Materials Literature
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We fabricated ${\mathrm{Fe}}_{3\ensuremath{-}x}{M}_{x}{\mathrm{O}}_{4}$ $(M=\mathrm{Mn},\mathrm{Zn})$ thin film by pulsed laser deposition technique and investigated their electronic structure by hard x-ray photoemission spectroscopy (HX-PES) and x-ray magnetic circular dichroism (XMCD). HX-PES and XMCD revealed that…
We have investigated the ultrafast spin and charge dynamics in the course of a photoinduced phase transition from an insulator with short-range charge order and orbital order (OO) to a ferromagnetic metal in perovskite-type Gd0.55Sr0.45MnO3. Transient reflectivity changes suggest that the metallic state is formed just…
The synthesis and liquid crystalline behavior of peptide nanowire is presented. An aromatic dipeptide rapidly assembles into robust one-dimensional nanowires having a large aspect ratio in a volatile organic solvent. The stable dispersion of rigid nanowires shows a colloidal nematic liquid crystalline phase over a bro…
By introducing different long rigid ligands into polyoxometalate (POM) systems, four novel inorganic–organic hybrids containing multitrack Cu−N coordination polymeric chain-modified POMs, {[Cu(4,4′-bipy)] 3 [HGeMo 12 O 40 ]}·0.5H 2 O ( 1 ), [Cu(4,4′-bipy)]{[Cu(4,4′-bipy)] 2 [W 6 O 19 ]}·4H 2 O ( 2 ) (bipy = bipyridine…
We studied the influence of silver nanoparticles (NPs) in the luminescence properties of TeO2–PbO–GeO2 glass doped with trivalent praseodymium (Pr3+) ions. The experiments were performed with samples containing different concentrations of NPs controlled by heat treatment of the glass. The enhancement of the Stokes lum…
The hybrid diamond-graphite nanowires with lengths up to a few hundred nanometers have been identified as structural units in UNCD films synthesized by chemical vapor deposition with nitrogen gas added. This hybrid material consist of a single crystalline diamond core of 5–6 nm in diameter oriented along the [110] pri…
One-dimensional (1D) Cu(OH) 2 nanowires are converted into to two-dimensional (2D) CuO nanoleaves on a large scale, in which hierarchical-oriented attachment is involved. The whole transition process is captured and studied with the assistance of transmission electron microscopy (TEM) and high-resolution TEM images. P…
By a stepwise growth process, an axial-fan-like and high-nuclearity [Gd 6 Cu 12 ] cluster compound ( 1 ) was obtained, in which six [Cu 2 ] blade fragments encapsulate a “hollow” [Gd 6 (μ 3 -OH) 8 ] octahedral core. Without the support of a centered μ 6 -O ligand for the octahedral core, its mean Gd−μ 3 -O−Gd bridging…
We recently demonstrated a new process for the formation of partially spherical structures as an omnidirectional antireflection coating (omni-AR). In this paper, we report the simulation results of the angular and spectral dependences of the total reflectivity on various microstructured surfaces based on the rigorous…
TiFe x Co 1 − x Sb half-Heusler materials with randomly distributed TiO2 particles have been synthesized by arc melting and annealing. Thermoelectric properties were measured in the temperature range of ∼300–850 K. TiCoSb shows n-type conduction, while TiFexCo1−xSb transfers to p-type conduction when x≥0.01. The elect…
We show both gas pressure and species sensing capabilities based on the electrothermal effect of a multiwalled carbon nanotube (MWCNT). Upon exposure to gaseous environments, the resistance of a heated MWCNT is found to change following the conductive heat-transfer variances of gas molecules. To realize this mechanism…
Silver core/silica shell (Ag@SiO2) nanoprisms are prepared by passivating silver nanoprism cores with 16-mercaptohexadecanoic acid (MHA), which prevents their etching and aggregation during the subsequent silica coating reaction. The resulting triangular Ag@SiO2 nanoprisms can be dispersed in organic media, environmen…
It is shown that the electron scattering by static defects, acoustic or optical phonons in quantum wells subjected to an in-plane magnetic field is asymmetric. The probability of scattering contains terms which are proportional to both the electron wave vector and the magnetic field components. The terms under study a…
We present a theoretical study on the behavior under pressure of the two hypothetical C$_{46}$ and Li$_8$C$_{46}$ type-I carbon clathrates in order to bring new informations concerning their synthesis. Using \textit{ab initio} calculations, we have explored the energetic and structural properties under pressure of the…
The Kubo formula is used to calculate the spin-Hall conductivity in a spin-polarized two-dimensional electron system with Rashba-type spin-orbit interaction. As in the case of the unpolarized electron system, spin Hall conductivity is entirely determined by states at the Fermi level, a property that persists in the pr…
Using low energy electron microscopy we observe that Pd deposited on Ru only attaches to small sections of the atomic step edges surrounding Pd islands. This causes a novel epitaxial growth mode in which islands advance in a snakelike motion, giving rise to labyrinthine patterns. Based on density functional theory tog…
Based on first-principles density functional theory calculations, we explore the electronic and magnetic properties of experimentally producible sandwiches and infinite wires made of repeating benzene molecules and transition-metal atoms of V, Nb, and Ta. We describe the bonding mechanism in the molecules and in parti…
Charge-ordered rare earth manganites Nd0.5Ca0.5MnO3, La0.25Nd0.25Ca0.5MnO3, Pr0.7Ca0.3MnO3 and Pr0.6Ca0.4MnO3 are found to exhibit dielectric constant anomalies around the charge-ordering or the magnetic transition temperatures. Magnetic fields have a marked effect on the dielectric properties, indicating the presence…
The finite size effect on the antiferromagnetic transition temperature, TN, has been investigated with Co3O4 nanoparticles of 75, 35, and 16 nm in diameter. Along with the results from the previous experiments on the Co3O4 nanoparticles with average diameter of 8 and 4.3 nm, the variation of TN with the particle diame…
Protein resistance of self-assembled monolayers (SAMs) of hexa(ethylene glycols) (EG(6)) has previously been shown to be dependent on the alkoxyl end-group termination of the SAM, which determines wettability [S. Herrwerth, W. Eck, S. Reinhardt, and M. Grunze, J. Am. Chem. Soc. 125, 9359 (2003)]. In the present study,…