Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A simple approach is presented for using bond-stretching and bond-bending modes to describe the static deformations of carbon nanotubes and related actuation effects. This approach allows us to analyze various phenomena in a unified way and to clarify their relationships. We discuss gap energy modulation by external s…
Abstract Large single crystals of polar Li 2 SeO 4 ·H 2 O were grown at 343 K from aqueous solution. Temperature dependent thermal expansion coefficients of Li 2 SeO 4 ·H 2 O and Li 2 SO 4 ·H 2 O were determined within the temperature range 133 K–313 K and coefficients of the pyroelectric effect within the temperature…
The Dynamic Electrochemical Impedance Spectroscopy has been applied for stress corrosion cracking (SCC) investigations. The effect of applied potential and tensile stresses on the stress corrosion cracking behaviour of type 304L stainless steel (SS) immersed in 0.5 M NaCl solution of room temperature has been examined…
The low-frequency infrared and Raman spectra of sodium and potassium phosphate solutions have been measured and discussed. The geometries, energies, and vibrational frequencies of various isomers of PO 4 3- (H 2 O) n, n = 0−6 are calculated at various levels up to MP2/6-31+G*. These properties are studied as a functio…
Nonordered and ordered porous alumina substrates with pore diameters of 20 and 50 nm, respectively, were utilized to immobilize lipid membranes spanning the pores of the porous material. The substrates were characterized by means of interferometry and electrical impedance spectroscopy. For impedance data reduction, an…
Thin films of polypyrrole doped by polyanions have been deposited onto stainless steel and carbon fibers by anodic electropolymerization of pyrrole in the presence of an anionic polyelectrolyte in water. Films with a thickness smaller than 600 nm have been formed, which strongly adhere to the solid supports. The polym…
Abstract New thermosetting polymeric materials were prepared by the cationic copolymerization of corn oil or conjugated corn oil with styrene and divinylbenzene initiated by boron trifluoride diethyl etherate or related modified initiators. The gel times ranged from a few minutes to hours or even days depending on the…
The preparation and the properties of several ruthenium complexes of the general formula cis-RuL(2)X(2) with L = 2,2'-bipyridine-4,4'-bisphosphonic acid, L' = 2,2'-bipyridine-5,5'-bisphosphonic acid, and X = Cl, CN, or NCS are reported. The synthesis of these complexes relies on the preparation of the key intermediate…
The synthesis, photophysical and nonlinear optical properties of several new multi-octupolar tris(bipyridine) ruthenium complexes are reported. The preparation on these complexes is based on the initial construction of multipodal 4,4'-dialkylaminostyryl-2,2'-bipyridine ligands (DAAS-bpy). Thermally stable polyimides f…
Palladium-catalyzed polycondensation between 2,5-dibromo-4-alkylthiazoles (alkyl = butyl thorough nonyl) and 2,5-bis(trimethylstannyl)thiophene gave charge-transferred-type alternating polymers, PTz(R)Th's. PTz(R)Th's had a high regioregularity as judged from their 1 H NMR and X-ray diffraction (XRD) data, and the hea…
59Co NMR measurements on La1-xSrxCoO3 reported here establish unequivocally, for the first time, the coexistence of ferromagnetic regions, spin-glass regions, and hole-poor low spin regions at all x values from 0.1 to 0.5. A zero external field NMR spectrum, which is assigned to the ferromagnetic regions, has a spectr…
A nanosized octadecaheteronuclear aggregate, [[NiL(2)](12)[Nb(CN)(8)](6)(H(2)O)(6)], and a 1-D coordination polymer, [[MnL(1)](2)[Nb(CN)(8)](H(2)O)]( infinity ), have been obtained by self-assembly between the octacyanometalate [Nb(CN)(8)](4)(-) and [ML](2+) complexes. The dimensionality of the supramolecular architec…
Growth of single crystal beta carbon nitride ( β ‐C 3 N 4 ) nanorods (see Figure) has been achieved for the first time through thermal annealing of nanosized carbon nitrides induced by high‐energy ball milling under a streaming flow of NH 3 . Most of the nanorods grow along the [001] direction, and the surfaces are de…
Surface modification of citrate-reduced gold nanoparticles with 2-mercaptosuccinic acid (MSA) was carried out in the aqueous phase. This provides a way to obtain carboxylic acid functionalized gold nanoparticles with diameter above 10 nm. The influence of the protecting MSA layer on the behavior of the modified gold n…
The charge inversion phenomenon is studied by molecular dynamics simulations, focusing on size and valence asymmetric salts, and a threshold of surface charge density for charge inversion. The charge inversion criteria by the electrophoretic mobility and the radial distribution functions of ions coincide except around…
We analyze the influence of a glass transition gradient near the particle surfaces on the nonlinear mechanical behavior of reinforced elastomers. We studied systems consisting of grafted silica particles dispersed in a cross-linked poly(ethyl acrylate) matrix. Both particle/matrix interfaces and dispersion states of t…
Properties of a Nuclear-Spin-Polarization-Induced Quantum Ring (NSPI QR) are studied theoretically. In the proposed system a local nuclear spin polarization creates an effective hyperfine field which confines the electrons with the spins opposite to the hyperfine field to the regions of maximal nuclear spin polarizati…
We carry out finite-difference time-domain simulations, with a specially designed boundary condition, on pure evanescent waves interacting with a lossy left-handed material (LHM) slab. Our results provide the full-wave numerical evidence for the amplification of evanescent waves inside a LHM slab of finite absorption.…
Periodic (CASTEP and DMol 3 ) and cluster (Gaussian 98 and DMol 3 ) ab initio calculations were carried out to develop force field parameters for the system Ti−O−H to model TiO 2 −H 2 O interfaces. A force field was derived from previously existing force fields for bulk TiO 2 polymorphs (Matsui, M.; Akaogi, M. Mol. Si…
We report on a unique, very simple method of preparation of reactive membranes and nanotemplates with nanoscopic cylindrical channels on the surface of various inorganic and polymeric substrates. Well-ordered nanostructured thin polymer films have been fabricated from the supramolecular assembly of poly(styrene-block-…