Materials Literature
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Martensitic and magnetic properties of ferromagnetic shape memory alloys are known to depend up on structural modulations and associated changes in the Fermi surface. These modulations although periodic and spanning over multiple unit cells, involve movement of atoms typically of the order of 0.01A. Therefore X-ray Ab…
We report the fast charging/discharging capability of poly(3,4-ethylenedioxythiophene) (PEDOT) nanotubes during the redox process and their potential application to a high-powered supercapacitor. PEDOT nanotubes were electrochemically synthesized in a porous alumina membrane, and their structures were characterized us…
The ammonia complex of magnesium borohydride Mg(BH4)2.2NH3 (I), which contains 16.0 wt % hydrogen, is a potentially promising material for hydrogen storage. This complex was synthesized by thermal decomposition of a hexaaammine complex Mg(BH4)2.6NH3 (II), which crystallizes in the cubic space group Fm3 m with unit cel…
Abstract We have carried out in situ Raman studies during the electrochemical insertion of lithium ions (Li + ) into pristine and thermally treated multiwalled carbon nanotubes (MWNTs). We found an improved structural integrity as well as the removal of defects in the thermally treated tubes. The different Li + insert…
Porous GaAs was formed by electrochemical etching of n-type GaAs wafers in HF- or HCl-based solution with different current densities. The porous structure formation has been confirmed by scanning electron microscopy and x-ray diffraction. The samples were subjected to Raman and photoluminescence (PL) spectroscopic in…
The reaction of the group 9 bis(hydrosulfido) complexes [Cp*M(SH)2(PMe3)] (M=Rh, Ir; Cp*=eta(5)-C 5Me5) with the group 6 nitrosyl complexes [Cp*M'Cl2(NO)] (M'=Mo, W) in the presence of NEt3 affords a series of bis(sulfido)-bridged early-late heterobimetallic (ELHB) complexes [Cp*M(PMe3)(mu-S)2M'(NO)Cp*] (2a, M=Rh, M'=…
Abstract The FRG has no economical access to crude oil. It is therefore an important future task to organize a post‐fossil sustainable era of material economy and to develop new processes based on alternative carbon sources. The change in raw material base is not a new experience for the chemical industry, it has alwa…
We present here the first examples of Cu-azide compounds synthesized by using protonated diamine ions as cationic templates: (dmenH(2))[Cu(6)(N(3))(14)] and (trimenH(2))[Cu(6)(N(3))(14)](dmenH(2)(2+): N,N'-dimethylethylenediammonium; trimenH(2)(2+): N,N,N'-trimethylethylenediammonium). Both compounds possess a similar…
The optical properties of damaged periodic and aperiodic domains created by ${\mathrm{Pb}}^{+}$ $(280\phantom{\rule{0.3em}{0ex}}\mathrm{keV})$ and ${\mathrm{Au}}^{4+}$ $(10\phantom{\rule{0.3em}{0ex}}\mathrm{MeV})$ implantation of zircon were studied using micro-infrared (IR) and micro-Raman spectroscopy. The ${\mathrm…
The lattice dynamics of cubic BaTiO 3 and SrTiO 3 at different crystal lattice volumes were investigated using first-principles density functional theory calculation. The computational results indicate that the Ti–O and A–O (A = Sr or Ba) interactions are responsible for the unstable ferroelectric Γ 15 and antiferrodi…
A general and adaptable physicochemical model is presented to evaluate the mass transport within nanopores of mesoporous particles when the mass transport is coupled to heterogeneous kinetics occurring at active sites located onto the nanopore walls surface. The model framework encompasses almost all situations of pra…
We consider the dependence of the dynamics in nonpolar liquids as a function of pressure close to the glass transition. We show how dynamical heterogeneities lead naturally to a dependence of the dominant relaxation time τ α on two independent parameters, i.e., on both pressure P and temperature T or on both density ρ…
Abstract We investigated the effects of surface‐treated organophilic clay on the crystallization of poly( L ‐lactide) (PLLA) in their hybrids. The natural nano‐clay in PLLA/clay hybrids acts as a heterogeneous nucleating agent to facilitate crystallization. On the contrary, extensive distributions of induction periods…
We examine the published data concerning the shape of the current transients obtained by the time of flight (TOF) technique for molecularly doped polymers and polyvinylcarbazole (PVK) and compare it with the predictions from the existing theories of charge carrier transport in disordered organic solids. We show that T…
This work describes the design and assembly of multifunctional and cost-efficient composite fiber nonwovens as semi-occlusive wound dressings using a simple electrospinning process to incorporate a variety of functional components into an ultrathin fiber. These components include non-hydrophilic poly(L-lactide) (PLLA)…
The electrical and optical properties of CdO films post-annealed in hydrogen atmosphere for different durations (15 min, 30 min and 60 min) were studied. The prepared films were subjected to structural characterization by the x-ray diffraction method and optical characterization by the UV–VIS–NIR absorption spectrosco…
The rate of optical generation of electron--hole pairs inside a photosynthetic system can be greatly increased through conjugation with nanoparticles. The enhancement stems from much larger optical absorption cross section of a semiconductor nanoparticle compared to a photosynthetic system. In the hybrid complex, exci…
Electron beam induced deposition is among the most prospective methods for size- and position-controllable nanofabrication of three-dimensional structures. Direct-write maskless nanostructure fabrication was performed with a scanning electron microscope. Three-dimensional iron structures were obtained by locally confi…
Unlike Gd 6 Co 5/3 Si 3, which is obtained as a single phase after melting of the constituents, annealing under vacuum at 1073 K for 1 month is necessary to prepare the new ternary silicide Gd 6 Ni 5/3 Si 3 . Indeed, after melting, this alloy is a mixture containing mainly Gd 3 NiSi 2 and Gd 5 Si 3 . These two compoun…
One strategy in vascular tissue engineering is the design of hybrid vascular substitutes where vascular cells infiltrate biostable porous scaffolds that provides favorable environment for guided cell repopulation and acts as a mechanically supporting layer after the tissue regeneration process. The aim of the present…