Materials Literature
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The synthesis and application of a novel reversible addition‐fragmentation chain transfer (RAFT) agent carrying a photocaged thioaldehyde moiety is described (λmax = 355 nm). RAFT polymerization of styrene, dimethylacrylamide and a glycomonomer is evidenced (3600 g mol−1 ≤ Mn ≤ 15 000 g mol−1; 1.07 ≤ Đ ≤ 1.20) with ex…
Organic-inorganic mixed-valence systems with strongly-coupled triarylamine and cyclometalated osmium have been developed. They display two well-separated redox couples at low potentials. Each of the three readily accessible oxidation states can be distinguished by the absorbance at three different wavelengths.
We have studied gas adsorption effects on the structure of a metal–organic framework, MIL-53(Al), a material well-known because of the controllable framework “breathing” phenomenon. Neutron powder diffraction between 4 and 77 K and up to 4.5 bar pressure D 2 confirms that a structural phase transition is responsible f…
In this paper, we describe the fabrication and characterization of a GaN-based light-emitting diode (LED) on a GaN-on-silicon platform. A freestanding membrane structure eliminates the absorption of the emitted light by a silicon substrate and reduces the number of confined optical modes, leading to higher photolumine…
Telechelic oligomers functionalized with 2-ureido-4[1 H ]-pyrimidone (UPy), a quadruple hydrogen bonding group, have been synthesized using a combination of atom-transfer radical polymerization and click reaction. Ureidopyrimidone (UPy) synthons with propargyl and azide functionality were used for clicking with azido…
Microwave dielectric properties and thermally stimulated depolarization currents (TSDC) of (1− x ) Ba 0.6 Sr 0.4 La 4 Ti 4 O 15 – x TiO 2 ( x = 0, 0.01, 0.02, 0.05, and 0.1) ceramics were studied. X‐ray diffraction analysis indicates that the specimens show a hexagonal perovskite structure; however, with an increase o…
Incorporation reactions play an important role in dictating immobilization and release pathways for chemical species in low-temperature geologic environments. Quantum-mechanical investigations of incorporation seek to characterize the stability and geometry of incorporated structures, as well as the thermodynamics and…
Dipodal silanes possess two silicon atoms that can covalently bond to a surface. They offer a distinct advantage over conventional silanes commonly used for surface modification in terms of maintaining the integrity of surface coatings, adhesive primers, and composites in aqueous environments. New nonfunctional and fu…
A single nanoparticle antenna, can be used as an efficient coupler for plasmonic nanowire waveguides. The coup-ling of light into the surface plasmon polaritons on a nanowire can be suppressed or enhanced depending on the surface plasmon resonances of the nanoantenna. The coupler is compacted and can be simply control…
A new ultra‐low fire glass‐free microwave dielectric material Li 3 FeMo 3 O 12 was investigated for the first time. Single phase ceramics were obtained by the conventional solid‐state route after sintering at 540°C–600°C. The atomic packing fraction, FWHM of the A g oxygen‐octahedron stretching Raman mode and Qf value…
In order to evaluate the influence of germanium atoms in oligo- and polysilanes, a number of oligosilane compounds were prepared where two or more silicon atoms were replaced by germanium. While it can be expected that the structural features of thus altered molecules do not change much, the more interesting question…
A new synthetic approach towards the preparation of functionalised, soluble, donor-acceptor (DA) alkylbithiophene derivatives of oxadiazole, thiadiazole and triazole is reported. Taking advantage of the Fiesselmann reaction, reactive bithiophene synthons having alkyl or alkoxy substituents at designated positions are…
Oxidative stress induced by excessive production of reactive oxygen species (ROS) has been implicated in the etiology of many human diseases. It has been reported that fullerenes and some of their derivatives-carboxyfullerenes-exhibits a strong free radical scavenging capacity. The permeation of C60-fullerene and its…
Heavy carbon steel corrosion developed during nitrate mitigation of a flow rig connected to a water injection pipeline flowing anaerobe saline aquifer water. Genera-specific QPCR primers quantified 74% of the microbial biofilm community, and further 87% of the community of the nonamended parallel rig. The nonamended b…
Three new mixed-ligand metal–organic coordination networks based on tetrabromoterephthalic acid and different bis-imidazole or bis-triazole ligands, [Zn2(bmib)(tbtpa)2·2H2O]n (1), [Cd(ditb)(tbtpa)(H2O)2·2H2O]n (2), and [Zn(ditp)(tbtpa)]n (3) (bmib = 1,4-bis(2-methyl-1H-imidazol-1-yl)butane, ditb = 1,4-di(1H-1,2,4-tria…
A new sorbent was prepared by treating polyurethane foam with HCl and replacing the amino functional groups with iodine atoms. The properties of iodo-polyurethane were studied with infrared, ultraviolet and visible spectroscopy, bulk density, pHZPC and elemental and thermal analysis. Removal of aniline blue and crysta…
A systematic diagrammatic expansion for Gutzwiller wavefunctions (DE-GWFs) proposed very recently is used for the description of the superconducting (SC) ground state in the two-dimensional square-lattice t – J model with the hopping electron amplitudes t (and ) between nearest (and next-nearest) neighbors. For the ex…
A two-dimensional (2D) numerical model is implemented to describe the movement of ions under thermal poling for the specific case of optical fibers. Three types of cations are considered (representing Na(+), Li(+) and H3O(+)) of different mobility values. A cross-sectional map of the carrier concentration is obtained…
Two indacenodithiophene-based molecules with different side chains, BTIDT-C6 and BTIDT-OC12, have been designed and synthesized for solution-processed, small-molecule organic solar cells (OSCs) donor materials. By optimizing the side chains, the hole mobility of the materials is modulated, which has been proven by the…
Magnetoplasmonic crystals (MPC) composed of a 1D gold grating on top of a magnetic garnet layer made by a combined ion-beam etching technique are studied. We demonstrate that this method allows to make high-quality MPC. It is shown that MPC with a 30-40 nm thick perforated gold layer provides an effective excitation o…