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。
In the framework of solvent diffusion in glassy polymer films, this paper concerns an experimental study of sorption and desorption kinetics for a model system consisting of statistical PMMA/PnBMA copolymer films of various composition. The experimental results are obtained by performing differential increasing and de…
It is common for thin films to have a predominant texture, but not alternating textures. In this letter, we report a copper film of alternating textures through self-organization. Using dc magnetron sputtering technique, we deposit copper films on a SiO2/Si(111) substrate. A thin layer of copper of 〈111〉 texture is fi…
Abstract Conductive polymer composites used as candidates for positive temperature coefficient (PTC) materials are faced with performance decay characterized by gradually increased room‐temperature resistivity and decreased PTC intensity. Considering that deterioration of the properties is mainly related to the capabi…
Abstract Polyethylene (PE)‐filled with carbon black (CB) is a prototypical composite that displays resistance switching. These materials can exhibit either a positive temperature coefficient (PTC) or negative temperature coefficient (NTC). The CB‐filled semicrystalline polymer composites ideally need antioxidants, whi…
We report here the X-ray magnetic circular dichroism (XMCD) study at the Gd M(4,5)- and L(2,3)-edges of two linear magnetic chains involving Gd(III) cations bridged by nitronyl nitroxide radicals. This spectroscopy directly probes the magnetic moments of the 4f and 5d orbitals of the gadolinium ions. We compare macros…
A novel layered K(4)Ag(2)Sn(3)S(9) x 2KOH was synthesized solvothermally. A mixture of ethanol and HSCH(2)CH(SH)CH(2)OH was used for the synthesis. The HSCH(2)CH(SH)CH(2)OH plays an important role and appears to serve as a mineralizer for the solvothermal reaction. A layer comprises Sn(3)S(9)(6)(-) clusters linked by…
For the first time to our knowledge, the ${}^{13}\mathrm{C}$ solid-state magic angle spinning (MAS) NMR spectrum of a 99% ${}^{13}\mathrm{C}$ enriched tetrahedral amorphous-carbon (ta-C) thin film containing a high concentration of fourfold coordinated carbon species (82%) is reported along with measured NMR spectra f…
A comparative investigation has been carried out on second-row-atom-doped linear carbon clusters C n X/C n X + /C n X - ( n = 1−10) using density functional theory (DFT-B3LYP) method in conjunction with 6-311+G* basis sets. For each linear C n X/C n X + /C n X - species, the low-lying states, total energies, geometrie…
Abstract Star S‐SBR can be produced in one step by a kind of new anion polymerization technology in which modified naphthalene lithium acted as the initiator and SnCl 4 acted as the coupling agent. The influence of the molecular structure of star S‐SBR on its mechanical and dynamic properties was studied. The results…
By using a classical photo camera and a high-speed video camera, snapshots and time sequences of the dynamics of champagne bubbles collapsing close to each other in a bubble raft composed of quite monodisperse millimetric bubbles were made, thus completing two recent works (Liger-Belair et al. in C. R. Acad. Sci. Pari…
Reaction of [U(COT)(BH 4 ) 2 (THF)] (COT = η-C 8 H 8 ) with the dithiocarbonates dddtCO and dmioCO (dddt = 5,6-dihydro-1,4-dithiine-2,3-dithiolate; dmio = 1,3-dithiole-2-one-4,5-dithiolate) gave the neutral dithiolene compounds [U(COT)(dithiolene)] 2 in good yields (dithiolene = dddt, dmio, or 1,3-dithiole-4,5-dithiol…
Abstract Low molecular weight poly(ether ketone)s were synthesized from phenol, 1,4‐phenylenedioxy diacetylchloride, chloroacetylchloride, and dichloroalkanes [1,2‐dichloroethane and dichloromethane] by a Friedel–Crafts reaction with anhydrous aluminum chloride as a catalyst and carbon disulfide as a solvent. The cond…
The shapes of things to come: The use of the extremely bulky tBu3SiS ligand has enabled the synthesis of rare ferrous wheels (depicted), a unique ellipse, and an uncommon ferrous cube based on tetrahedral coordination. Fe=red, Cl=green, S=orange, Si=blue, C=gray.
In this paper we analyzed the adsorption of a large number of gases and vapors on graphitized thermal carbon black. The Henry constant was used to determine the adsorbate−adsorbent interaction energy, which is found to be a modest decreasing function of temperature. Analysis of the complete adsorption isotherm over a…
Abstract Copper nanoclusters were synthesized by a chemical reduction of an aqueous copper salt solution by sodium borohydride. A polyaniline nanocomposite containing copper nanoclusters was prepared by polymerizing a monomer aniline hydrochloride solution containing the copper nanoclusters using ammonium persulfate a…
Abstract In this study, the effects of thermally conductive filler type (α‐Al 2 O 3 , SiC), volume fraction of the filler, and filler particle size distribution on the thermal conductivity and viscosity of room‐temperature‐vulcanized (RTV) silicone rubber and silicone grease were investigated. We were interested to fi…
Abstract A series of novel high refractive index episulfide‐type optical resins were prepared by ring‐opening copolymerization of bis(β‐epithiopropylthioethyl) sulfide (BEPTES) with episulfide derivative of diglydicyl ether of bisphenol A (ESDGEBA) and 2,4‐tolylene diisocyanate (TDI), respectively, in the presence of…
The game continues…︁ Self-assembled sulfide supertetrahedra can be used to generate porous solids with unusual electoluminescence and semiconducting properties. Recent advances, including the discovery of corner-linked superclusters (see picture) and super-supertetrahedral clusters, may lead to materials, the properti…
[reaction: see text] A library of hanging porphyrin xanthene (HPX) compounds containing pendant groups with various proton-donating abilities (pK(a) ranging from approximately 2 to 25) has been synthesized. Their corresponding chloroiron(III) complexes promote the catalase-like disproportionation of hydrogen peroxide.…
A new dyad 1 with two spiropyran units as the photochromic acceptors and one fluorescein unit as the fluorescent donor was synthesized and characterized. External inputs (ultraviolet light, visible light, and proton) induce the reversible changes of the structure and, concomitantly, the absorption spectrum of dyad 1 d…