Materials Literature
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ZnO films were prepared on p-Si (111) substrates by using atomic layer deposition. High-resolution x-ray diffraction (XRD), scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and I-V measurements were carried out to characterize structural, electrical, and optical prope…
Abstract In situ synchrotron wide‐angle X‐ray scattering (WAXS) and ultra‐small angle X‐ray scattering (USAXS) were used to study the growth of Pd nanodendrites and quasi‐spherical Pd nanoparticles. The metal–ligand environments of both the precursors and growing nanoparticles contribute to nanostructure formation. Sp…
This paper compares the morphologies of films of conjugated polymers in which the backbone (main chain) and pendant groups are varied between ionic/hydrophilic and aliphatic/hydrophobic. We observe that conjugated polymers in which the pendant groups and backbone are matched, either ionic-ionic or hydrophobic-hydropho…
We present the Raman scattering spectra of the ${\mathrm{BaFe}}_{2}{\mathrm{X}}_{3}\phantom{\rule{0.28em}{0ex}}(\mathrm{X}\phantom{\rule{0.28em}{0ex}}=\phantom{\rule{0.28em}{0ex}}\mathrm{S},\phantom{\rule{0.28em}{0ex}}\mathrm{Se})$ compounds in a temperature range between 20 and 400 K. Although the crystal structures…
Ti–Ta based alloys are an interesting class of high‐temperature shape memory materials. When fabricated as thin films, they can be used as high‐temperature micro‐actuators with operation temperatures exceeding 100 °C. In this study, microstructure, shape memory effect and thermal cycling stability of room‐temperature…
Abstract Compounds Mg 8– x M x (BN 2 ) 2 N 4 were prepared by solid‐state reaction of MgCl 2 , Li 3 (BN 2 ), and AlN for M = Al, and of Mg 3 N 2 , BN, and Si 3 N 4 for M = Si. Their crystal structures were refined from powder X‐ray diffraction data with the space group R m for M = Al, Si, and P2 1 / c for M = Si. The…
Abstract The crystal structure of a protonated phthalocyaninato–porphyrinato Tb(III) double-decker complex, [Tb(TPP)(HPc)] (1) (TPP: 5,10,15,20-tetraphenylporphyrin, Pc: phthalocyanine), was determined. Crystal structure analysis demonstrated that the proton exists on the meso-nitrogen of the phthalocyanine ligand, an…
An effective resistive Joule heating approach was conducted to improve the electrical actuation and shape-recovery performance of a shape memory polymer (SMP) nanocomposite. Two types of gold (Au) film patterns were deposited to be used as electrodes to drive thermal-responsive SMPs and achieve a uniform temperature d…
The spin-fluctuation mechanism of superconductivity usually results in the presence of gapless or nodal quasiparticle states in the excitation spectrum. Nodal quasiparticle states are well established in copper-oxide, and heavy-fermion superconductors, but not in iron-based superconductors. Here, we study the pairing…
Summary Magnesium dihydroxide (MDH) was evaluated as char promoter into different polymers exhibiting various chemical structures. Char promotion was characterized using thermogravimetric analysis and pyrolysis‐combustion flow calorimetry. Gases released during pyrolysis were identified using pyrolysis coupled gas chr…
Abstract The magnetoresistance and electrical resistivity of nitrogen‐doped multi‐walled carbon nanotubes (N‐MWCNTs) were studied in the temperature range of 1.6–100.3 and 1.6–286 K, respectively, using a standard four‐probe technique. The possible mechanisms of the observed effects are discussed in detail.
In eukaryotes, NAD(+)-dependent isocitrate dehydrogenase (IDH) is strictly mitochondrial and is a key enzyme in the Krebs cycle. To date, all known NAD(+)-specific IDHs (NAD-IDHs) in the mitochondria are believed to be heteromeric in solution. Here, a unique homodimeric NAD-IDH from Ostreococcus tauri (OtIDH), the sma…
Despite the bright and tuneable photoluminescence (PL) of semiconductor quantum dots (QDs), the PL instability induced by Auger recombination and oxidation poses a major challenge in single-molecule applications of QDs. The incomplete information about Auger recombination and oxidation is an obstacle in the resolution…
ABSTRACT Flurbiprofen axetil (FA)‐loaded coaxial electrospun poly(vinyl pyrrolidone) (PVP)–nanopoly(lactic‐ co ‐glycolic acid) core–shell composite nanofibers were successfully fabricated by a facile coaxial electrospinning, and an electrospun drug‐loaded system was formed for anti‐adhesion applications. The FA, which…
AIM: Development of highly sensitive diagnostic nanoprobe for cancer imaging based on surface-enhanced Raman scattering (SERS) platform. MATERIALS & METHODS: Synthesis of novel squaraine dyes as a Raman signature molecule denoted as lipoic-squaraine-lipoic (LSL), propyl-squaraine-lipoic (PSL) and propyl-squaraine-prop…
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…