Materials Literature
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The spin states of the iron(III) complexes with a highly ruffled porphyrin ring, [Fe(TEtPrP)X] where X = F-, Cl-, Br-, I-, and ClO4(-), have been examined by 1H NMR, 13C NMR, EPR, and Mössbauer spectroscopy. While the F-, Cl-, and Br- complexes adopt a high-spin (S = 5/2) state, the I- complex exhibits an admixed inte…
Different types of synthetic amorphous silica have been dissolved under biological-like conditions in a buffer system. The buffer solution named TRIS buffer provides a system with comparable pH value, buffer capacity, and osmotic pressure as it can be found in extracellular fluid. Additionally, the phospholipid l -α-d…
Methods for producing protein patterns with defined spatial arrangement and micro- and nanoscale features are important for studying cellular-level interactions, including basic cell-cell communications, cell signaling, and mechanisms of drug action. Toward this end, a straightforward, versatile procedure for fabricat…
The salt [ET]x[MnRh(ox)(3)].CH(2)Cl(2) (x = 2.526(1)) has been obtained and characterized. This paramagnetic metal is essentially isostructural to the ferromagnetic metal [ET]y[MnCr(ox)(3)].CH(2)Cl(2) (y approximately equal to 3) and provides a definite answer on the origin of the structural disorder present on such s…
We investigated the near-field optical properties of single gold nanorods. Transmission images observed near the surface plasmon resonances agree qualitatively with the calculated maps of the optical local density of states and are reflected by spatial characteristics of plasmon wave functions. Ultrafast temporal resp…
Silver micro- and nanocrystallites are prepared on porous Si substrates by immersion plating, and their activity toward SERS (surface-enhanced Raman scattering) is assessed. Scanning electron microscopy reveals a rough silver film containing randomly spaced dendritic structures. SERS spectra of Rhodamine 6G (R6G) and…
Ion conduction in noncrystals (glasses, polymers, etc) has a number of properties in common. In fact, from a purely phenomenological point of view, these properties are even more widely observed: ion conduction behaves much like electronic conduction in disordered materials (e.g., amorphous semiconductors). These univ…
A series of AlSBA-15 materials with different n Si / n Al ratio have been synthesized by simply adjusting the molar water to hydrochloric acid ratio ( n H 2 O / n HCl ). It was possible to control the n Si/ n Al ratio, location, and coordination of Al atom in the SBA-15 silica matrix by the above method. Moreover, AlS…
Piezo-induced picosecond nonlinear optical effects are investigated in polyvinyl alcohol photopolymer doped by YAB:Cr nanocrystallites of 10–40 nm size. The second harmonic generation (SHG) is studied versus the applied uniaxial mechanical stress up to 20 GPa. The observed phenomena are explained within a framework of…
The dielectric constant of the proton conductor SrZr 1− x Yb x O 3 ( x = 0–0.1) was measured as a function of temperature and frequency. Two well-defined relaxation peaks were observed in SrZrO 3 doped with more than 1 mol% of Yb. The assignment of the two dielectric relaxations is discussed in terms of IR spectra and…
Metastable phases of silver and gold in hexagonal close-packed structures are investigated by means of first-principles total-energy calculations. Two different methods are employed to find the equilibrium states: determination of the minima along the hexagonal epitaxial Bain path, and direct determination of minima o…
The effect of benzimidazole‐2‐tione and benzoxazole‐2‐tione derivatives on the corrosion of aluminium in 0.1 M HCl has been investigated by a potentiostatic polarisation technique. Inhibition efficiencies were found to follow the order: benzimidazole‐2‐tione > 5‐methyl benzimidazole‐2‐tione > 5‐chloro benzimidaz…
In this investigation, the inhibitory effect of a new synthesised tetra‐dentate Schiff‐base, bis‐(2‐hydroxy‐1‐naphthaldehyde) 1,6‐hexadiamine ( A 1 ), on the corrosion of carbon steel in 1 M HCl and 0.5 M H 2 SO 4 media solutions was studied using various techniques including electrochemical impedance spectroscopy pol…
NiTi shape memory thin films are potentially desirable for micro-electro-mechanical system (MEMS) actuators, because they have a much higher work output per volume and also a significantly improved response speed due to a larger surface-to-volume ratio. A new technique using a temperature controllable atomic force mic…
F-passivated ZnO nanocrystalline films were prepared by thermal oxidation of ZnF 2 films. ZnF 2 films were deposited on a Si wafer by the electron beam evaporation technique. X-ray diffraction and x-ray photoelectron spectroscopy were used to study the structural changes of ZnF 2 as a function of oxidation temperature…
The collagen triple helix is one of the most abundant protein motifs in animals. The structural motif of collagen is the triple helix formed by the repeated sequence of -Gly-Xaa-Yaa-. Previous reports showed that H-(Pro-4(R)Hyp-Gly)(10)-OH (where '4(R)Hyp' is (2S,4R)-4-hydroxyproline) forms a trimeric structure, where…
Experimental results of breakdown voltage, tanδ and the parameters of partial discharges for multilayer Polyfilm insulation are presented. It is shown that the breakdown voltage of multilayer film insulation may be increased approximately by 70% compared with single-layer insulation of the same thickness due to the co…
The influence of the Co3+ spin state on the optical properties of LaCoO3 and HoCoO3 , L V Nomerovannaya, A A Makhnev, S V Streltsov, I A Nekrasov, M A Korotin, S V Shiryaev, G L Bychkov, S N Barilo, V I Anisimov
There is an increasing demand for eco‐friendly inhibitors for use in cooling water systems. Both calcium gluconates and molybdate are eco‐friendly, non‐toxic chemicals. The corrosion inhibition of calcium gluconate and sodium molybdate on carbon steel in neutral aqueous media was evaluated by means of weight loss, ele…
The high-pressure Raman spectra of ferroelastic NaAl(MoO4)2 have been measured at room temperature. The studies indicated that this crystal exhibits two pressure-induced phase transitions at about 1.1 and 3.3 GPa. The first transition is connected with slight rotation of the MoO4−2 tetrahedra with loss of the inversio…