Materials Literature
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Gold nanocavity arrays were prepared on fluorine-doped tin oxide on glass by electrochemical deposition of gold through monolayers of polystyrene spheres. The impact of the resulting spherical cap architecture on the photophysics of solutions and self-assembled monolayers of luminophore encapsulated within the nanocav…
Based on the transformation optics, a novel transmission-line (TL) approach to realize invisibility cloaking using planar anisotropic metamaterials (MTMs) is proposed. The two-dimensional (2D) cylindrical cloaks are modeled based on inductor-capacitor (LC) MTMs networks. The three elements of the constitutive paramete…
The present study investigates the effect of dispersed CdS on the αand βrelaxation processes of Poly (methyl methacrylate) (PMMA). Dynamic Mechanical Analyser (DMA) have been employed at fixed frequency 1Hz at temperatures from –80 °C to 150 °C to study the dynamics of films of thickness ~ 0.05 mm of PMMA and CdS-PMMA…
Electromagnetic scattering of a line source from a perfect electromagnetic conductor (PEMC) circular cylinder coated with double positive (DPS) material or double negative (DNG) material is investigated theoretically.The response of the coated PEMC circular cylinder is observed and it is noted that how the results obt…
Reversible photochromic changes and photoimaging were accomplished by H+ transfer between spiropyran and fluorescein in a polymer matrix.
A novel composite hierarchical hollow structure is reported. The as-prepared products consist of discrete WO(2) hollow core spheres with W(18)O(49) nanorod shells ("hollow urchins"). The products showed unusual magnetic behavior.
Organic nanodisks, a new type of organic nanoparticles suitable for creating polymer-polymer nanocomposites, are produced by controlled polymerization within the hydrophobic interior of bicelles (discoidal lipid aggregates) used here as recyclable scaffolds.
Spinodal decomposition in siloxane sol-gel systems has been investigated in a macroporous silica mould (pore diameter D = 2.74 µm) with a bicontinuous structure. Methyltrimethoxysilane (MTMS) and tetramethoxysilane (TMOS) have been employed as siloxane gel sources and as-sintered hydrophilic and octadecylsilylated hyd…
The ammonolysis of beta-Ga(2)O(3) to alpha-GaN and the oxidation of alpha-GaN to beta-Ga(2)O(3) have been studied by means of in situ X-ray absorption spectroscopy (XAS), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). In situ X-ray absorption measurements on polycrystalline powder parti…
Vaccination is a highly effective method and a cheap tool for preventing certain infectious diseases. Routine immunization programs protect most of the world's children from diseases that claim millions of lives each year. There are many practical problems impeding vaccine delivery, especially to maintain the cold cha…
Developments in biotechnology have seen the growing use of macromolecules containing proteins, peptides, vaccines, antigens, genes, and growth factors as therapeutic agents. Because these macromolecules are easily denatured and metabolized rapidly in vivo, their protection and controlled release are required. Biodegra…
Substitution reactions between [Yb(TPP)(OOCCH3)(CH3OH)2] (1) and neutral bidentate ligands NN led to the formation of monoporphyrinate ytterbium(III) complexes [Yb(TPP)(OOCCH3)(NN)] (TPP = 5,10,15,20-tetraphenylporphyrinate anion; NN = 4-methyl-1,10-phenanthroline (2), 1,10-phenanthroline (3), 4,7-dimethyl-1,10-phenan…
A shape-persistent macrocyclic molecule having glutamic acid and oligooxyethylene moieties exhibits a hexagonal columnar liquid-crystalline phase at ambient temperature through nanosegregation and the formation of intermolecular hydrogen bonding.
Large degradable dendrimers (MW > 30 kDA) were synthesized in a divergent manner utilizing a novel 1,3,5-triazaadamantane (TAA) monomer that can degrade under acidic conditions.
The family of layered organic salts X[Pd(dmit) 2 ] 2 are Mott insulators and form scalenetriangular spin-1/2 systems with antiferromagnetic exchange interactions J . Among them, EtMe 3 Sb[Pd(dmit) 2 ] 2 has a nearly regular-triangular spin system with J = 220-250 K. Our previous study proposed that a quantum spin-liqu…
Using solid state ring opening polymerization of oxirane by an amino substituted azobenzene derivative a film material with extremely high rate of holographic surface relief grating formation was obtained.
The electrochemical characteristics of carbon nanobeads (CNBs) heat-treated at 1000, 1500, 2000, and 2800 ° C were investigated. The discharge capacity was highest at the high rate ( 10 C ) in the 2000 ° C heat-treated CNBs. Electrochemical impedance spectrometry indicated that the charge-transfer resistance of 2000 °…
The characteristics of guided modes in the planar waveguides which the core or cladding consists of chiral nihility meta-materials are studied theoretically. The dispersion curves, electromagnetic fields, energy flow distribution and the power of several low-order guided modes in the chiral nihility waveguides are pre…
The synthesis of a series of shape-persistent macrocycles (SPMs) (1-4 and 6) comprising different numbers and/or spatial arrangement of meta-substituted tetrafluorobenzene and benzene subunits interlinked with diacetylenes is described. To increase their solubility, all five SPMs were functionalized by four peripheral…
A series of N-glycosylamine based organogelators were synthesized from 4,6-O-protected saccharides introducing pyridylamines. The gelation properties of these compounds were studied in regard to their molecular structure by scanning electron microscopy, differential scanning calorimetry, FT-IR spectroscopy and quantum…