Materials Literature
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The size-dependent saturation magnetization M s ( D ) of ferromagnetic and ferrimagnetic nanocrystals at room temperature, without free parameters, has been predicted in terms of a size-dependent cohesive energy model, where D denotes the diameter of nanoparticles or the thickness of thin films. The given M s ( D ) fu…
Abstract Novel hierarchical ZnO nanostructures, porous ZnO nanobelts, and nanoparticle chains are prepared from a precursor of synthetic bilayered basic zinc acetate (BLBZA) nanobelts. BLBZA nanobelts are obtained by a simple synthetic route under mild conditions. X‐ray diffraction, scanning electron microscopy, trans…
We used covalent attachments to single-walled carbon nanotubes (SWNTs) to fabricate single-molecule electronic devices. The technique does not rely on submicrometer lithography or precision mechanical manipulation, but instead uses circuit conductance to monitor and control covalent attachment to an electrically conne…
Room-temperature ferromagnetism (FM) has been observed in laser-ablated ZnO thin films. The FM in this type of compound does not stem from oxygen vacancies as in the case of TiO 2 and HfO 2 films, but from defects on Zn sites. Magnetization of very thin films is much larger than that of the thicker films, showing that…
A cerious contender: The catalytic activity in the water gas shift reaction of Au and Cu nanoparticles supported on CeO2(111) is superior to that of these nanoparticles on a ZnO(000) support or of the bulk metals (the diagram shows the results depending on the Au nanoparticle coverage). These results illustrate the es…
Recent progress in terahertz biosensors based on artificial electromagnetic subwavelength structure,
A Reply to the Comment by Ladislav Kavan et al..Received 15 September 2006DOI:https://doi.org/10.1103/PhysRevLett.98.019702©2007 American Physical Society
A method for building the phase diagram of syndiotactic polypropylene in stretched fibers as a function of stereoregularity, degree of deformation, and temperature is reported. The method is based on the analysis of the X-ray fiber diffraction patterns of samples of different stereoregularity, prepared with different…
An FE-based physical phase variable model is proposed for PM machines under stator short-circuit faults. The parameters of the proposed model, inductances and back EMFs are determined using the FE-circuit coupled computation of the machine under the same type of fault. The parameters obtained include information on th…
The polymer reference interaction site model theory is used to investigate the radial distribution function, potential of mean force, depletion force, and second virial coefficient in star polymer nanocomposite melts. The contact aggregation of nanoparticles for relatively weak nanoparticle-monomer attraction and the…
Abstract Nontoxic and biodegradable poly(ϵ‐caprolactone)‐ b ‐poly(ethylene glycol)‐ b ‐poly(ϵ‐caprolactone) triblock copolymers were synthesized by the solution polymerization of ϵ‐caprolactone in the presence of poly(ethylene glycol). The chemical structure of the resulting triblock copolymer was characterized with 1…
The authors report Brownian dynamics simulation of the out-of-equilibrium dynamics (aging) in a colloidal suspension composed of rigid charged disks, one possible model for Laponite, a synthetic clay deeply investigated in the last few years by means of various experimental techniques. At variance with previous numeri…
The orientational behavior of a thermotropic poly(ether ester), PH31B32, with biphenyl units as mesogens and spacers with methyl substituents, has been analyzed. This polymer is one of the few mesophase-forming systems where the amorphous phase can be easily quenched from the isotropic melt. Moreover, under certain co…
Abstract Four ligands, which can be considered as di‐ [both symmetric (L 1 ) and asymmetric (L 2 )], tri‐ (L 3 ), and tetraacetate (L 4 ) derivatives of bis(aminomethyl)phosphinic acid (L 0 ) have been synthesized and their complexation equilibria involving Mg 2+ , Ca 2+ , Ni 2+ , Cu 2+ , Zn 2+ , Cd 2+ , and Pb 2+ hav…
Direct current (DC) flowing through the earthed neutrals of transformer windings causes a DC component in the magnetising current. Owing to non-linearity, the waveform of this current is strongly distorted. A method based on the finite element analysis of a transformer is presented that is capable of predicting the wa…
The magnetism and structure for potassium clusters physisorbed in nanographite-based nanoporous host are investigated. Potassium clusters are subjected to a slight charge transfer to a host nanographite and modify the magnetism of the edge-state spins of nanographite. The localized spins of 4s electrons in the potassi…
Boron strongly modifies electronic and diffusion properties of graphite. We report the first ab initio study of boron interaction with the point defects in graphite, which includes structures, thermodynamics, and diffusion. A number of possible diffusion mechanisms of boron in graphite are suggested. We conclude that…
The influence of clay surface modification on the polymorphism behavior of poly(ethylene naphthalate) (PEN)/clay nanocomposites was investigated via in situ Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction. The results show that untreated clay has a heterogeneous nucleating effect on PEN and favors…
We have investigated the reentrant ferroelectric behavior of ${\mathrm{TbMnO}}_{3}$ under a $c$-axis-aligned magnetic field $(H\ensuremath{\parallel}c)$ using neutron and x-ray single-crystal diffraction. We find that below ${T}_{N}=41\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ and at high field the incommensurate ordering…
For the photomodulation of the collagen triple helix with an azobenzene clamp, we investigated various collagenous peptides consisting of ideal (Gly-Pro-Hyp) repeats and containing cysteine residues in various positions for a side chain-to-side chain crosslink with a suitable chromophore derivative. Comparative confor…