Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Dicumyl peroxide (DCP) vulcanized poly(butadiene‐ co ‐acrylonitrile)‐polyaniline dodecylbenzenesulfonate [NBR‐PAni.DBSA] blends were successfully prepared by using the practical thermomechanical mixing method. The effect of alignment of PAni.DBSA particles on the mechanical and electrical properties of vulcan…
Abstract High refractive index polymer films have been extensively investigated because of their wide application potentials. We now designed thiophene‐containing polystyrene as colorless and transparent high‐refractive‐index thin film. The copolystyrenes were synthesized by general radical polymerization with control…
Graphene provides many advantages for controlling the electronic structure of adatoms and other adsorbates via gating. Using the projected density of states and charge density obtained from first-principles density-functional periodic supercell calculations, we investigate the possibility of performing ``alchemy'' of…
We present an investigation of optically active near-surface defects in sputtered Al-doped ZnO films using scanning tunneling microscope cathodoluminescence (STM-CL). STM-CL maps suggest that the optically active sites are distributed randomly across the surface and do not correlate with the granular topography. In st…
The photophysical properties are described of silicon nanoparticles protected with a shell of n -butyl chains, and with an asymmetric size distribution with a peak between 2 and 3 nm, and a tail extending up to 7 nm. The excited nanoparticles decay via multiexponential luminescence on a time scale of a few nanoseconds…
Abstract The corrosion resistance of Ti–Mo (5, 10, 15 and 25 wt% molybdenum) alloys in 5–25% sulphuric acid was evaluated. The Ti–Mo alloys offered a better corrosion resistance than commercially pure titanium (CP‐Ti). The higher impedance values, higher phase angle maximum, ability to reach the phase angle maximum at…
H applied magnetic field β dependence of TC in volume λ mean-field exchange parameter K compressibility M magnetization α1 thermal expansion σ reduced magnetization T0 ordering temperature (no volume coupling) T temperature v volume χ magnetic susceptibility v0 volume (no magnetic interaction) N number of spins G Gibb…
A systematic study has been conducted to investigate the polymer matrix properties resulting from the introduction of TiO 2 nanotubes (1–5% by weight) that had been surface-modified with phenyl dichlorophosphate (PDCP), into an epoxy resin. The thermal, mechanical, and combustion properties of the nanocomposites and t…
Ordered vertical silicon nanocones arrays coated with silver nanoparticles (AgNPs@SiNCs) are developed as surface-enhanced Raman scattering (SERS)-active substrate, which features good uniformity and reliable reproducibility of SERS signals. Label-free DNA at low concentrations (10−8 M) could be quantitatively analyze…
Powdered nanocomposite materials composed of SBA-15 mesoporous silica and different types of Au nanoparticles within the mesoporous channel pores (Au/SBA-15) are shown to serve as robust and efficient substrates for surface-enhanced Raman spectroscopy (SERS). Using the Au/SBA-15 samples as SERS substrates and 4-mercap…
Diiminic Schiff bases (DSBs) with a variety of spacers in between the two imine bonds have been prepared from salicylaldehyde and different diamines. Gold and silver nanoparticles (NPs) are photoproduced as stable hydrosol from the respective metal salts in the presence of alkaline DSBs. In solution, the capping capab…
Nowadays, consumers demand for fresh, high‐quality seafood products continues to climb, especially in affluent, developed nations. At the same time, there is increasing attention regarding improved utilization of seafood for human consumption; Atlantic salmon is the main species in Chile aquaculture, and most of the s…
ZnO nanowires were investigated at high pressures of up to 27 GPa in situ in a diamond anvil cell using synchrotron X-ray diffraction. Upon compression, a wurtzite-to-rocksalt phase transformation was observed, but both the onset and the completion pressures of this transformation were enhanced compared with all previ…
We report controllable tuning of the room temperature photoluminescence band of CdSe semiconductor quantum dots embedded in thin films of ferroelectric copolymer of vinylidene fluoride and trifluoroethylene made by Langmuir-Blodgett deposition. The high breakdown strength of the polymer permits the application of elec…
Abstract The microstructure and corrosion behavior of the micro‐arc oxidation (MAO) coatings modified by TiO 2 on AZ91 magnesium alloys were investigated by SEM, EDS, XRD, electrochemical analysis and drop test, respectively. The modified MAO coatings were consisted of not only MgAl 2 O 4 and MgO, which usually could…
Convergent syntheses of polyglycerol hyperbranched polymers containing fluorescent labels (fluorescein or perylene diimide (PDI)) at their core are presented. The hyperbranched polyglycerol (HPG) precursors were synthesized using a one step polymerization reaction wherein the initiator leaves a single reactive group f…
In general, organic capping molecules are applied to passivate the surface of semiconductor nanomaterials to modulate the optical properties of these nanostructures. In this work, two alkylamines ( n -butylamine ( n -BA) and n -hexylamine ( n -HA)) and oleic acid (OA) were used to modify the surface of moderately high…
Propagation of wedge-shaped needle domains in LaAlO3 is driven mechanically and the change of wall shapes is observed. Twin walls remain smooth, whereas the one-dimensional front line of the needle tip shows “wiggles” when propagating through defect fields. The front line becomes highly distorted during approach to, o…
We present the design, fabrication, and performance test of a quasi three-dimensional carpet cloak made of normal dielectric in the microwave regime. Taking advantage of a simple linear coordinate transformation, we design a carpet cloak with homogeneous anisotropic medium and then practically realize the device with…
The new thioantimonates [Ni(aepa) 2 ] 3 Sb 6 S 12 ( 1 ), [Ni(aepa) 2 ] 6 (Sb 3 S 6 ) 2 (SO 4 ) 3 ·2H 2 O ( 2 ), and [Ni(aepa) 2 ]Sb 4 S 7 ( 3 ) (aepa = C 5 H 15 N 3 = N -(aminoethyl)-1,3-propandiamine) were obtained under solvothermal conditions by slightly varying the reaction conditions. In all compounds the [Ni(aep…