Materials Literature
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Extruded collagen fibres have been shown to be a competitive biomaterial for tissue-engineering applications. Since different tissues are coming in different textures, as far as it is concerned their fibre diameter and consequently their mechanical properties, herein we aim to investigate the influence of the collagen…
The encapsulation of chloroperoxidase from Caldariomyces fumago (CPO) in block copolymer polymersomes is reported. Fluorescence and electron microscopy show that when the encapsulating conditions favour self-assembly of the block copolymer, the enzyme is incorporated with concentrations that are 50 times higher than t…
Organogels formed by a new thermotropic discotic liquid crystal in water/ethanol mixtures show two types of gel with very different levels of elastic modulus depending on the gelation temperature. In the pure material, transitions from a discotic columnar (Colh) to a plastic crystal (PK) to a crystalline (K) phase wer…
The dealloying behavior of Cu60Zr30Ti10 metallic glass was investigated under free corrosion conditions using hydrofluoric acid (HF) solutions at room temperature. After immersing in HF solutions with various concentrations (0.05, 0.1, 0.5 and 1 M) for 300 s, color of all samples changed to be pinkish or peachy, which…
Polysaccharides and protein biopolymers are of increasing interest for their use as sustainable film and coating materials. However, their main drawback in these applications is their inherent high water permeability and low water resistance at high relative humidity conditions. In this study, two specifically designe…
Oxide coatings were formed on AZ91D Mg alloy by microarc oxidation (MAO) in a sodium aluminate -based electrolyte, and the effects of additive electrolytes, KF, NaOH, and KOH, on the physical and chemical properties of the MAO coatings were investigated, particularly focusing on their corrosion resistance determined b…
MnOOH and MnO2 polymorphs are synthesized using a reaction between Mn2+and MnO4− in water at low temperature (95 °C). Nanoparticles are characterized using powder XRD, TEM and electron diffraction. Depending on the acidity of the aging medium, γ-MnO2 compounds are shown to be obtained as nanorods (final pH = 2.0) or h…
In this work, VO2 nanorods have been initially generated as reactive nanoscale precursors to their subsequent conversion to large quantities of highly crystalline V2O3 with no detectable impurities. Structural changes in VO2, associated with the metallic-to-insulating transition from the monoclinic form to the rutile…
Nanofibers with white-light emission were directly prepared from aqueous single-colored CdTe nanocrystals (NCs), poly[p-xylene-α-(dialkyl-sulfonium halide)] [namely, the sulfonium polyelectrolyte precursor of poly(p-phenylene-vinylene) (PPV)], and poly(vinyl alcohol) (PVA) by an electrospinning technique. An interesti…
Apoferritin-coated photoluminescent CdSe nanoparticles generated by an EDTA-mediated in situ method are photostable, water soluble and biocompatible.
We report transport and thermodynamic properties of stoichiometric single crystals of the hexagonal iron-pnictide FeCrAs. The in-plane resistivity shows an unusual "non-metallic" dependence on temperature T , rising continuously with decreasing T from ∼800 K to below 100 mK. The c -axis resistivity is similar, except…
Effects of Coulomb correlation on the LaFeAsO electronic structure are investigated by the LDA + DMFT(QMC) method (combination of the local density approximation with the dynamic mean-field theory; impurity solver is a quantum Monte Carlo algorithm). The calculation results show that LaFeAsO is in the regime of interm…
A new function of a photochromic diarylethene, having trimethylsilyl groups at the reactive positions, has been developed. Upon alternating ultraviolet and visible light irradiation, the diarylethene showed photoreversible photochromism in a polymer film, as well as in solution. The colored state changed to colorless…
Polyaniline tower-shaped hierarchical nanostructures were prepared through an unusual route by a limited hydrothermal reaction. The evolution of these superstructures was investigated and the relative mechanism was discussed. This growth process is quite different from that of traditional inorganic layer-like superstr…
We report a method to prepare nanocube-based super-crystals, which not only have a well-defined structure but also have a well-defined shape and size.
A novel method for speedy fabrication of free-standing layer-by-layer (LbL) multilayer films in salt free media, and without the need for a sacrificial sublayer is described by using two different polyelectrolyte complex (PEC) nanoparticles as LbL self-assembly building blocks. Negatively charged polyelectrolyte compl…
In this contribution, we report the synthesis and characterization of the second order non-linear properties of a series of unconventional terpyridyl and dipyridylphenyl platinum complexes. These new platinum complexes consist of a tridentate ligand substituted by a high electron acceptor, and a chloro or an arylacety…
Focused high frequency electromagnetic waves reflected from a PEC paraboloidal surface placed in homogeneous, reciprocal and isotropic medium with high chirality parameter are analyzed.The value of the chirality parameter is set such that it simultaneously supports modes of negative and positive phase velocities.Prese…
Smart surfaces can alter their macroscopic properties on demand. Over the past decade, a variety of approaches have been pursued to create reversibly switchable surfaces, which were triggered by several different stimuli. For instance, stimuli-responsive polymers or self-assembled monolayers (SAMs) can be employed to…
Abstract An improved process to N‐demethylate opiate alkaloids utilising a solution of the ferrous porphyrin, tetrasodium 5,10,15,20‐tetra(4‐sulfophenyl)porphyrinatoiron(II) [=Fe(II)‐TPPS (8)], in acetate buffer is described. This method provided the corresponding N‐demethylated opiates in good yield with high reprodu…