Materials Literature
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Thermal properties, such as thermal transport, heat capacity and its relation to elastic constants, and He adsorption, are presented by comparing theoretical predictions, in general for individual C-nanotubes (NT), to some typical experimental results commonly obtained not on individual NTs, but on larger collective a…
With the step-growth polymerization of bis(oligopeptides) and diisocyanates, two silk−proteinlike multiblock polymers ( P1, P2 ), containing −(Ala) 4 − and −(GlyAlaGlyAla)− sequence derived from the crystalline region of spider dragline silk and silkworm ( Bombyx mori) silk respectively, has been synthesized successfu…
This paper is a review of the theoretical and experimental studies devoted so far to the electronic structure of pure carbon nanotubes, including single-wall, multiwall, and ropes of single-wall nanotubes. A universal picture of the band structure of single-wall nanotubes is obtained by exploiting a particular helical…
Cyclic voltammetry, scanning tunneling microscopy (STM), and surface-enhanced Raman spectroscopy (SERS) are used to investigate the interactions between lacunary polyoxometalate, α-SiW 11 O 39 8 -, and glassy carbon, Au(111), and Ag(111) electrode surfaces. The cyclic voltammetry and STM measurements show that α-SiW 1…
The short-chain oxidoreductase (SCOR) family of enzymes includes over 2000 members identified in sequenced genomes. Of these enzymes, approximately 200 have been characterized functionally, and the three-dimensional crystal structures of approximately 40 have been reported. Since some SCOR enzymes are involved in hype…
In 1984, Erpenbeck observed a shear-induced alignment of particles into strings in nonequilibrium molecular dynamics simulations of hard spheres. Since then, it has remained unclear if this effect was genuine or if it arose from the use of a thermostat which assumed an incorrect form for the velocity profile. All stud…
Abstract The effect of rare earth (Dy and Sm) and transition metal (Mn) luminescent impurities on the optical properties of As2S3 glasses is studied in a wide spectral region. The Raman, IR, band-to-band and edge absorption spectroscopy are employed to obtain information about the incorporation of impurity ions in the…
We have studied the microstructure and morphology evolution in PbSe films chemically deposited on GaAs(100) substrates. The films consisted of a single phase of nanocrystalline rocksalt PbSe. The deposition temperature was found to be an important parameter which strongly influences the film morphology. A gradual tran…
The structure of Streptococcus suis serotype type 2 dTDP-d-glucose 4,6-dehydratase (RmlB) has been determined to 1.5 A resolution with its nicotinamide coenzyme and substrate analogue dTDP-xylose bound in an abortive complex. During enzyme turnover, NAD(+) abstracts a hydride from the C4' atom of dTDP-glucose-forming…
Near-infrared spectroscopy was utilized as a polymorph screening method. A model compound (sulfathiazole) was recrystallized from various solvents, and the crystals were milled using a planetary ball mill and compressed using a hydraulic press. The polymorphism of recrystallized and processed samples and the effect of…
The rates of the dehydrogenation of the sodium alanates NaAlH 4 and Na 3 AlH 6 doped with 2 mol % Ti or Zr have been measured over the temperature range 363−423 K. NaAlH 4 and Na 3 AlH 6 undergo dehydrogenation at equal rates upon direct doping with titanium. However, Na 3 AlH 6 arising from the dehydrogenation of Ti-…
Azobenzene-conjugated mononuclear and dinuclear terpyridyl complexes of Co(II), Co(III), and Fe(II) were synthesized, and their photoisomerization behavior was investigated. Co(II) and Co(III) complexes, [tpyCo(tpy-AB)]X(n) and [(Cotpy)(2)(tpy-AB-tpy)]X(n) (tpy-AB = C(15)N(3)H(10)-C(6)H(4)-N=NC(6)H(5), tpy-AB-tpy = C(…
This paper presents a study of the damage production in yttria-stabilized cubic zirconia single crystals irradiated with medium-energy (from 30 to 450 keV) heavy ions (from He to Cs). The disorder created in the two sublattices (Zr4+ and O2−) of the crystals and the lattice sites of heavy ions were determined as a fun…
The present work describes the fabrication, characterization, and optimization of NH 2 -derivatized polymer coatings prepared by pulsed-plasma polymerization for applications as adhesion layers in DNA immobilization. Fourier transform infrared spectroscopy and surface plasmon resonance spectroscopy were used to study…
Hydrogen storage in new nano-structured carbonic materials is a topic for lively discussion. The measured storage capacities of these materials, which have been announced in the literature during the last ten years are spread over an enormous range from about 0.1 wt% up to 67 wt%. This paper will give a report on the…
The protein cage of the 12-subunit ferritin-like protein from Listeria innocua has been utilized as a size and shape constrained reaction environment for the synthesis of two cobalt oxide minerals, Co(3)O(4) and Co(O)OH. Reaction of Co(II) with H(2)O(2) at pH 8.5 under either elevated temperature (65 degrees C) or amb…
We have analyzed magnetization measurements in a series of composition-related Ni-Mn-Ga shape-memory alloys. It is shown that the magnetocaloric effect in the vicinity of the martensitic transition mainly originates from two different contributions: (i) magnetostructural coupling on the mesoscopic scale between the ma…
We present experimental and theoretical results on intrusion-extrusion cycles of water in hydrophobic mesoporous materials, characterized by independent cylindrical pores. The intrusion, which takes place above the bulk saturation pressure, can be well described using a macroscopic capillary model. Once the material i…
We present an all-electron study of the dynamical density-response function of hexagonal close-packed transition metals Sc and Ti. We elucidate various aspects of the interplay between the crystal structure and the electron dynamics by investigating the loss function, and the associated dielectric function, for wave-v…
We report experiments investigating the behaviour of micron-scale fluid droplets jetted onto surfaces patterned with lyophobic and lyophilic stripes. The final droplet shape depends on the droplet size relative to that of the stripes. In particular when the droplet radius is of the same order as the stripe width, the…