Materials Literature
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A significant increase in the quantum efficiency of an organic red-light-emitting diode was achieved through coupling with localized surface plasmons of Au nanorods with a length of 50–60 nm embedded on the substrate anode. We used 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4 H -pyran (DCM)-doped tris(8-h…
We have studied the energy transfer properties of a novel silicon phthalocyanine that coordinates two anthracene-9-carboxylate groups in the form of trans axial ligands. Our objectives were to generate a system with auxiliary chromophores that enhance the light absorption properties of the macrocycle in a specific reg…
We report the use of a simple Ag nanoparticle (NP) platform to enhance the fluorescence signatures of conjugated polyelectrolytes (CPEs). Ag NP platforms with different extinction intensities were fabricated by self-assembly of Ag NPs on NH(3)(+)-functionalized glass surface. Layer-by-layer (LBL) deposition of opposit…
The modification of silica nanoparticles with hexafluoropropylene oxide (HFPO) oligomers has been investigated. HFPO oligomers with two different average degrees of polymerization (DPn = 8 and 15) were first prepared by anionic ring-opening polymerization, deactivated by methanol, and in some cases postfunctionalized…
Solid‐state compatibilities in the rich tricalcium phosphate and rich zinc oxide regions of ZnO–CaO–P 2 O 5 ternary system were established through experimental studies. These are of special interest: the tricalcium phosphate region, for further bioceramic applications, and the zinc oxide region for applications relat…
Abstract Ferroelectric and piezoelectric properties of the La‐doped intergrowth Aurivillius phase ceramics Bi5−xLaxTiNbWO15 and Bi7−xLaxTi4NbO21 (x = 0.00–1.75) were studied. It was found that the La doping is in favour of the domain switching. Owing to the impact of defects, the P–E hysteresis loops of the La‐doped B…
Superconducting ternary germanide SrPd${}_{2}$Ge${}_{2}$ single crystals (${T}_{c}=$ 2.70 K) with a ThCr${}_{2}$Si${}_{2}$-type structure were synthesized using a high-temperature metal flux method. Superconductivity was confirmed by temperature- and magnetic-field-dependent magnetization, electrical resistivity, and…
Two bile acid derived molecules containing basic amino groups are reported to be efficient and unusual gelators of organic and aqueous solvents.
Relying on classical electrostatics, we extend the understanding of the electrostatic forces responsible for polarity to nano-objects. We show that while no actual divergence of the electrostatic potential occurs in polar nano-objects, beyond a critical object size, the divergent behavior of the potential differences…
Lead sulphide (PbS) quantum dots (QDs) are used as a Pb2+-ion-selective sensor and infrared detector. Also, the unique surface-sensitive properties make PbS QDs great potential in the development of optical sensors. In this research, the authors present a facile, effective and green route for the synthesis of well-def…
The reaction of tetrasodium-4,4',6,6'-tetracarboxy-2,2'-bipyridine (Na(4)L) with various lanthanide ions yields a family of isostructural supramolecular {Na(2)[Ln(2)L(2)]} complexes (1-4), where Ln(III) = Eu, Nd, Gd, and Tb. Strikingly, these complexes luminesce in buffered H(2)O or D(2)O solutions in either the visib…
Quantum dot superlattices (QDSLs) have been proposed for thermoelectric applications as a means of increasing thermal conductivity, σ, and reducing the lattice thermal conductivity, κ(l), to increase the dimensionless thermoelectric figure of merit, ZT. To fully exploit the thermoelectric potential of Si-Ge quantum do…
Solubility of anthracene and phenanthrene in binary mixtures of ethanol + 2,2,4-trimethylpentane at (298.2, 308.2, and 318.2) K are reported. Five numerical methods were used to predict the solubility of anthracene and phenanthrene in the studied binary solvent mixtures, and the mean relative deviation (MRD) was used…
A series of trialkylsilyl-substituted 2,2'-dithiophene, 4,4'-di-n-hexyl-2,2'-dithiophene, 5,5'-dithiazole, and 2,2'-diselenophene with carbonyl (2a-d) and α-dicarbonyl bridges (3a-d) were prepared from readily available dihalides, using double lithiation followed by trapping with N,N-dimethylcarbamoyl chloride or diet…
Metal coordination complexes are emerging as an important class of optical imaging probes. They may function not only as stains for particular cell compartments, but also as responsive probes, able to report on changes in local ionic composition. The critical factors to consider in designing such probes are reviewed,…
Electronic structures, magnetic properties, and spin-dependent electron transport characteristics of C-doped ZnO nanowires have been investigated via first-principles method based on density functional theory and nonequilibrium techniques of Green's functions. Our calculations show that the doping of carbon atoms in a…
We report the development of a novel method of improving the wet wrinkle recovery of silk fabrics without affecting the whiteness or the tensile properties of the cross-linked fabrics. Previous attempts on cross-linking silk with poly(carboxylic acids) have been done in the dry state at high temperatures (150−175 °C)…
We report on a 1H NMR study of diamond nanoparticles decorated by copper and cobalt. Increase in the 1H relaxation rate under decoration results from the interactions of hydrogen nuclear spins of the surface hydrocarbon and hydroxyl groups with paramagnetic copper and cobalt ions. This finding reveals the appearance o…
Lead phosphate glasses containing Eu(3+) and Dy(3+) have been studied. Local structure was verified using Fourier transform (FT)-IR spectroscopy. Emission bands of Eu(3+) and Dy(3+) ions in lead phosphate glasses are observed in the visible spectral range, which correspond to 5D0→7F(J) (J=0,1,2,4) and 4F(9/2)→6H(J/2)…
In Part 1, the promising hydrogen storage properties of the combined systems of Li 3 AlH 6 /LiBH 4 and Al/LiBH 4, exhibiting the favorable formation of AlB 2 during dehydrogenation, were presented based on TGA and XRD analyses. The present Part 2 describes the characterization of the intermediate and final products of…