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。
We present experimental measurements of the cholesteric-smectic phase transition of suspensions of charged semiflexible rods as a function of rod flexibility and surface charge. The rod particles consist of the bacteriophage M13 and closely related mutants, which are structurally identical to M13, but vary either in c…
Abstract Covalently crosslinked networks based on poly(propylene glycol) bis(acetoacetate) with either neopentyl glycol diacrylate or hydroxyethyl acrylate derivatized bis(4‐isocyanatocyclohexyl)methane (HMDI) were prepared utilizing the Michael addition reaction in the presence of catalytic quantities of diazabicyclo…
Superoxide dismutase (SOD) from Potentilla atrosanguinea (Wall. ex. Lehm.) was crystallized using 20% PEG 3350 and 0.2 M ammonium iodide and diffraction data were collected to 2.36 A resolution using an in-house Cu Kalpha X-ray source. Analyses show that data with a redundancy of 3.2 were sufficient to determine the s…
We have performed detailed time-, field-, and temperature-dependent magnetic measurements on Cr-doped InN films, a dilute magnetic semiconductor (DMS) material which exhibits long range magnetic order above room temperature. We find a metastable magnetic behavior rather than common ferromagnetism. The temperature depe…
Abstract A temperature and strain rate dependent model for the thermoforming process of amorphous polymer materials is proposed. The polymeric sheet is heated at a temperature above the glass transition temperature then deformed to take the mold shape by the means of an applied pressure. The applied process temperatur…
Abstract This work describes six novel aromatic polyamides with bulky pendant groups, each having a polyisophthalamide backbone substituted with different urea groups in ring position 5 of the diacid or the diamine residue. Thus, one of the nitrogen atoms of the urea is chemically anchored to the main rigid polyamide…
The charge-ordered domain structure of $\mathrm{Yb}{\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$ has been studied by energy-filtered transmission electron microscopy. Dark-field imaging by using a spot of diffuse scattering revealed nanometer-sized charge-ordered domains. The domain size, which represents the approximate correla…
Monte Carlo computer simulation has been used to interpret and model observed single-crystal diffuse X-ray scattering data for pentachloronitrobenzene, C(6)Cl(5)NO(2). Each site in the crystal contains a molecule in one of six different basic orientations with equal probability. However, no short-range order amongst t…
Abstract Polycarbazole (PCz) thin films have been synthesized by electrochemistry. The influence of the deposition technique, potentiostatic or potentiodynamic, on the properties of the PCz films has been studied using the deposition time and the potential maximum as parameters. The PCz films have been characterized b…
The L-2-haloacid dehalogenase enzymes catalyse the hydrolytic cleavage of a halogen from the C2 position of short-chain haloacids. The recombinant dehalogenase from the thermophilic archaeon Sulfolobus tokodaii has been cloned, overexpressed and purified to homogeneity. The 24 kDa enzyme was crystallized using the mic…
Abstract Biodegradable, amphiphilic, diblock poly(ε‐caprolactone)‐ block ‐poly(ethylene glycol) (PCL‐ b ‐PEG), triblock poly(ε‐caprolactone)‐ block ‐poly(ethylene glycol)‐ block ‐poly(ε‐caprolactone) (PCL‐ b ‐PEG‐ b ‐PCL), and star shaped copolymers were synthesized by ring opening polymerization of ε‐caprolactone in…
A new method of reversibly moving CdS nanoparticles in the perpendicular direction was developed on the basis of the phase separation of block copolymer brushes. Polystyrene-b-(poly(methyl methacrylate)-co-poly(cadmium dimethacrylate)) (PS-b-(PMMA-co-PCdMA)) brushes were grafted from the silicon wafer by surface-initi…
Abstract Raman spectroscopy has been used to characterise four natural halotrichites: halotrichite FeSO 4 .Al 2 (SO 4 ) 3 . 22H 2 O, apjohnite MnSO 4 .Al 2 (SO 4 ) 3 .22H 2 O, pickingerite MgSO 4 .Al 2 (SO 4 ) 3 .22H 2 O and wupatkiite CoSO 4 .Al 2 (SO 4 ) 3 .22H 2 O. A comparison of the Raman spectra is made with the…
A structural phase transition from space-group symmetry P2(1)/c to C2/c is reported for NaTaOGeO(4) (NTGO). The critical temperature has been located at T(c) = 116 K, based on the appearance of sharp diffraction maxima at positions h + k = 2n + 1 of reciprocal space on cooling below this temperature. Strongly anisotro…
Abstract A concentration‐dependent Raman study of dimethyl formamide (DMF) in Ag nanocolloidal solution was carried out in order to observe the effect of concentration on the surface enhancement mechanism. The Raman spectra in the region 900–2200 cm −1 comprising four prominent Raman modes were measured experimentally…
The behavior of nanostructured and submicrometer α‐Al 2 O 3 powders during the initial stages of field‐assisted sintering technique (FAST), conventional, and microwave sintering was investigated using the laser‐flash technique for thermo‐optical measurements (TOM). An enhanced neck formation due to surface diffusion a…
Disperse dyes are very hydrophobic molecules that in their commercial form are usually milled in the presence of large amounts of dispersing agents (synthetic surfactants). Other dispersing agents are added as auxiliaries during the dyeing process. These synthetic surfactants were substituted for liposomes prepared wi…
Abstract In order to quantify the contribution of mainly, but not only, diimine ligands to the electronic properties of the corresponding complexes, two novel indices, namely modified electronic parameters ( ModEP ) and electrophilicity, ω , are introduced and discussed in this report. First, we introduce the concept…
We have synthesized a catalytically active polymer inspired by the naturally occurring protein silicatein α and have shown it to catalyze the formation of silica from tetraethoxysilane under near-neutral pH and ambient temperatures. We based the composition of the polymer on the functionalities found in silicatein α,…
Abstract Polyelectrolyte complexes between poly(methacrylic acid, sodium salt) and poly(diallyldimethylammonium chloride) (PDADMAC) or poly[2‐(methacryloyloxyethyl)trimethylammonium chloride] (PMOETAC) form gels, liquid phases, or soluble complexes depending on charge ratio, total polymer loading, polymer molecular we…