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Silver catalyzed gallium phosphide nanowires integrated on silicon and in situ Ag-alloying induced bandgap transition
In this work, we demonstrate a silver catalyzed heteroepitaxial growth of gallium phosphide nanowires (GaP NWs) on silicon. The morphology and growth direction of GaP NWs on differently orientated Si substrates were investigated. From crystallographic analysis, we inferred that Ag from catalyst is incorporated into the GaP during the chemical beam epitaxy (CBE) process. Using the PL spectrum and...
http://www.polymer.cn//ss/Luxubing/publicationsshow_12688.html |
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Strain-induced insulator-metal transition in ferroelectric BaTiO3 (001) surface: First-principles study
The electronic properties of TiO2-terminated BaTiO3 (001) surface subjected to biaxial strain have been studied using first-principles calculations based on density functional theory. The Ti ions are always inward shifted either at compressive or tension strains, while the inward shift of the Ba ions occurs only for high compressive strain, implying an enhanced electric dipole moment in the case o...
http://www.polymer.cn//ss/Luxubing/publicationsshow_12673.html |
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158. Supertoughened Polylactide Binary Blend with High Heat Deflection Temperature Achieved by Thermal Annealing above the Glass Transition Temperature
Through thermal annealing above the glass transition temperature, a supertoughened binary blend with the highest notched Izod impact strength of 98 KJ/m2 was achieved, which was about 52 times of that of neat polylactide (PLA; 1.9 KJ/m2). The binary blend was composed of biocompatible and biodegradable PLA and ethylene?acrylic ester?glycidyl methacrylate terpolymer (EGMA) elastomer at the compos...
http://www.polymer.cn//ss/zhigangwang/publicationsshow_12642.html |
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4.【J. Appl. Polym. Sci.】 Pressure-Dependent Glass-Transition Temperatures of poly(methyl methacrylate) /poly(styrene-co-acrylonitrile) Blends
The pressure-dependent glass-transition temperatures (Tgs) of poly(methyl methacrylate) (PMMA)/poly(styrene-co-acrylonitrile) (SAN) blends were determined by pressure–volume–temperature (PVT) dilatometry via an isobaric cooling procedure. The Gordon–Taylor and Fox equations were used to evaluate the relationships between the Tgs and compositions of the PMMA/SAN system at different pressures. ...
http://www.polymer.cn//ss/wengangyao/publicationsshow_12238.html |
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(Polymer) Order-Order, Lattice Disordering, and Order-Disorder Transition in SEBS Studied by Two-Dimensional Correlation Infrared Spectroscopy
The temperature-dependent transitions of polystyrene-block-poly(ethylene-co-1-butene) -block-polystyrene block copolymer (SEBS) at high temperature were studied using infrared spectroscopy combined with two-dimensional (2D) correlation spectroscopy. The order-order transition (OOT), the lattice disordering transition (LDT), and the order-disorder transition (ODT) of SEBS were explored with a lin...
http://www.polymer.cn//ss/zhoutaopoly/publicationsshow_10303.html |
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Gas-phase reactions of Co+ with ethylamine: A theoretical approach to the reaction mechanisms of transition metal ions with primary amines.
We report herein a comprehensive study of gas-phase reactions of Co(+) with ethylamine using density functional theory. Geometries and energies for all the stationary points involved in the reactions are investigated at the B3LYP/6-311++G(2df,2pd) level. Six different "classical" N and "nonclassical" ethyl-H attached isomers are found for the Co(+)-ethylamine complexes. The classical complexes a...
http://www.polymer.cn//ss/luxiaoqing/publicationsshow_10179.html |
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Preparation of poly(3 -butylthiophe ne) form II crystal by low-temperature aging and a proposal for form II-to-form I transition mechanism
As a metast able pha se, poly (3-butylthiophe ne) (P3BT) form II is generally obtaine d by solvent vapor treatment in rigorous condi tions and it is easi ly transformed to more comm only obs erved form I with heating. In the present study, by low temperature agi ng in carbo n disulfi de (CS2) solution, a simple and feasible method was proposed to prepare neat P3BT form II. Thus pr...
http://www.polymer.cn//ss/zhangjianming/publicationsshow_9945.html |
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014. Glass transition in single poly(ethylene oxide) chain: A molecular dynamics simulation study
Local dynamics of single poly(ethylene oxide) chain in various environments (bulk, film, and isolated systems) has been characterized by the reorientation functions of various backbone bond vectors. Within any observation time, the variations of these reorientation functions with the temperature can be well described by the Kohlrausch-Williams-Watts (KWW) like equation, in which the fitted tempe...
http://www.polymer.cn//ss/wuchaofu/publicationsshow_9827.html |
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Epoxidation of 1-butene to 1,2-butene oxide by transition metal disubstituted P-W-Mo ternary heteropoly quaternary ammonium salts
A series of transitional metal disubstituted ternary heteropoly quaternary ammonium salts, [TPA](4)H 3[PW7Mo3M2O38(H2O)(2)] (M = Mn, Co, Ni, Cu), were prepared by the reaction of the anion PW6Mo3O34 (9-) and the corresponding salts of the transitional metal in water, characterized by FI-IR, UV-Vis, XRD and TGA spectra, and appied to the epoxidation of 1-butene to 1,2-butene oxide (BO). The influ...
http://www.polymer.cn//ss/zhoujiancheng/publicationsshow_9158.html |
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One-pot synthesis of nanomaterials via RAFT polymerization induced self-assembly and morphology transition
通过聚合诱导自组装实现了高分子纳米线的高浓度制备。
http://www.polymer.cn//ss/wanwenming/publicationsshow_8981.html |
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