Materials Literature
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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…
Recently there has been great interest in using patterned ferroelectric materials for the photochemical growth of metal nanostructures. Variations in surface and sub-surface structure influence the photochemical processes. Here we show that crystallography, and hence remnant polarization, of the ferroelectric affects…
The feasibility of chalcogenide rib waveguides working at λ=10.6μm has been demonstrated. The waveguides comprised a several micron thick Te2As3Se5 film deposited by thermal evaporation on a polished As2S3 glass substrate and further etched by physical etching in Ar or CF4∕O2 atmosphere. Output images at 10.6μm and so…
A series of yttrium and terbium benzoate complexes have been prepared and structurally characterised as DMF or DMSO solvates, often also hydrated. The structures of these complexes vary considerably as a function of the steric bulk of the ligands and the degree of solvation. The smaller rare-earth elements, yttrium an…
We introduce a structure made of periodic arrays of H-shaped metallic pattern that offers a potentially simple approach in building left-handed metamaterials with simultaneous negative permittivity and permeability. We have investigated experimentally the transmittance in the rectangle waveguide and found unambiguousl…
This chapter focuses on the clay minerals, deep circulation, and climate. Clay minerals are the main constituents of recent deep-sea or abyssal sediments. Their role as paleoclimatic and paleoceanographic indicators has been investigated by X-ray diffraction techniques. In marine sediments, clays are mainly detrital a…
Electrochemical Introduction of Amino Group to a Glassy Carbon Surface by the Electrolysis of Carbamic Acid, Uchiyama, Shunichi, Watanabe, Hiroaki, Yamazaki, Haruhito, Kanazawa, Aiko, Hamana, Hiroshi, Okabe, Yoshio
We demonstrate a strategy that appears particularly well suited for the design of redox-active liquid crystals and also constitutes the first demonstration of cyclic voltammetric responses of a metallomesogen in the columnar liquid crystalline phase.
Peat was taken from the Sergipe State, Brazil and characterized by several techniques: elemental and thermal analyses; Fourier infrared (FTIR) and solid state 13C nuclear magnetic resonance (NMR) spectroscopies; scanning electron microscopy (SEM), environmental scanning electron microscopy (ESEM) and X-ray diffractome…
Ultrafine ferrite grains as small as a few hundred nano meters were obtained, without severe plastic deformation, by tempering cold-rolled martensite in a low carbon and a microalloyed steel. A multilevel subdivision mechanism responsible for the formation of ultrafine ferrite grains in cold-rolled martensite was disc…
Methoxy poly(ethylene glycol)/chitosan graft co-polymers (CS-g-mPEGs) with different degrees of substitution were synthesized by reductive N-alkylation of chitosan with poly(ethylene glycol) aldehyde. The crystalline and thermal properties of CS-g-mPEGs were characterized by wide-angle X-ray diffraction (XRD), differe…
Abstract Phase‐selective synthesis of crystalline vanadium oxides is achieved by the CVD of vanadium oxo‐tri‐isopropoxide [VO(O i Pr) 3 ]. Preformed V–O and V=O units and their differential thermal stability present in the precursor enabled precise modulation of the vanadium/oxygen stoichiometry in the products of the…
With excellent current carrying capacity and extremely high thermal conductivity, carbon nanotube (CNT) has been proposed for interconnect and thermal interface material (TIM) applications. In this paper, we present a method of fabricating aligned CNT/copper composites on the silicon substrates and in the silicon diox…