Materials Literature
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Recombinant human-like collagen (RHLC) was blended with fibroin to prepare a novel biocompatible film as a scaffold material for hepatic tissue engineering applications. Solution blending was used to incorporate RHLC with silk fibroin to enhance the blend films biocompatibility and hydrophilicity while maintaining ela…
We engineer colloidal quantum dot nanocrystals through the choice of biomolecular ligands responsible for nanoparticle nucleation, growth, stabilization, and passivation. We systematically vary the presence of, and thereby elucidate the role of, phosphate groups and a multiplicity of functionalities on the mononucleot…
The spectral shape and observed sonoluminescence emission from Xe bubbles in concentrated sulfuric acid is consistent only with blackbody emission from a spherical surface that fills the bubble. The interior of the observed 7000 K blackbody must be at least 4 times hotter than the emitting surface in order that the eq…
In this paper, BPO 4 and Ba 2+ -doped BPO 4 powder samples were prepared by the sol−gel process using glycerol and poly(ethylene glycol) as additives. The structure and optical properties of the resulting samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emis…
Carbon was synthesized on β‐SiC whiskers by extraction of Si atoms from SiC. In this study, three different elevated temperature extraction methods were used to remove Si atoms from SiC: treatments in either Cl 2 or HCl and vacuum decomposition. In all chlorination experiments and vacuum treatment at 1700°C, carbon pr…
The flame-retardant effects of nano magnesium hydroxide (NMH) and nano hydrotalcite (NLDH) in ethylene-vinyl acetate copolymer (EVA) are studied by using the limited oxygen index (LOI), UL-94 test, cone calorimeter test (CCT), thermogravimetric analysis (TGA), laser Raman spectroscopy (LRS), and scanning electron micr…
A modified approach toward synthesizing colloidal CoFe 2 O 4 nanocrystals, using mixed types of organometallic precursors, is presented and compared to CoFe 2 O 4 nanocrystals that have been produced according to previously reported synthetic techniques. Although the standard characterization techniques, such as elect…
Transport measurements for different electron-doped metal phthalocyanine materials demonstrate the possibility to control their electronic properties through alkali intercalation. In these materials, increasing the potassium concentration results in the formation of a doping-induced metallic state (see Figure and Insi…
We compared the characteristics of dodecanethiolate palladium nanoparticles synthesized by two different techniques, a one-phase method and a two-phase method. From transmission electron microscopy (TEM), we determined that the particle sizes were 46 +/- 10 angstroms and 20 +/- 5 angstroms for the one- and two-phase p…
Abstract Natural fiber composites were designed and optimized to achieve good mechanical properties and resistance to growth of living organisms. Composite materials were prepared from poly(lactic acid) (PLA) with flax fibers, where the flax fibers had been subjected to interstitial polymerization to replace the water…
Statistical descriptors of the X-ray diffraction data set for a macromolecular crystal can be modelled using the information present in the initial diffraction images. Quantitative relationships between the crystal quality, beam apertures, oscillation width, resolution limit, redundancy and the data statistics are pre…
ZnS nanowire arrays have been prepared for the first time by direct-current electrodeposition into the nanopores of porous anodic alumina membranes (AAMs), and the growth mechanism is that metal cations are firstly reduced and then react with elemental S to form ZnS nanowire arrays in the nanopores of AAMs. The nanopo…
Stress-induced grain boundary migration is theoretically described as a new mode of rotational plastic deformation in nanocrystalline materials. We have calculated the strain energy change due to migration of a grain boundary that carries rotational plastic flow. It is shown that, depending on the stress level, the gr…
A novel naphthalimide dimer tethered by a photochromic bisthienylethene bridge was synthesized by the Suzuki coupling method. Reversible, high-degree fluorescence modulation of the naphthalimide chromophore was realized by photoisomerization of the photochromic subunit in polymer matrixes, and two-dimensional recordin…
The applicability of Born’s criterion for the assessment of structural stability of perfect crystals under mechanical loading is examined for the case of face-centered-cubic (fcc) crystals subjected to uniaxial [111] loading. The analysis is based on the results of lattice-statics calculations and isostress molecular-…
In this letter we report the carrier mobilities in an inorganic nanocrystal: conducting polymer composite. The composite material in question (lead sulphide nanocrystals in the conducting polymer poly [2-methoxy-5-(2′-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) was made using a single-pot, surfactant-free synthesi…
The preparation and properties of a series of gold nanoclusters protected by thiolated peptides based on the alpha-aminoisobutyric acid (Aib) unit are described. The peptides were devised to form 0-3 C=O...H-N intramolecular hydrogen bonds, as required by their 3(10)-helical structure. The monolayer-protected clusters…
The RMn2O5 (R=Pr, Nd, Sm, and Eu) oxides showing magnetoelectric (ME) behavior have been prepared in polycrystalline form by a standard citrate route. The lattice parameters, obtained from the powder XRD analysis, follow the rare-earth contraction indicating the trivalent character of the R ions. Cusp-like anomalies i…
By means of muon spin spectroscopy, we have found that K$_{0.49}$CoO$_2$ crystals undergo successive magnetic transitions from a high-T paramagnetic state to a magnetic ordered state below 60 K and then to a second ordered state below 16 K, even though K_{0.49}CoO_2 is metallic at least down to 4 K. An isotropic magne…
We report atomic scale studies of the effect of applied strain and hydrogen environment on the reconstructions of the (105) Si and Ge surfaces. Surface energy calculations for monohydride-terminated (001) and (105) reconstructions reveal that the recently established single-height rebonded model is unstable not only w…