Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The dispersion characteristics of asymmetric double-negative material slab waveguides have been investigated by using normalized parameters. The results show that the dispersion characteristics of these material waveguides differ dramatically from conventional guided waves, and they possess a number of unusual propert…
Abstract The surfaces of various mechanical pulp fibres, including thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), and alkaline peroxide mechanical pulp (APMP) fibres, were characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), and X‐ray photoelectron spectroscopy (XPS).…
Abstract This issue's Editor's Choice [1] reviews electronic and optical properties of various widegap oxychalcogenides which are connected to their crystal structures. Two examples are shown in the cover picture: Ln CuO Ch ( Ln = lanthanide, Ch = chalcogen, left) and La 2 CdO 2 Se 2 (right). These oxychalcogenides ha…
Electronic properties of single-walled carbon nanotubes intercalated with lithium are investigated by NMR. $^{13}\mathrm{C}$ NMR experiments reveal a metallic ground state for all of the following stoichiometries ${\mathrm{LiC}}_{x}$ with $x=10$, 7, and 6. A continuous increase of the density of states at the Fermi le…
The interaction forces between nanoscale colloidal particles coated with end-grafted Lennard-Jones homopolymers are calculated using off-lattice Monte Carlo simulations in the NVT ensemble. The focus of this work is on grafted polymers that are of approximately the same size as the nanoparticle, a regime intermediate…
Abstract This article describes progress towards producing prototype magnetoelectronic structures based on III–N semiconductor materials. We focus on the materials properties connected with the key physical phenomena underlying potential spintronic devices: producing, injecting, transporting, manipulating and detectin…
Abstract The electronic structures of the ternary thallium chalcogenide compounds, TlGaSe 2 and TlGaS 2 are studied, using the linear muffin‐tin orbital (LMTO) method. The calculated band dispersion shows that both compounds are indirect gap semiconductors. For both compounds, the top of the valence bands is located a…
We study the motion of two colloidal (‘probe’) particles translating along their line of centres with fixed, equal velocities in an otherwise quiescent colloidal dispersion. The moving probes drive the microstructure of the dispersion out of equilibrium; resisting this is the Brownian diffusion of the dispersion ‘bath…
We have investigated nanoscale compositional and structural variations in Ce(0.5)Zr(0.5)O(2) samples with different redox properties. Different samples were prepared using a spray freezing technique, and the synthesis conditions were varied to yield materials with reduction temperatures in the range of 400-750 degrees…
Using quantitative fluorescence microscopy in conjunction with a method of gradient substrate assembly established in their group, the authors were able to introduce and measure reproducible changes in cellular morphology and cell density by manipulating polymer grafting density. The mechanism behind this change in ce…
Abstract Electronic and optical properties of widegap oxychalcogenides, LaCuO Ch ( Ch = chalcogen) and La 2 CdO 2 Se 2 , are reviewed with a focus on those relevant to their layered crystal structures, including high hole mobility, degenerate p‐type conduction, room temperature exciton, and large third order optical n…
The dynamics of water (${\mathrm{H}}_{2}\mathrm{O}$ and ${\mathrm{D}}_{2}\mathrm{O}$) molecules adsorbed inside single-wall carbon nanotubes (SWCNTs) of average diameter $13.5\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$ were investigated by means of $^{2}\mathrm{H}$- and $^{1}\mathrm{H}$-NMR between 100 and $300\phantom…
We evaluated enthalpies of formation and formation energies of neutral vacancies in KNbO3 and KTaO3 using a plane-wave pseudopotential method within a density functional formalism. The KNbO3 (R 3mR ) phase with the lowest symmetry was found to have the lowest enthalpy of formation. On the other hand, the various virtu…
Motivated by recent structural data questioning the adequacy of the charge order (CO) or disorder picture for the Verwey transition (at $T={T}_{V}$) in magnetite, we reinvestigate this issue within a new theoretical picture. Using the local density $\text{approximation}+\text{dynamical}$ mean-field theory ($\mathrm{LD…
A great deal of information on the efficiency of gypsum or phosphogypsum to ameliorate acidity in highly weathered soils is available, but only limited information is available on the efficiency in acid Andosols, which possess large amounts of active aluminum (Al). We examined the effectiveness of gypsum application t…
Abstract ZnO 1– x S x films in the whole composition range were deposited by radio‐frequency reactive sputtering on different substrates. Raman measurements verified that the LO phonon of ZnO shifts towards lower frequencies as a function of the S content in the alloyed films. The composition dependence of the band ga…
We consider a semi-infinite nematic in contact with a periodic patterned surface with alternate planar and homeotropic stripes. Extending the work of Barbero, we find the free energy (assuming K1 = K3) for the situations where the easy direction on the planar stripe is either perpendicular or parallel to the length of…
Abstract Magnetic and dielectric properties of the ruthenium double perovskites La 2 MRuO 6 (M = Mg, Co, Ni, and Zn) were investigated. The magnetization measurements for M = Co and Ni showed the existence of magnetic order at 20–30 K. Though the oxides with M = Zn and Mg exhibit a deviation from the Curie–Weiss law,…
We presented a detailed study on the electronic structure and optical properties of cupric azide (Cu(N(3))(2)), mercuric azide (alpha-Hg(N(3))(2)), and lead azide (alpha-Pb(N(3))(2)) by using density functional theory within the generalized gradient approximation. Relaxed crystal structures compare well with experimen…
In this paper, we characterize the rotational dynamics and observe rotor-rotor interactions within a crystalline, three-dimensional array of dipolar molecular rotors. The rotating portion of each rotor molecule consists of a dipolar fluorine-substituted phenyl group. The phenyl rotors are connected by acetylene linkag…