Materials Literature
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Using atom transfer radical polymerization (ATRP), poly( tert -butyl methacrylate- b -styrene- b -4-vinylpyridine) or P t BMA- b -PS- b -P4VP linear triblock copolymers were synthesized. Different homopolymer and diblock copolymer macroinitiators were used for different block copolymerizations. For a selected triblock…
A constitutive relationship for modeling of shock wave propagation in orthotropic materials is proposed for nonlinear explicit transient large deformation computer codes (hydrocodes). A procedure for separation of material volumetric compression (compressibility effects equation of state) from deviatoric strain effect…
Single crystal Cu(001) layers were grown on MgO(001) by ultrahigh vacuum magnetron sputtering at Ts=100 °C. Quantitative surface morphological analyses by in situ scanning tunneling microscopy show that the surfaces exhibit self-affine mound structures with a scaling exponent of 0.82±0.03 and a mound radius rc that in…
Results are presented for an in situ synchrotron-based ultra-small-angle X-ray scattering (USAXS) study of the solution-mediated formation and growth of nanocrystalline ceria (n-CeO 2 ) using a new remote-controlled, isothermal, circulating fluid flow cell. The fluid flow mitigates or reduces X-ray beam-induced damage…
In this article, the dependence of effective magnetostriction of the bulk superconductors on the parameters including the elastic moduli and volume fraction is investigated. For a bulk superconductor of nonsuperconducting particles dispersed in a superconducting matrix, a simple and approximate model for effective mag…
The results of measurements of temperature and magnetic-field dependences of magnetization, resistivity, thermopower, and Hall effect in ${\text{La}}_{0.7}{\text{Ca}}_{0.3}{\text{MnO}}_{3}$ single crystal are reported. It is shown that below 220 K, the holes of low mobility dominate conductivity, so that the crystal b…
The adsorption and subsequent reaction of methanol on Cu(110) and on the oxygen stripe phase on Cu(110) was investigated using reflection absorption infrared spectroscopy (RAIRS), temperature-programmed desorption (TPD) and density functional theory (DFT) calculations. It was shown that during high methanol exposures…
Abstract— The rewritable azo‐dye photoalignment (ORW) of liquid crystals (LCs) for application in optical rewritable electronic paper has been investigated. It was observed that a periodic change in the azimuthal aligning direction with polarized UV light (365 nm) brings about homeotropic alignment, while utilization…
PACS. 47.57.-s – Complex fluids and colloidal systems. PACS. 82.20.Wt – Computational modeling; simulation. PACS. 83.10.Pp – Particle dynamics. PACS. 83.80.Kn – Physical gels and microgels. Abstract. – In this letter, we investigate several aspects related to the effect of hydrodynamics interactions on phase separatio…
The effects of UV radiation curing on the glass structure and fracture properties were examined for a class of nanoporous organosilicate low dielectric constant films. A detailed characterization by nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy showed significant changes in the gl…
When added to protein solutions, poly(ethylene glycol) (PEG) creates an effective attraction between protein molecules due to depletion forces. This effect has been widely used to crystallize proteins, and PEG is among the most successful crystallization agents in current use. However, PEG is almost always used in com…
Confocal Raman microscopy was used to image and record the Raman spectra of individual single-wall carbon nanotubes (SWNTs) and single-layer graphene on silicon substrates at both room and low temperatures. The temperature-induced Raman spectral change of individual nanotubes is observed to be tube diameter dependent,…
Abstract Hall‐effect measurements on single crystal boron‐doped CVD diamond in the temperature interval 80–450 K are presented together with SIMS measurements of the dopant concentration. Capacitance–voltage measurements on rectifying Schottky junctions manufactured on the boron‐doped structures are also presented in…
We report $^{31}\mathrm{P}$ and $^{139}\mathrm{La}$ NMR studies of $({\mathrm{La}}_{0.87}{\mathrm{Ca}}_{0.13})\mathrm{FePO}$, which is a family member of the recently discovered superconductor $\mathrm{LaFeAs}({\mathrm{O}}_{1\ensuremath{-}x}{\mathrm{F}}_{x})$. In the normal state, Knight shift and nuclear spin-lattice…
Oxidation kinetics of Ni-Al (100) alloy surface is investigated at low temperatures (300--600 K) and at different gas pressures using molecular dynamics (MD) simulations with dynamic charge transfer between atoms. Monte Carlo simulations employing the bond order simulation model are used to generate the surface segreg…
The structural and energetic properties of A2Hf2O7 (A=Dy, Ho, Er) compounds have been investigated by means of ab initio total energy calculations. For Er2Hf2O7 the defect fluorite structure is predicted to be more stable than pyrochlore structure, agreeing well with previous experimental [J. Inorg. Nucl. Chem. 31, 23…
The effects of electron beam irradiation on the luminescence of ZnO single crystals were investigated by cathodoluminescence. We have found that the evolution of the intensity during the e-beam irradiation depends on the surface polarity. For O-face, the ultraviolet (UV) emission decreases exponentially and approaches…
Abstract A controllable roughened silver surface with high surface‐enhanced Raman scattering (SERS) activity and high reproducibility has been developed in this study. This silver surface was prepared by silver nucleation in polyelectrolyte multilayers (PEMs) and silver‐enlarged growth. First, the small Ag nuclei were…
A model of photoemission from cesium antimonide (Cs3Sb) that does not rely on adjustable parameters is proposed and compared to the experimental data of Spicer [Phys. Rev. 112, 114 (1958)] and Taft and Philipp [Phys. Rev. 115, 1583 (1959)]. It relies on the following components for the evaluation of all relevant param…
As a part of a wide plan concerning the novel organic materials, a set of newly organic semiconductors has been obtained in our laboratories. In this paper, a clear overview was reported for elucidating the preparation processes of the chromium−copper mixed crystals. In line with the novel pyrazole diphenylphosphino-m…