Materials Literature
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Abstract The origin of the Boson peak was investigated using Raman spectroscopy and ab initio calculations. Low frequency Raman active vibrational modes of different branchy‐, ring‐ and cage‐like As m S n nanoclusters were calculated and compared to experimentally determined Raman spectra of As x S 100‐x glasses with…
Morphological evolution of poly( l -lactic acid) (PLLA) crystals obtained via crystallization at T c = 85 to 97 °C from 0.1% solutions in mixed xylene was closely followed via transmission electron microscopy. Upon stirring-enhanced nucleation after the adopted incubation scheme ( t i = 10 h at T i = 90 °C), there eme…
The magnetic behavior of undoped (neutral), substituted poly(thiophene)s is reported. In particular, the influence of the nature of the substituent (alkyl, alkoxy, thioalkyl), the substitution pattern (head-to-tail (HT) versus head-to-head−tail-to-tail (HH-TT)), and the regioregularity on the magnetic properties has b…
Ein großer Fortschritt: Elektrochemisch synthetisierte, tensidstabilisierte Goldcluster (AuACs; Aun, 5≤n≤13) katalysieren die elektrochemische Reduktion von Sauerstoff (ORR) in saurer Lösung bei geringen Überpotentialen. Abhängig von der Tensidkonzentration wechselt der Mechanismus der ORR allmählich von einem Vier- z…
Abstract The comparative analysis of the calculated and experimental Raman spectra of non‐crystalline As 2 S 3 , Bi 2 S 3 and Sb 2 S 3 films ( i.e. with exchanging As to Sb, Bi) obtained by flash evaporation on glassy and silicon substrates was performed. The spectra were interpreted and analysed using the results of…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Novel Linear Titanium(IV)-POSS Coordination PolymerMichael T. Hay*†, Bradley Seurer‡, Daniel Holmes§, and Andre Lee‡View Author Information† Penn State Beaver, 100 University Drive, Monaca, Pennsylvania 15061‡ Chemical Engineering…
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTGrowth of Cu Metal Films at Room Temperature Using Catalyzed ReactionsSang-Woo Kang†, Ju-Young Yun†, and Yun Hee Chang*‡View Author Information† Vacuum Center, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea‡ NanoBio Fusion Research Center, Korea…
The first direct observation of large scale molecular level ordering in a complex poly(3-alkylthiophene)-based thin film is reported. The fabrication and characterization of highly ordered thin films made from the regioregular, amphiphilic polythiophene derivative poly(3-(11-(2-tetrahydropyranyloxy)undecyl)thiophene)…
Poly(methyl methacrylate) (PMMA)/layered silicate nanocomposites were prepared using melt intercalation technique. Commercially modified nanoclays such as Cloisite 30B (C30B), Cloisite 20A (C20A), and Bentone 109 (B109) have been used as organoclays for the preparation of nanocomposites. PMMA matrix has been grafted w…
A molecular tug of war between non- and semifluorinated alkyl chains (see picture) occurs when they are forced together by ionic attachment to a poly(propylene imine) dendrimer. Unexpected mesomorphic properties appear as a consequence of the competition of both substituents to control the supramolecular organization…
Meixnerite, which is a magnesium-aluminium hydrotalcite compound, is a hydrotalcite group mineral material with double layer structure. Recently, to prevent the environmental pollution caused by greenhouse gases, especially CO2, studies for production of synthetic meixnerite have been carried out. Meixnerite releases…
Abstract The present paper is aimed to evaluate the efficiency of two masterbatches, i.e., EBAGMA/LDPE (MB1) and EBAGMA/PET (MB2) with 50/50 w/w composition, prepared by melt mixing and used as new compatibilizers for blends of LDPE/PET. The morphology, the mechanical and the thermal properties of LDPE/PET/MB1 and LDP…
Three different kinds of polycondensation were preformed and the usefulness of HfCl4.2THF as estrification and polycondensation catalyst was evaluated. It was compared with HfCl4, BiCl3, LaCl3 and SnCl2. In polycondensations of 1,6-hexandiol, and 1,10-decandiol with various dicarboxylic acids all catalysts failed to g…
The Madelung constants for binary ionic nanoparticles are determined. The computational method described here sums the Coulombic interactions of each ion in the particle without the use of partial charges commonly used for bulk materials. The results show size-dependent lattice energies. This is a useful concept in te…
We report the growth and low-temperature photoluminescent characteristics of well-aligned Ni-doped ZnO nanoneedles and V-doped ZnO nanostructured thin film grown by a modified pulsed laser deposition technique.Low-temperature photoluminescence spectra of the as-grown films show the presence of free excitonic as well a…
Abstract cis ‐1,4‐Polyisoprene, a significant industrial elastomer, is electrospun into different nanostrucutures. Cis ‐1,4‐polyisoprene electrospun fibers are prepared from cis ‐1,4‐polyisoprene solutions in dichloromethane or chloroform and characterized by environmental scanning electron microscope and Fourier‐tran…
We have fabricated line gratings from periodically etched fused silica on which a thin silver film is deposited that is in turn covered with a silica index-matched fluid. This dielectrically symmetric geometry supports an independent long-range surface plasmon-polariton (LRSPP) and a short-range surface plasmon polari…
Temperature and initial concentration gradients have been used independently during thermal-induced phase separation to create anisotropic functional porous polymeric materials. In this paper, we developed and implemented a mathematical model that combines both linear temperature and initial linear concentration gradi…
Vertically aligned Zn2SiO4-SiOx(x < 2) core-shell nanotube arrays consisting of Zn2SiO4-nanoparticle chains encapsulated into SiOx nanotubes and SiOx-coated Zn2SiO4 coaxial nanotubes were synthesized via one-step thermal annealing process using ZnO nanowire (ZNW) arrays as templates. The appearance of different nanotu…
Among the condensed phases, those of lowest point group symmetry are the triclinic crystals, which have only the identity element or the identity and inversion elements. Such low symmetry is stabilized by the specificity of molecular interaction, which is weakened with increasing disorder, so that known phases with fl…