Materials Literature
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Abstract The development of green sustainable energy to control our carbon‐based energy “addiction” and to reduce atmospheric CO 2 emissions is one of the most urgent issues regarding the continued existence of man on planet earth. Among renewable energy resources, solar energy is by far the largest exploitable resour…
Near-infrared imaging and vibrational Raman scattering have been used to measure the susceptibility of Ni-based cermet anodes to carbon formation in solid oxide fuel cells (SOFCs) operating with methane and methanol fuels at 715 °C. These two complementary optical methods afford previously unavailable opportunities to…
Pressed Bi nanocrystals synthesized by a simple colloidal method exhibited very high electrical conductivity of 104–105 S m−1 and extremely low thermal conductivity of 0.35 W m−1 K−1. The synthetic method can be used for the inexpensive preparation of highly efficient thermoelectric materials by engineering the size o…
We report results of microwave surface impedance measurements of LiFeAs single crystals. The in-plane penetration depth depends on temperature exponentially at low temperatures, which strongly suggests that this material has the nodeless superconducting gap. The temperature dependence of the superfluid density indicat…
Nanoparticulate drug-delivery systems have attained much importance because of their injectable property, the possibility to achieve passive targeting and active targeting, and unique advantages to realize stimuli tailored delivery. Molecular self-assembly is a powerful method for fabricating polymer-based nanoparticl…
Two novel dysprosium(III) clusters have been prepared and structurally characterized. One has a tetranuclear core with a rare zigzag arrangement, and the other is an unprecedented octanuclear cluster with six triangular Dy(3) units sharing vertices. Both dysprosium(III) clusters possess frequency-dependent on alternat…
The thermal properties of freely suspended GaAs nanowires are investigated by applying a method which relies on laser heating and the determination of the local temperature by Raman spectroscopy. In order to determine the values for the thermal conductivity κ, the fraction of the laser power absorbed inside the GaAs n…
Sticky fingers: The emission intensity of modified pyrimidines containing an aryl moiety, linked by a single bond to the nucleobase in the 5-position, show a remarkable sensitivity to sample viscosity (see picture), a trait typical for chromophores bearing a molecular rotor element.
There has been recent controversy whether the response seen in carbon nanotube (CNT) chemiresistors is associated with a change in the resistance of the individual nanotubes or changes in the resistance of the junctions. In this study, we carry out a network analysis to understand the relative contributions of the nan…
Recently, rare earth (RE) ion-doped CeO 2 has attracted much attention for special optical, magnetic, and catalytic properties. First reported in this paper is a facile electrochemical synthesis of Eu 3+ -doped CeO 2 nanobelts with greatly improved optical properties. The synthesized Eu 3+ -doped CeO 2 nanobelts were…
The irreversible photoenhancement of a quantum dot (QD) nanocomposite is demonstrated using UV photo-annealing. The QD nanocomposite consists of a mixture of thermally curable polymer and a QD, which is synthesized as a core/multishell nanocrystal, CdSe/CdS/CdZnS/ZnS. Exposure under 365-nm UV illumination for 30 min a…
Epitaxial strain can be efficiently used to modify the properties of ferroelectric thin films. From the experimental viewpoint, the challenge is to fine-tune the magnitude of the strain. We illustrate here how, by using a suitable combination of composition and substrate, the magnitude of the epitaxial strain can be c…
Current-driven magnetic domain wall motion is demonstrated in the quaternary ferromagnetic semiconductor (Ga,Mn)(As,P) at temperatures well below the ferromagnetic transition temperature, with critical currents of the order 105 A cm−2. This is enabled by a much weaker domain wall pinning compared to (Ga,Mn)As layers g…
Work together: Bifunctional catalysis using homogeneous acid and base affords neutralization in the same reactor, however the recovery, reuse, and handling of such homogenous reagents is difficult. The recent progress in the state-of-the-art synthesis methods for the development of heterogeneous acid–base bifunctional…
We propose lyotropic chromonic liquid crystals (LCLCs) as a distinct class of materials for organic electronics. In water, the chromonic molecules stack on top of each other into elongated aggregates that form orientationally ordered phases. The aligned aggregated structure is preserved when the material is deposited…
The structural inversion asymmetry-induced spin-orbit interaction of conduction band electrons in zinc-blende and wurtzite semiconductor structures is analysed allowing for a three-dimensional (3D) character of the external electric field and variation of the chemical composition. The interaction, taking into account…
Working in the crystal-momentum representation, we calculate the optical conductivity of noncentrosymmetric insulating crystals at first order in the wave vector of light. The time-even part of this tensor describes natural optical activity and the time-odd part describes nonreciprocal effects such as gyrotropic biref…
This Comment points out a number of errors in the recent paper by Zarechnaya, Dubrovinskaia, Dubrovinsky, et al. (Phys. Rev. Lett. 102, 185501 (2009)). Results and conclusions presented by Zarechnaya et al. (2009) are either incorrect or have been presented before.
The electronic structure of the molecular compound (TTM-TTP)I_3, which exhibits a peculiar intra-molecular charge ordering, has been studied using multi-configuration ab initio calculations. First we derive an effective Hubbard-type model based on the molecular orbitals (MOs) of TTM-TTP; we set up a two-orbital Hamilt…
The comment of Dubrovinskaia et al. is scientifically flawed. The high-pressure form of boron, discovered by Oganov et al., is indeed new and its bonding has a significant ionic character, as demonstrated in Ref. 1.