects of associated chemotherapeutic agents by altering the agents' pharmacokinetics and tissue distribution following intravenous administration. In spite of these favorable properties, nanocarrier-based ca…
Au@Pd@Cu core–shell nanorods (NRs) were prepared using Au@Pd NRs as seeds. The resultant crystal structures were characterized using transmission electron microscopic (TEM), TEM-energy dispersed X-ray spectroscopic (EDS), and X-ray diffraction (XRD) measurements. Au@Pd seeds were prepared by reducing H2PdCl4 with cety…
Barium titanate (BaTiO3, BT) ceramics with various grain sizes were prepared by hot isostatic pressing (HIP) and post-annealing. The dielectric and piezoelectric properties were evaluated. Grain growth was suppressed in the ceramics prepared by HIP. The average grain sizes of the ceramics were controlled by changing t…
We study the impact of the Nd-doping on the grain formation, the crystal structure, and the fluorescence of the Yttrium Aluminum Garnet (YAG). The results show that Nd-doping leads to the YAG lattice expansion and distortion, and hence to an increase in defect concentration. This is attributed to substitution of large…
We have utilized the lattice mismatch between two adjacent nanocrystals in polycrystalline BFO ceramics to introduce a layer of highly strained BFO phase by taking advantage of crystal growth course. Therefore, a spin-valve like structure has been fabricated that consists of ferromagnetic phase (highly strained BFO ph…
The synthesis of atomic metal (gold and nickel) clusters by pulsed galvanostatic electrodeposition on nanoporous alumina is presented. The method allows the production of clusters with an average diameter of 0.7 nm for gold and 1.1 nm for nickel, while the size can be controlled through the current density applied. Th…
Solar cells with 3C‐SiC nanoparticles embedded in the Si were investigated by plasma‐enhanced chemical vapor deposition. Several sizes of SiC nanoparticles were used as the intermediate layer for the solar cell. The Si thin films showed the formation of micro‐ and nanocrystallites on the SiC nanoparticle sites, which…
Behavior of matter at the nanoscale differs from that of the bulk due to confinement and surface effects. Here, we report a direct observation of liquid-like behavior of a single grain boundary formed by cold-welding Au nanoparticles, 40 nm in size, by mechanical manipulation in situ TEM. The grain boundary rotates al…
Isothermal crystallization processes in the temperature range from 110 to 140 °C were studied by using polarizing optical microscopy (POM) for poly(L-lactide) (PLLA) film samples with and without confinement conditions. The PLLA film samples were prepared by melt pressing between two cover glasses to provide the surfa…
The ability to exert active control over the kinetic processes associated with dispersion stability is appealing for applications ranging from precision sensing to materials processing. Here, we demonstrate programmable aggregation dynamics using a system of gold nanoparticles sterically stabilized with a thermorespon…
High concentration (5 wt %) of ZnO1−xSx nanosphere (NS) has been dispersed in the ferroelectric liquid crystal (FLC) to analyze the effect of high dopant concentration in the FLC matrix. The FLC molecules actively interact with the NS. The presence of NS enhances the photoluminescence of the pure FLC material due to t…
Yb 3+ singly doped and Yb 3+ /Al 3+ co-doped high silica glass samples are prepared, and their luminescent properties are investigated. Al 3+ is considered as a beneficial activator for Yb 3+ -doped glass. However, the experimental result shows that the addition of Al 3+ results in the transformation from Yb 3+ to Yb…