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。
Erbium biphthalocyanine (HErPc2) nanorods or nanowires were encapsulated in the cavities of MWCNTs simply by the capillary filling method. The length and the diameter of the nanowires can be easily tailored by the MWCNTs mold, capillary filling time, and the concentration of HErPc2. When the optical, electronic, and m…
The effect of spherical and sphero-cylindrical fillers on the order–disorder transition (ODT) of a symmetric diblock copolymer melt is investigated. Self-consistent equations describing the copolymer density distribution in the presence of fillers are derived. Using these equations, we calculate the excess free energy…
Heterostereocomplexes between d-PLA and l-peptides, obtained by spontaneous precipitation from acetonitrile solution, were characterized by thermal analysis and microscopic techniques. Differential scanning calorimetry showed two transition endotherms, one for the alpha form that melts at 178 degrees C and one for the…
We have investigated deformation luminescence phenomena and the constituent phases of SrMgAl6O11:Eu. The deformation luminescence is clearly visible to the naked eye in air, and the luminescence intensity is the highest among the materials reported. Using x-ray diffraction the constituent phases of SrMgAl6O11:Eu are d…
Thin films containing boron, carbon, and oxygen were synthesized by plasma-enhanced chemical vapor deposition (PE-CVD). When the thin films were exposed to humid atmosphere, nano- or micro-scale boric acid structures were observed to grow spontaneously. Depending on the relative humidity, temperature, and exposure tim…
Photobleaching of organic optical materials can be used to structure the surface layer for integrated optics applications. Linear optical properties and absorption were studied in 4-N, N-dimethylamino-4′-N′-methyl stilbazolium tosylate (DAST) organic crystals within the absorption band from 260–700 nm in order to dete…
The behavior of species in the gas phase and their effects on the etching characteristics of organic film with the lower dielectric constant (low-k) were investigated in 500 MHz ultrahigh frequency (UHF) plasma using N2/H2 and N2/NH3 gases. The absolute H and N radical densities and NH3 molecule density in etching pla…
Abstract The graft copolymerization of acrylonitrile (AN) onto Cassia tora gum (CTG) was carried out in an aqueous medium with a ceric ammonium nitrate (CAN)–nitric acid initiation system. The percentage grafting and percentage grafting efficiency were determined as functions of the concentrations of CAN, nitric acid,…
In this letter, we report the formation of bulk samples of silica-based glass containing Si nanocrystals (Si-ncs) by pyrolysis of a preceramic precursor. The starting precursor is a sol–gel-derived polysiloxane containing only Si–H groups which leads, after annealing in a controlled atmosphere in the range 1000–1200 °…
The title compound, a new polymorphic phase of iron diphosphate, was prepared by solid-state reaction. This compound crystallizes in the monoclinic space group P 2 1 / c with a = 4.4668(6) Å, b = 9.896(1) Å, c = 5.2077(7) Å, β = 97.516(2)°, V = 228.22(5) Å 3, and Z = 2. The structure is characterized by the arrangemen…
Tb 3+ -doped Lu2O3 sintered ceramics were prepared in vacuum and in air. It was shown that the vacuum-sintered disks are able to store energy when irradiated with 300-nm or shorter photons. A small part of the stored energy could be recovered with 980-nm light. A much more significant amount of the stored energy could…
A novel method is introduced to estimate surface coverage and the equation of state of insoluble surfactant on droplets, involving measurement of interfacial tension on a single parent drop and progressively subdivided generations of daughter drops. This has enabled quantitative decomposition of the dilution, tip-stre…
Amorphous diamond-like carbon films were irradiated with high-energy heavy ions like 1 GeV uranium or 340 MeV gold. The large energy deposition along the ion track leads to a transformation of the material from insulating diamond-like to conducting graphite-like carbon. The ion tracks form thin straight channels (nano…
Chirality of optically active liquid crystal molecules has become an important research topic and the subject of a number of theoretical and experimental studies. We present here the results of the application of a newly developed scaling method of a chiral index to a range of chiral molecules. Good agreement is found…
AlN layers grown on Al2O3 substrates by metalorganic chemical vapor desposition were implanted with high doses (3×1016 cm−2, 250 keV) of Co+, Cr+, or Mn+. Band-edge photoluminescence intensity at ∼6 eV was significantly reduced by the implant process and was not restored by 950 °C annealing. A peak was observed at 5.8…
We have studied crystallization in a system of sedimenting colloids in real space using fluorescence confocal microscopy. During sedimentation a gradient in particle concentration develops at the bottom of the sample container. The presence of the lower boundary wall induces layering in the liquid and, upon increasing…
Collagen model peptide (Pro-Pro-Gly)10 has a triple helical structure and undergoes a thermal transition to a single random coil structure. The transition temperature of the analogous model peptides depends largely on amino acid substitution. Substitution of Pro by 4-hydroxyproline (Hyp) or 4-fluoroproline (fPro) has…
A first-principle investigation of the effects of multiple Si=O bonds at the surface of silicon-based clusters with different sizes has been carried out. Total-energy pseudopotential calculations within density functional theory have been applied varying systematically the number of Si=O bonds at the clusters surface.…
Abstract The compatibility of natural rubber/ethylene‐propylene‐diene monomer (EPDM) blends with and without different compatibilizers was evaluated with viscosity measurements, differential scanning calorimetry, and scanning electron microscopy. The blends were modified with two methods. In the first method, high‐ene…
We report on the in-situ formation of ZnO nanobelts and metallic Zn nanobelts and nanodisks in a transmission electron microscope by electron-beam irradiation of single-crystalline polyhedral Zn nanoparticles, which were synthesized by evaporating ZnO powder mixed with graphite in a N 2 flowing carrying gas environmen…