Materials Literature
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Matrix-assisted laser desorption/ionization with time-of-flight mass spectrometry is used to examine the formation of N-pyroglutamate (pGlu) in single, identified neurons from Aplysia. Six pGlu peptides are identified in the R3-14 and the R15 neurons that result from in vivo processing of peptides containing either Gl…
The difference in the surface-assisted in-plane photoalignment of a nematic liquid crystal between poly[methyl ( p -methacryloyloxy)cinnamate] (pCin0) and poly[methyl ( p -methacryloyloxyethoxy)cinnamate] (pCin2) in a film state is described. Irradiation of a film of pCin2 with linearly polarized 313 nm light generate…
Abstract The self-assembly of sodium stearate and its homologs ( >C12) in hydrotalcite (LDH) interlayers was found to change reversibly between mono- and bilayer structures with a ratio changing continuously within a range of 70 °C and 5 °C in stoichiometric intercalations in aqueous dispersion. The bilayer str…
Mixed valence complexes containing ferro- and ferricyanide have been known for almost 300 years, but no dinuclear, non-polymeric examples of these complexes have been structurally characterized. Here we report the first such example, comprising ferrocyanide coordinated to a pentaaminecobalt(III) complex. This FeII−CoI…
Abstract A typical perovskite La 0.2 Sr 0.8 Co 0.2 Fe 0.8 O 3‐δ (LSCF) membrane and a novel perovskite‐related ZrO 2 ‐doped SrCo 0.4 Fe 0.6 O 3‐δ (SCFZ) membrane were successfully prepared. The sintered membranes were characterized by an in‐situ high‐temperature X‐ray diffraction, scanning electron microscopy and ener…
Phase transformations in organic superconductor $\ensuremath{\kappa}\ensuremath{-}{(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})}_{2}{\mathrm{Cu}[\mathrm{N}(\mathrm{CN})}_{2}]\mathrm{Br}$ and its deuterated analog have been studied by resistance measurements of structural relax…
The absorption and fluorescence spectra of terthiophene (TT) as well as three substituted terthiophene derivatives, namely 3,3‘ ‘-dimethoxy-2,2‘:5‘,2‘ ‘-terthiophene (DMOTT), 3,3‘ ‘-dimethyl-2,2‘:5‘,2‘ ‘-terthiophene (DMTT), and 3‘,4‘-dihexyl-2,2‘:5‘,2‘ ‘-terthiophene (DHTT), isolated in an alkane matrix and in their…
We report on high-frequency (300--700 GHz) ferromagnetic resonance (HF-FMR) measurements on cobalt superparamagnetic particles with strong uniaxial effective anisotropy. We derive the dynamical susceptibility of the system on the basis of an independent-grain model by using a rectangular approach. Numerical simulation…
Changes in the optical-absorption properties of hydroxyl group (\ensuremath{\equiv}SiOH) in silica glasses were studied to determine the specific form of \ensuremath{\equiv}SiOH whose absorption takes place at around the intrinsic absorption edge of silica glass (\ensuremath{\sim}8 eV). In the experiments, four kinds…
The crystallographic texture of electroplated Cu in damascene trenches has been examined by x-ray diffraction pole figure analysis. The influence of two post-plating treatments on the resulting orientation of (111) planes of the Cu inside the trenches are compared. When the as-deposited small-grained Cu is allowed to…
The coupled Hartree–Fock (CHF) equations in second order are derived to calculate dynamic polarizabilities and hyperpolarizabilities for infinite periodic chains. The analytical expressions for the second derivatives of the perturbed crystal orbitals with respect to the quasimomentum k are developed. The first and sec…
Cosputtered Ta–Si–N amorphous films of ten different compositions were investigated as a barrier material for Cu interconnection. The films of relatively low nitrogen content (<47 at. %) undergo an abrupt failure with the formation of tantalum silicides and copper silicide between Si and Cu during annealing. Ta…
The crystal structure of the deuterated Tutton salt (ND 4 ) 2 [Cu(D 2 O) 6 ](SO 4 ) 2 determined by X-ray diffraction at several temperatures between 100 and 321 K is reported. The intermediate and longest Cu−O bond lengths of the Jahn−Teller distorted octahedral Cu(D 2 O) 6 2+ ion progressively converge as the temper…
Scanning tunneling spectroscopy (STS) has been used to investigate the electronic structure of tetrahedral amorphous carbon (ta-C) films. The density of states (DOS) was derived from the normalized conductivity spectra at fixed tip heights. Band edges were defined by extrapolating the generalized conductivity (dI/dV)…
The crystal structure of a triple helical peptide (Pro-Hyp-Gly)10 has been determined at 1.9 A resolution. Single crystals grown by the hanging drop method, diffracted to a resolution of 1.8 A. The polymer-like structure of the triple helical repeat Pro-Hyp-Gly was in accordance with the 7/2 model proposed for collage…
Functionalized metallodendrimers are a rational synthetic target for gas sensing since a range of transition metal centers can potentially be used and the ligand fragments may serve as anchoring points to an appropriate support. The authors summarize the synthetic approach to compounds such as that shown in the Figure…
Shake-and-Bake is a direct-methods procedure which has provided ab initio solutions for protein structures containing as many as 1000 independent non-H atoms. This algorithm extends the range of conventional direct methods by repetitively, unconditionally and automatically alternating reciprocal-space phase refinement…
Common Berthing Mechanism (CBM provides the structural interface between separate International Space Station (ISS) elements, such as the Laboratory and Node modules. The CBM consists of an active and a passive half that join together with structural bolts. The seal at this interface is the CBM-to-CBM molded seal. The…
A new marine diatom, Thalassiosira andamanica, is described from light and electron microscopy. The specimens were collected in the vicinity of Phuket Marine Biological Center, Thailand, and later brought into clonal culture. Thalassiosira andamanica possess a rimoportula with a pronounced outer extension, one margina…
A detailed investigation of the microscopic mechanisms of tensile stress deformation was performed. The experiments involved two different thermoplastic materials: high impact polystyrene (HIPS) and a novel polystyrene (PS)−polybutadiene (PB) blend, at temperatures ranging from 30 to 70 °C, deformed at a constant unia…