Materials Literature
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Liquid crystalline polymer stabilized blue phases (PSBPs) are candidate materials for next generation electro-optic switching devices because they form a self-organized three-dimensional periodic structure and exhibit a fast response time of submillisecond order. Considering the crystallographic structures of PSBPs, i…
In the present work, we consider polydispersity effects on a mixed polymer brush. Two types of polymer chains with different solvent selectivity being densely grafted together onto an impenetrable surface are forming a binary mixed polymer brush. Using a numerical quasi off-lattice self-consistent field method for het…
Abstract Solid oxide fuel cells with Ni‐MnO/yttria‐stabilized‐zirconia (YSZ) tricomposite anode supports were fabricated with different MnO concentrations, and the coking tolerances and catalytic activities were investigated in wet CH 4 atmosphere. Ni 0.9 (MnO) 0.1 /YSZ (10MnO) anode support cell exhibited a maximum p…
Structural arrays with nanoscale spacing arise in many device concepts. Carbon nanotube transistors are an extreme example, where a practical technology will require arrays of parallel nanotubes with spacing of order 10 nm or less. We show that with decreasing pitch there is a first-order transition, from a robust str…
Phase-change access memory (PCM) appears to be the strongest candidate for next-generation high-density nonvolatile memory. The fabrication of ultrahigh-density PCM depends heavily on the thin-film growth technique for the phase-changing chalcogenide material. In this study, Ge2Sb2Te5 (GST) and GeSb8Te thin films were…
We review different electron transport methods to probe the magnetic properties, such as the magnetic anisotropy, of an individual Fe4 SMM. The different approaches comprise first and higher order transport through the molecule. Gate spectroscopy, focusing on the charge degeneracy-point, is presented as a robust techn…
The relationship between charge-density wave (CDW) orders and superconductivity in arsenide superconductor ${\text{SrPt}}_{2}{\text{As}}_{2}$ with ${T}_{c}=5.2\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ which crystallizes in the ${\text{CaBe}}_{2}{\text{Ge}}_{2}$-type structure was studied by ${}^{75}\text{As}$ nuclear ma…
This review describes in brief the historical perspective of photochromism and photochromic behaviour of ‘Anils’. This phenomenon among ‘Anils’ is exhibited due to the tautomerism between enol and keto form via six membered hydrogen transfer between the phenolic hydrogen and imine nitrogen and show the phenomenon of s…
We have demonstrated Au-Ag bimetallic non-alloy nanoparticles (BNNPs) on thin a-Si film and c-Si substrate for high SERS enhancement, low cost, high sensitivity and reproducible SERS substrate with bi-SERS sensing properties where two different SERS peak for Au NPs and Ag NPs are observed on single SERS substrate. The…
Charge dynamics in one-dimensional (1D) Mott insulators was investigated by femtosecond pump-probe absorption spectroscopy on ${\mathrm{Ca}}_{2}{\mathrm{CuO}}_{3}$. An irradiation of a femtosecond laser pulse gives rise to a Drude-like response due to the nature of spin-charge separation characteristic of 1D Mott insu…
Chirality's effects on physical properties of materials and how chirality arises have persisted as attractive issues in chemistry. We prepared a homologous series of achiral liquid crystal trimers in which three phenylpyrimidine units are connected via flexible heptamethylene spacers. An equimolecular mixture of a tri…
Abstract Der heteronukleare Oxidcluster [Ga 2 Mg 2 O 5 ] .+ , der ein ungepaartes Elektron an einem verbrückenden Sauerstoffatom (O b .− ) besitzt, wurde mittels Fouriertransformations‐Ionenzyklotronresonanz‐Massenspektrometrie (FT‐ICR‐MS) auf seine Reaktivität gegenüber Methan und Ethan untersucht. In diesen Experime…
During a marine oil spill, the oil can interact with and potentially wet a variety of surfaces such as corals, skin/shells of marine animals, and bird feathers. We present both qualitative and quantitative data for the interaction of a dodecane droplet submerged in water with surfaces varying in both surface energy an…
A critical limitation that has hampered widespread application of the electrically conducting reduced graphene oxide ( r -GO) is its poor aqueous dispersibility. Here we outline a strategy to obtain water-dispersible conducting r -GO sheets, free of any stabilizing agents, by exploiting the fact that the kinetics of t…
The superconducting (SC) phase in phase-separated (PS) ${\mathrm{K}}_{0.8}\mathrm{F}{\mathrm{e}}_{1.6+x}\mathrm{S}{\mathrm{e}}_{2}\phantom{\rule{0.16em}{0ex}}(0\ensuremath{\le}x\ensuremath{\le}0.15)$ materials is found to crystallize on Archimedean solidlike frameworks, and this structural feature originates from a sp…
Abstract A new five‐year NEDO project on durability, on the basis of past two projects on SOFC durability/reliability, places an emphasis on simulation technologies to be utilized in comparison with measured long term stack behaviors and in prediction for 90,000 h durability. To extract true degradation issues, use is…
Abstract Layered perovskite oxide YBaCuCoO 5+x (YBCC) was synthesized by an EDTA‐citrate complexation process and was investigated as a novel cathode for proton‐conducting intermediate temperature solid oxide fuel cells (IT‐SOFCs). The thermal expansion coefficient (TEC) of YBCC was 15.3 × 10 −6 K −1 and the electrica…
In single-walled carbon nanotubes, electron-hole pairs form tightly bound excitons because of limited screening. These excitons display a variety of interactions and processes that could be exploited for applications in nanoscale photonics and optoelectronics. Here we report on optical pulse-train generation from indi…
We present a general study of the magnetic excitations within a weak-coupling five-orbital model relevant to itinerant iron pnictides. As a function of enhanced electronic correlations, the spin excitations in the symmetry-broken spin-density wave phase evolve from broad low-energy modes in the limit of weak interacti…
In this manuscript, we present a simple route to enhance upconversion (UC) emission by producing two different coordination sites of trivalent cations in a matrix material and adjusting crystal field asymmetry by Hf(4+) co-doping. A cubic phase, Y3.2Al0.32Yb0.4Er0.08F12, with these structural characteristics was synth…