Materials Literature
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Using chemical-state-specific scanned-energy-mode photoelectron diffraction (PhD) from O 1s and C 1s photoemission, we have determined the local structure of the surface species produced on the rutile TiO 2 (110) surface as a result of room temperature exposure to formic acid. The results show clear evidence for the c…
In this study, highly permeable ion-selective membranes are prepared via immobilization of polyelectrolyte multilayer networks within the inner pore structure of a microporous (pore size = 0.2 microm) support. Electrostatic layer-by-layer assembly is achieved through alternate adsorption of cationic and anionic polyel…
The highly electron-deficient, beta-octafluorinated meso-tetrakis(pentafluorophenyl)-porphyrin (H(2)F(28)TPP) was metalated with platinum to afford the oxidatively robust luminophore [PtF(28)TPP], and its X-ray structure shows that the porphyrin core exists in a slightly saddle-shaped conformation. The absorption spec…
The structure of vaterite-type rare earth orthoborate (LnBO 3 ) has long been a subject of interest and controversy. In the present work, the crystal structures of two polymorphs of the vaterite-type rare earth orthoborates, i.e., the low- and high-temperature modifications of (Y 0.92 Er 0.08 )BO 3, were solved and re…
We study inelastic electron tunneling through a molecular junction using the non-equilibrium Green function (NEGF) formalism. The effect of the mutual influence between the phonon and the electron subsystems on the electron tunneling process is considered within a general self-consistent scheme. Results of this calcul…
A growing need for low stress high temperature thick film materials has prompted the development of new spin-coatable photopatternable silicones (Dow Corning WL-5000 series) to assist manufactures in building the next generation of electronic devices. These new negative-tone materials can be easily coated onto electro…
The effect of C co-doping on the Tb3+ luminescence from Tb-doped silicon-rich silicon oxide (SRSO) films is investigated. Tb-doped SRSO films co-doped with C (SRSO:C) were deposited by electron cyclotron resonance plasma-enhanced chemical vapor deposition. The Tb3+ photoluminescence intensity is enhanced by the presen…
We report a new mechanism on the dynamics of correlated electrons in simple metal clusters which manifests by a strong electron temperature dependence of the surface plasmon resonance spectral profile. This effect is revealed thanks to a theoretical approach based on the time-dependent local-density approximation at f…
We show how the low-frequency dependence of the proton spin-lattice relaxation time T1(nu) of octylcyanobiphenyl liquid crystals confined in high-density silica gels evidences a long-range order nematic phase in spite of the strong confinement and random disorder of the gels. The universal value and frequency dependen…
Pr 2 Fe 14 B /α- Fe based nanocomposites have been prepared through crystallization of melt-spun amorphous Pr7Tb1Fe85Nb0.5Zr0.5B6 ribbons by means of ac Joule heating while simultaneously monitoring room-temperature electrical resistance R. The R value shows a strong variation with respect to applied current I, and is…
The TM1287 gene of Thermotoga maritima encodes a conserved hypothetical protein with a molecular weight of 13,138 Da (residues 1–121) and a calculated isoelectric point of 5.6. Currently, no functional annotation has been made for this protein. Here, we report the crystal structure of TM1287 in complex with an endogen…
A beam of light that is incoherent to the recording beams and has its polarization orthogonal to the recording beams is shown to assist the recording process of azo-functionalized polymers through the enhancement of trans–cis–trans cycling. Recording with s:s polarization has earlier been shown to result in very small…
We report a molecular dynamics simulation study of the properties of the potential energy landscape sampled by a system of water molecules during the process of generating a glass by cooling, and during the process of regenerating the equilibrium liquid by heating the glass. We study the dependence of these processes…
RATIONALE AND OBJECTIVE: This clinical trial examined the pharmacokinetics of gadoversetamide, a magnetic resonance imaging contrast agent, in normal pediatric subjects. MATERIALS AND METHODS: Seventeen healthy pediatric subjects received a single intravenous injection of gadoversetamide (0.1 mmol/kg, 0.2 mL/kg). Sixt…
We have investigated the potential of mean force between two nanoparticles that are surrounded by a symmetric diblock copolymer matrix. The hard nanoparticles are modeled as attractive to one kind of polymer. Using self-consistent-field theory (SCFT), we analyze the energy change of the system when the distance betwee…
Electrostatic tuning: Parallel β-sheet assemblies at interfaces were obtained via designed complementary electrostatic interactions. A system composed of an equimolar mixture of two amphiphilic peptides PA (see picture) and PB, which are identical in sequence but for the two amino acids, lysine and glutamic acid, reve…
Ferromagnetic Co-doped rutile TiO2 single crystals were synthesized by high-temperature ion implantation and characterized by a variety of techniques. Co is uniformly distributed to a depth of ∼300 nm with an average concentration of ∼2 at. %, except in the near-surface region, where the concentration is ∼3 at. %. Fer…
The spatial correlation functions of the thermal fluctuations in systems with smoothly varying structure are calculated by means of the WKB method. As a particular physical problem we consider the behavior of director fluctuations in cholesteric liquid crystals possessing one-dimensional spatial periodicity. The probl…
The grain boundary (GB) of nanocrystalline ZnO films is investigated using the x-ray absorption fine structure technique. With the advantage of the dominant GB volume fraction in our samples, the GB structure is found to be neither simply “gas-like” nor “similar to that of coarse-grained phase,” but experiences a tran…
The pseudocubic lattice parameter of lanthanum molybdate, La 2 Mo 2 O 9 , has been measured as a function of temperature between 13 and 1100 K. These data show an anomaly at 842 K, associated with the alpha (pseudocubic monoclinic, non-conducting) to beta (cubic, conducting) phase transition. For a sample which has be…