Materials Literature
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Corrosion behavior of Ag in atmospheres containing humidity and ozone (O3), with sodium chloride (NaCl) surface contamination and ultraviolet (UV) illumination, has attracted strong interest recently because of the failure of ASTM B117 testing for Ag. This paper further investigates the effects of these parameters on…
The corrosion behavior of electrolytic copper (>99.5% purity [UNS C11000]), carbon steel (AISI/SAE 1016 [(UNS G10160]), and Type 304 (UNS S30400) stainless steel in neutral tap water was examined by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) using a rotating cylinder electrode…
A two-port beam splitter is presented to obtain the 50/50 output based on the two-layer grating. The previously reported beam splitter grating can work only at the special prescribed incident angle. The deviation of incident angle introduces the effect on the splitting ratio uniformity. The proposed two-layer beam spl…
Unlike man-made composite materials, natural biominerals containing composites usually demonstrate different levels of sophisticated hierarchical structures which are responsible for their mechanical properties and other metabolic functions. However, the complex spatial organizations of the organic-inorganic phases ar…
Bio-nanomaterials are one of the fastest developing sectors of industry and technology. Spider silk, a highly attractive light-weight biomaterial, has high tensile strength and elasticity and is compatible with human tissues, allowing for many areas of application. In comparison to spider silk fibers with diameters of…
The present study reveals the influence of different anodizing electrolytes on the superhydrophobic surface modification of titanium and the resultant corrosion and biofouling resistance. Inspired by the Lotus effect, anodization and low surface energy material coating were used to produce super-hydrophobic titanium i…
Abstract A series of novel adamantane‐based copoly(aryl ether ketone)s ( PAEK‐CF 3 ‐Ad) with low dielectric constants were prepared by post‐amidation of copoly(aryl ether ketone)s containing (3‐trifluoromethyl)phenyl and carboxyl groups with 4‐adamantylaniline. Compared with the preparation of adamantane‐containing po…
Polycrystalline BiFeO3, having a spherical shape with a diameter of about 78 μm, has been synthesized by low-temperature hydrothermal method. The observed Raman and x-ray photo electron spectroscopy (XPS) spectra of the sample show the spectra of typical single-phased BiFeO3, and the x-ray diffractometry (XRD) measure…
Highly luminescent semiconducting AgInS2–ZnS solid solution nanorods are successfully prepared by a facile one-pot solvothermal method. The resulting solid solution nanorods with length of 32 ± 5 nm are formed by fast growth of the AgInS2-rich solid solution head, followed by slow growth of the ZnS-rich solid solution…
Photodiodes, based on PbS colloidal quantum dots (CQD), are realized on both silicon substrates and the replicas of the read-out integrated circuits (ROICs) to demonstrate the first, fully integrated focal plane arrays. Careful optimization of PbS CQD film formation and ligand exchange process, together with optimized…
In a combined experimental and first-principles density functional theory (DFT) study, benzene steam reforming (BSR) over MgAl 2 O 4 -supported Rh and Ir catalysts was investigated. Experimentally, it has been found that both highly dispersed Rh and Ir clusters (1–2 nm) on the spinel (e.g., MgAl 2 O 4 ) support are st…
To clarify the influence of surface steps on the diffusion of adsorbed oxygen atoms on Pt, we have carried out density functional calculations of the adsorption of atomic oxygen on a Pt(211) stepped surface and the diffusion barriers between the adsorbed states. Comparison with Pt(111) and Pt(100) flat surfaces reveal…
Abstract The photoconductive properties of a uniform ultrathin multilayer film composed of alternating poly( p ‐phenylene vinylene) (PPV) and reduced graphene oxide (RGO) layers, fabricated on a poly(ethylene terephthalate) (PET) sheet are reported. The assembly of the two electron‐rich layer components on the tempera…
We demonstrated a novel core–shell microsphere (CSM) fabricated from coassembly of anthracene-ended hyperbranched poly(ether amine) (hPEA-AN) and anthracene containing polyhedral oligomer silsesquioxane (POSS-AN). The obtained CSMs are cross-linked through photodimerization of anthracene and possess the well-defined c…
Over the last decade, nanocrystalline and ultra-fine grained (UFG) materials with grain size less than 1 μm have aroused considerable interest due to their superior mechanical properties compared to conventionally grained materials. In this work Ti–Nb microalloy steel was processed by the severe plastic deformation (S…
Hi ho silver lining: Dealloyed nanoporous silver showed high activity and selectivity for the partial oxidation of MeOH into formaldehyde and of several primary and secondary aliphatic alcohols into their corresponding aldehydes or ketones.
Poröse N-dotierte Kohlenstoffmaterialien (HTC-Kohlenstoff mit PILs) aus kugelförmigen Nanopartikeln und solche mit eingebetteten Au/Pd-Kern/Schale-Nanopartikeln (Au/Pd@N-Kohlenstoff) wurden synthetisiert. Sie sind erhältlich durch hydrothermale Verkohlung von Zuckern (160–200 °C) in Gegenwart polymerer ionischer Flüss…
The kinetics of the CO oxidation over a Pt(111) thin film was studied in situ under CO and O 2 pressures in the millibar range, using infrared spectroscopy and in situ surface X-ray diffraction to follow the actual structural and chemical nature of the catalyst surface. The total pressure of the gas mixture and the co…
Electron diffraction offers advantages over X-ray based methods for crystal structure determination because it can be applied to sub-micron sized crystallites, and picogram quantities of material. For molecular organic species, however, crystal structure determination with electron diffraction is hindered by rapid cry…
We show that the addition of solid particles to droplet–matrix blends of immiscible polymers induces massive changes in the rheology and the flow-induced structure even at loadings as low as 0.1 vol. %. Experiments were conducted using blends of polyethylene oxide (PEO, dispersed phase), polyisobutylene (PIB, continuo…