Materials Literature
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Recently, it was reported that the alkaline niobate-based (K, Na, Li)(Nb, Ta, Sb)O3 (LF4) perovskite ceramics showed excellent piezoelectric properties and has been regarded as a new candidate of lead-free piezoelectric materials. However, the effects of additives on the piezoelectric property of LF4 have not been stu…
A new dendrimer-type ligand dynamically switched the lanthanide complexation and luminescence profiles in response to external anions.
Carbazole (Cz) monomers with p-tolylsulfonyl pyrrole (pTsp) (used as self-dopant) were electrochemically coated onto micrometer-sized carbon fiber by potentiodynamic method. The resulting micrometer-sized thin films of homopolymer and copolymers were characterized by using electrochemical methods (i.e., cyclic voltamm…
The electronic structure of thin films of the organic semiconductor vanadyl phthalocyanine has been studied using synchrotron radiation-excited resonant soft X-ray emission spectroscopy, resonant inelastic soft X-ray scattering, X-ray absorption spectroscopy, and X-ray photoemission spectroscopy. The C, N, V, and O pa…
The influence of lateral substituents was studied for a new series of bent-core liquid crystals with heptamethyltrisiloxane units at both ends of the aliphatic side chains. These materials were investigated by polarized light microscopy, differential scanning calorimetry, X-ray scattering and electro-optical methods.…
The highly transparent thin films were deposited through solution-based inkjet printing using a simple precursor solution. We were able to fabricate porous tin oxide thin film that has a thin nanoporous layer on top and a thicker meso- and macroporous layer beneath the top layer. The thin-film transmittance is over 98…
The low-spin iron(III) complex AsPh(4)[Fe(III)(bpy)(CN)(4)].CH(3)CN (1) [AsPh(4) = tetraphenylarsonium cation] and the heterobimetallic chains [{Fe(III)(L)(CN)(4)}(2)Ni(II)(H(2)O)(2)].4H(2)O with L = bpy (2) and phen (3) [bpy = 2,2'-bipyridine and phen = 1,10-phenanthroline] have been prepared and their structures det…
The effect of Ca addition on the corrosion resistance of AZ31 magnesium alloys was evaluated by observation of microstructure and measurement of corrosion potential and average corrosion rate. The main mechanism of corrosion of AZ31+xCa (x=0∼5 mass%) alloys was galvanic-corrosion between α-Mg and second phase. But the…
<abstract language="eng">In recent years, several studies have been developed in Brazil to produce biodegradable materials. A particular family of bacterial polymers, the polyhydroxyalkanoates (PHA), has received special attention. PHAs are thermoplastic, biodegradable, biocompatible, are synthesised from renewable re…
A novel synthesis of diastereoselective pure periodic mesoporous ethenylene-silicas is presented, using (a) the homemade E-diastereoisomer of bis(triethoxysilyl)ethene, (b) a more efficient extraction procedure of the template P123 and (c) an ultra-fast synthesis procedure.
Thanks to strong hydrophilic interactions between reaction products and the catalyst surface, mesoporous silica supported sulfonic sites were found to be much more selective than homogeneous and common solid acid catalysts.
This communication reports the use of Congo red to stain the nanofibers of self-assembled small molecules for assaying intracellular supramolecular hydrogels, which provides a convenient method to explore molecular self-assembly inside cells.
Quasicrystals, realized in metal alloys, are a class of lattices exhibiting symmetries that fall outside the usual classification for periodic crystals. They do not have translational symmetry and yet the lattice points are well ordered. Furthermore, they exhibit higher rotational symmetry than periodic crystals. Beca…
The formation of supramolecular organogels using an acid–base interaction was investigated in organogelation systems consisting of Nε-lauroyl-L-lysine ethyl ester and aliphatic acids. Although the L-lysine derivative and aliphatic acids hardly had any organogelation abilities for organic solvents and oils, the mixing…
Modular tissue-engineered constructs are assembled from sub-millimetre-sized cylindrical modules which are seeded with a surface layer of endothelial cells. The resulting construct is permeated by a network of interconnected, endothelial cell-lined channels to facilitate blood perfusion and nutrient delivery. To provi…
Homogeneous Li4Ti5O12 nanoparticles were prepared: First, LiOH was coated onto TiO2 nanoparticles via a sonochemical method, operated at 20 kHz and 220 W for 20 min. These particles have about 2–5 nm coating depth of LiOH on the TiO2 nanoparticle surface. Second, the resulting nanoparticles were thermally treated at 5…
Polyelectrolyte multilayers can be used to design films which respond to mechanical stimuli. The behaviors of three different polyelectrolyte multilayers deposited onto silicone sheets were investigated: PAH/PSS, PDADMA/PSS and PLL/HA films [PAH: poly(allylamine); PSS: poly(styrene sulfonate); PDADMA: poly(diallyldime…
Symmetrical and multivalent monomers having thermally degradable alkoxyl groups such as 1,3,5-triethynylbenzene and tetra(4-bromophenyl)silane derivatives were polymerised by certain appropriate methods, i.e. Hay or Sonogashira coupling, which gave hyperbranched poly(phenylenebutadiynylene)s and poly(phenyleneethynyle…
Photodynamic therapy (PDT) is a very useful approach for cancer treatment, but it has a few short-term and long-term side effects arising from reactive oxygen species (ROS) generation. Recently a new photodynamic therapy (PDT) based not on the ROS generation capability of photosensitizers but on the heat generation ca…
A pyrazole based ditopic ligand (PzOAP), prepared by the reaction between 5-methylpyrazole-3-carbohydrazide and methyl ester of imino picolinic acid, reacts with Cu(NO3)2.6H2O to form a self-assembled, ferromagnetically coupled, alkoxide bridged tetranuclear homoleptic Cu(II) square grid-complex [Cu4(PzOAP)4(NO3)2] (N…