Materials Literature
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Abstract Macroporous silicon layers with randomly distributed vertical cylindrical pores of average diameter 120 nm were fabricated on selected areas on a p + (resistivity 5 mΩcm) silicon substrate by anodization in HF x ethanol solution. The thickness of the layers was 50 μm and they are intended for use as RF isolat…
Abstract Cyclic voltammetry, chronoamperometry, UV‐vis absorption spectroscopy, fluorescence spectroscopy, FTIR spectroscopy, and AFM techniques have been employed to investigate pyronin Y thin films formed on Au(111) substrates by electrochemical oxidation of pyronin Y monomer. The medium used in the electropolymeriz…
This thesis describes work performed on a novel form of surface-micromachining, called self-sacrificial surface-micromachining, and an poly(methyl methacrylate) (PMMA) as both the structural and the sacrificial materials. PMMA is a common material in microfabrication processes, as it is an important resist material fo…
The paradigm for singular continuous spectra in symbolic dynamics and in mathematical diffraction is provided by the Thue-Morse chain, in its realisation as a binary sequence with values in $\{\pm 1\}$. We revisit this example and derive a functional equation together with an explicit form of the corresponding singula…
Almost monodisperse ZnS microspheres have been synthesized on a large scale by a hydrothermal route, in which tungstosilicate acid (TSA) was used as a soft template. By controlling the reaction conditions, such as reaction temperature, pH value of the solutions, and the reaction medium, almost monodisperse microsphere…
Dense multiferroic YMn 2 O 5 ceramics with a single orthorhombic phase are quite difficult to prepare because the orthorhombic phase decomposes at about 1180°C. In this study, spark plasma sintering (SPS) was investigated to synthesize YMn 2 O 5 ceramics. The sample sintered at 900°C for 5 min by SPS consisted of the…
Abstract The tensile properties of hexachiral honeycomb made of shape memory alloy (SMA) material are modelled and verified experimentally at different tensile loading and ambient temperature conditions. The numerical models describe the temperature‐pseudoelastic behaviour of the shape memory alloy materials constitut…
Water-dispersible polyelectrolyte multilayers (PEM) were obtained by layer-by-layer assembly of poly(allylamine hydrochloride) (PAH) and poly(sodium 4-styrene sulfonate) (PSS) on water-soluble poly(ethylene glycol)- graft-multiwalled carbon nanotubes (PEG- g-MWNTs), and their structures were investigated using solutio…
The isotope-induced ferroelectricity observed in $\text{SrTi}{^{18}\text{O}}_{3}$ (STO18) enables a systematic study of the crossover between quantum paraelectricity and ferroelectricity as a function of $x$ in $\text{SrTi}{^{16}\text{O}}_{1\ensuremath{-}x}{^{18}\text{O}}_{x}$ $(\text{STO}{16}_{1\ensuremath{-}x}\text{…
Today, synchrotron-based macromolecular crystallography (SRMX) beamlines are increasingly automated with an emphasis on pushing data collection speeds and sample throughput rates to the highest reasonably possible values. While these facilities are designed to be user-friendly, somewhat paradoxically the speed with wh…
Recently, the synthesis, crystallographic structure, and Mossbauer characterization of the first example of an [(Fe(IV)TAML)2O](2-) (TAML = tetra-amido microcyclic ligand) complex were reported. Here, we elucidate the prominent structural, electronic, and magnetic properties of this complex on the basis of density fun…
This article presents experiment data on the preferential CO oxidation (PROX) in a hydrogen-rich stream, currently the most practical method for CO removal induced by a double-stage process. The reaction was carried out in a microreactor testing unit using Au and Pt supported on an A zeolite catalyst in the temperatur…
Bismuth‐niobate‐based ceramic materials are of interest for embedded elements such as capacitors and filters because they exhibit high relative dielectric permittivities and tend to be processible at temperatures in the 1000°–1200°C range. As part of ongoing studies of phase equilibria and structure–property relations…
To provide thermodynamic data for isonicotinic acid production, the solubilities of isonicotinic acid in water and 4-methylpyridine binary solvent mixture were determined from (287.65 to 361.15) K with the solvent mole fraction composition ranging from 0.00 to 1.00. The experimental data were correlated with the modif…
Abstract Liquid natural rubber of different molecular masses L‐LNR, and H‐LNR were subjected to varying degree of epoxidation (L‐ELNR‐10, L‐ELNR‐20, L‐ELNR‐30, L‐ELNR‐40, L‐ELNR‐50, H‐LNR‐20, and H‐LNR‐50) and the products were incorporated into PVC at various compositions by the solution blending method. These blend…
Abstract In a topologically constraining environment the size of a flexible nonconcatenated ring polymer (macrocycles) and its dynamics are known to differ from that of linear polymers. Hence, the diffusion coefficient of ring polymers can be expected to be different from linear chains. We present here scaling argumen…
In our previous report, a polyaniline (PAn) and ionic liquid butylmethylimidazolium camphorsulfonate (BMICS) composite was used as a methane sensing material which significantly increased the sensitivity for methane detection using quartz crystal microbalance (QCM) transducers. In this paper, we focus on the interacti…
Fully biodegradable micro/nano-composite resins were prepared by reinforcing soy protein concentrate (SPC) with micro/nano-fibrillated cellulose (MFC) and then blending with gellan. The composite resins showed excellent mechanical and physical properties under testing conditions. Due to the high aspect ratio of MFC, e…
The performance of three commercially available room-temperature-vulcanized (RTV) silicone rubber (SIR) coatings was evaluated by means of salt fog testing. Leakage current and contact angle measurements were used in order to monitor the coatings' performance. The measurements indicated that the initial loss of hydrop…
Abstract Chain configuration influences phase behavior of blends of poly(methyl methacrylate) (PMMA) of different tactic configurations (syndiotacticity, isotacticity, or atacticity) with poly( L ‐lactic acid) (PLLA). Blends system of sPMMA/PLLA is immiscible with an asymmetry‐shaped UCST at ∼250 °C. The phase behavio…