Materials Literature
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The synthesis of three-dimensional (Pm3n) cubic phenylene-bridged hybrid mesoporous silica material using a novel allylorganosilane precursor 1,4-bis(triallylsilyl)phenylene and cetyltrimethylammoniumchloride (C16TMACl) as a structure-directing agent in acidic medium is presented. Sulfonic acid functionalized derivati…
This paper describes a new energy model of yarn bending. The fibre bending and torsion energy terms are considered. The fibre helices could be naturally curved. Fibre helices in a bent yarn are generated by a rotating vector. The singularity of torsion along a bent fibre helix is discussed. By allowing the rotation sp…
Gallium zinc oxynitride (Ga0.93Zn0.07)(N0.90O0.10) is a new type of photocatalyst that is capable of overall water splitting under visible light. The crystal structure of the (Ga0.93Zn0.07)(N0.90O0.10) was refined by Rietveld analyses of neutron powder diffraction data. The (Ga0.93Zn0.07)(N0.90O0.10) was confirmed to…
Reconstructive surgery using autologous vessels is the conventional approach for substitution of diseased vessels or for generation of bypass to improve blood supply downstream of stenosed vessels. In some circumstances the use of autologous material is not possible due to concomitant diseases or previous use, and art…
The reactions of methyl(2-pyridyl)ketone oxime, (py)C(Me)NOH, with zinc chloride have been investigated. An excess of the ligand in EtOH/MeCN affords the mononuclear complex [ZnCl 2 {(py)C(Me)NOH} 2 ] (1) in moderate yield. The metal ion is coordinated by two chloro ligands and two N,N′- chelating (py)C(Me)NOH molecul…
Dense SiC ceramics fabricated by NITE process (NITE-SiC), using SiC nano-powder, were subjected to exposure tests from 1000 to 1800°C in an argon-oxygen gas mixture with an oxygen partial pressure of 0.1 Pa. The thermal stability of NITE-SiC was examined through mass change, 3-point bending test, XRD analysis and TEM/…
The perovskite-related intergrowth oxides, Sr 3 − x La x Fe 2 − y Co y O 7 − δ ( 0.3 ⩽ x ⩽ 0.6 and 0 ⩽ y ⩽ 0.6 ), have been investigated as cathode materials for intermediate temperature solid oxide fuel cells. With a given La content x , the electrical conductivity, oxide-ion vacancy concentration, and thermal expans…
Hierarchically porous inorganic nanocomposites have been synthesized combining interconnected macropores and mesopores with a high loading of site-isolated gold nanoparticles.
We established a method to clean the Si surface that exists at the bottom of anodic aluminum oxide (AAO) nanoholes after removal of the amorphous barrier layer, and we succeeded in the preparation of epitaxial Cu dot arrays on the Si surface in the nanoholes. The Si surfaces at the AAO nanohole bottoms were cleaned wi…
Using a [Ru(II)([9]aneS3)] templating moiety, kinetically-locked, metallomacrocycles incorporating adenine based ligands have been synthesised through self-assembly. The kinetically robust nature of these structures is confirmed by electrochemical studies: each can be reversibly oxidised in a four-member redox series,…
Two new C(21) steroidal glycosides, tenacissoside L (1), tenacissoside M (2), were isolated from the stems of Marsdenia tenacissima (ROXB.) WIGHT et ARN. Their structures were elucidated, respectively, by means of chemical and spectral data, including ESI-MS, HR-ESI-MS, 1D-NMR and 2D-NMR.
In a recent X–ray absorption study in boron doped diamond, Nakamura et al. have seen a wellisolated narrow boron impurity band in non-superconducting samples and an additional narrow band at the chemical potential in a superconducting sample. We interpret the beautiful spectra as evidence forupper Hubbard band of a Mo…
Nanotechnology, building on its ability to control or manipulate structures at the atomic level, promises to develop effective drug-delivery systems. This is to be achieved through creating structures that have novel properties because of their small size. This is not an entirely new concept in site-targeted drug deli…
The research on electromagnetic (EM) shielding has been advanced for various applications. Recently, researchers have been interested in nano-sized particles to modify electromagnetic properties of a base material. In this research, glass fiber–epoxy–nanoparticle composites (GFR nanocomposites) are fabricated using fo…
Surface plasmon-like (SPL) modes are the electromagnetic surface eigenmodes supported by the structured perfectly conducting surfaces. The standard eigenvalue-solving method is adopted to solve these SPL modes. The field patterns of the SPL modes in the square holes for in-plane wavevectors k(x) = 2pi / 2d and k(x) =…
A three-dimensional structure formation simulator of colloidal nanoparticles during drying is developed. Motion of the nanoparticles is modeled by Langevin equation, in which forces exerted on each nanoparticle consist of contact force, capillary force, Brownian force, van der Waals force, electrostatic force and flui…
The surface properties of vascular devices dictate the initial postimplantation reactions that occur and thus the efficacy of the implantation procedure. Over the last number of years, a number of different stent designs have emerged and stents are generally polished to a mirror finish during the manufacturing procedu…
Continuous and modulated discharges, fed with divinyltetramethyldisiloxane mixed with oxygen and argon, were used to deposit carbon-doped silica-like (SiCOH) low- to ultralow- films. The effect of various process parameters on the dielectrical and thermal properties of films as well as on their chemical composition we…
Guest–host MEH-PPV/MCM-41 composites were prepared by liquid-phase self-assembly via insertion of poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) macromolecules inside mesoporous silica. The effect of the solvent nature on the polymer loading and luminescence properties of the composites was exp…
It has been reported that the size and distribution of β-Si3N4 particles existing in silicon nitride raw powder are crucial factors governing the microstructure of silicon nitride ceramics. Considering such the grain growth behavior, a processing strategy for controlling the microstructure of silicon nitride ceramics…