Materials Literature
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Enhanced electron field emission (EFE) behavior was observed in ultrananocrystalline diamond (UNCD) and microcrystalline diamond (MCD) films upon irradiation with 100 MeV Ag9+-ions in a fluence of 5×1011 ions/cm2. Transmission electron microscopy indicated that while the overall crystallinity of these films remained e…
In order to investigate the properties of the field enhancement factor and emission current from a nanotube array, the local electric fields on an exact tip boundary of a carbon nanotube have been calculated. The field enhancement factor of a nanotube in free space is well described by the relation 0.7×l/r, where l an…
V-doped La0.67Ca0.33MnO3 (LCMO) thin films were prepared on fluorine-doped SnO2 (FTO) conducting glass substrates with a sol-gel technique. The resistance switching properties of Au/V:LCMO/FTO heterostructures investigated by electrochemical workstation showed reproducible resistive switching behaviors at room tempera…
A complete photovoltaic cell was fabricated using only a handheld airbrush, dilute solutions of CdSe and CdTe nanorods, commercially available silver paint, and transparent-conducting-electrode-coated glass. Produced and stored under ambient conditions, these fully functioning solar cells are stable for months. As a h…
Abstract Biodegradable heterografted molecular bottle brushes were prepared in two steps starting with a linear polyglycidol as a macroinitiator. First, ca. 45% of the polyglycidol hydroxy groups were grafted with ε ‐caprolactone via enzymatic catalysis. Selective end capping of the hydroxy groups at the graft ends wa…
A new tricompartmental acyclic ligand (H(4)L) was prepared and fully characterized. It reacts with zinc, nickel, and copper(II) acetate to yield [Zn(3)L(OAc)(2)].H(2)O (1.H(2)O), [Ni(3)L(OAc)(2)(MeOH)(2)].2MeCN.2MeOH (2.2MeCN.2MeOH), and [Cu(3)L(OAc)(2)].3H(2)O (3.3H(2)O), respectively. 2.2MeCN.2MeOH precipitates as s…
Structure and elastic properties of boron suboxide at high pressure have been investigated using generalized gradient approximation within the plane-wave pseudopotential density functional theory. The elastic constants are calculated using the finite strain method. The pressure dependences of lattice parameters, elast…
The propagation of guided waves in free standing (1 − x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 [PMN–xPT] (x = 0.29 or 0.33) single crystal plates has been studied theoretically. The polar directions are in the 111 family directions of the cubic reference coordinates but the crystals are being polarized along [0 0 1]c, [0 1 1]c and…
Since there are no such models in the literature, geometrical models for 2 × 2, 3 × 3, 4 × 4, and 5 × 5 rib fabrics are created in this paper. To obtain these models, the degree of widthwise curling for each fabric is assessed from photographs and the regions between the 1 × 1 rib parts and the curled plain knit parts…
Multiferroic composite thin films consisting of CoFe2O4 (CFO) and Pb(Zr0.52Ti0.48)O3 (PZT) layers were deposited through a combined route of rf magnetron sputtering and sol gel on Pt(111)/TiO2/SiO2/Si substrates. The coupling effects in the bilayered thin film were studied by looking at the relationships among the cry…
The site preference of Mn atoms in Heusler alloy Mn2NiSb can be influenced obviously by different preparing methods. Mn atoms enter the A and B sites after arc-melting and subsequent annealing, and form an Hg2CuTi-type of structure. However, after melt-spinning, the Mn atoms tend to occupy the (A, C) sites and form th…
The roles of oxygen pressure and thickness on the microstructure, electrical, and pyroelectric properties of Ba(Ti0.85Sn0.15)O3 (BTS) thin films have been studied. The highly (h00)-oriented BTS thin films were deposited on the SiO2/Si substrates with a LaNiO3 layer as the bottom electrode by pulsed laser deposition. I…
BiFeO 3 / Bi 3.15 Nd 0.85 Ti 3 O 12 (BFO/BNdT) multilayer films have been grown on Pt-coated silicon substrate by chemical solution deposition. Using Bi3.15Nd0.85Ti3O12 as an inducing layer, ferroelectric properties of BiFeO3 were enhanced significantly. The 2Pr and coercive electric field of the Pt/BFO/BNdT/Pt capaci…
Bulk dc resistivity and dielectric constant measurements at different temperatures and frequencies have been performed in LaMn 1− x Fe x O 3 (0 ⩽ x ⩽ 1.0) as a result of Fe substitution both for as-synthesized and oxygen annealed samples. Temperature dependence of the real part of the dielectric constant at different…
Zintl phases have recently been identified as potential thermoelectric materials typified by the discovery of a high thermoelectric figure of merit in the Yb14MnSb11 compound above 1000 K. We report on the synthesis and the thermoelectric properties measurements over a wide temperature range (300–1000 K) of other Zint…
The electronic structure of the ferroelectric Sn 2 P 2 S 6 single crystal is studied by X-ray photoelectron spectroscopy in both paraelectric and ferroelectric phases. The spectra were measured with monochromatized Al Kα radiation in the energy range 0–1400 eV. Experimental energies are compared with the results of th…
We formulate a theory of transport in graphene bilayers in the weak momentum scattering regime in such a way as to take into account contributions to the electrical conductivity to leading and next-to-leading order in the scattering potential. The response of bilayers to an electric field cannot be regarded as a sum o…
Mechanical and thermodynamic stability of the isoelectronic ternary inverse perovskites ${\text{Sc}}_{3}\text{EN}$ $(E=\text{B},\text{Al},\text{Ga},\text{In})$ has been studied from first principles. We confirm stability of recently synthesized cubic phases ${\text{Sc}}_{3}\text{AlN}$ and ${\text{Sc}}_{3}\text{InN}$,…
We simulated the metamaterial absorbers in two propagation conditions and observed the universal phenomenon of strong non-reciprocity. It is found that this non-reciprocity cannot be well interpreted using the effective medium theory, which indicates that the designing and understanding for the metamaterial absorber b…
One of the key technologies to evolve in the displays market in recent years is liquid crystal over silicon (LCOS) microdisplays. Traditional LCOS devices and applications such as rear projection televisions, have been based on intensity modulation electro-optical effects, however, recent developments have shown that…