Materials Literature
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Upon combining 5,10-dipyridyl-15,20-diphenylporphyrin 1 or its copper metallated complex 2 with metal halides (MX2: M = Zn, Cd, Hg; X = I or Br) five [2 + 2] metallamacrocycles of the square type were obtained and structurally characterised in the crystalline phase by X-ray diffraction methods. Whereas the free porphy…
The general CO2 corrosion rates of C1018 carbon steel have been measured for NaCl concentrations 3 – 25 wt% at 5oC, pH4.0. The corrosion process was monitored by linear polarization resistance and potentiodynamic sweeps. Experimental results show that high salt concentrations affect the general CO2 corrosion rate sign…
A new combination tanning system based on aluminium, silica and tetrakis (hydroxymethyl) phosphonium sulphate (THPS) has been developed as a chrome free tanning. The concept of wet white tanning to replace wet blue leathers has been applied. Three separate combinations viz. silica-aluminium, silica-THPS and silica-THP…
A boundary integral formulation and its numerical implementation are presented for the \nanalysis of magneto-electro-elastic media. The problem is formulated by using a suitable set of \ngeneralized variables. The governing boundary integral equation is obtained by generalizing the \nreciprocity theorem to…
Energy transport in nanostructures differs significantly from macrostructures because of classical and quantum size effects on energy carriers. Experimental results show that the thermal conductivity values of nanostructures such as superlattices are significantly lower than that of their bulk constituent materials. T…
Introducing tertiary amine monomers into holographic sensors containing phenylboronic acids gives greatly improved selectivity for glucose.
Progress in developing high cooling power, short-legged thermoelectric coolers (TECs) for local cooling of high power density electro-optic components is represented. Different competitive methods aimed toward TEC miniaturization, such as processing of bulk materials as well as thin-film and thick-film technique, are…
The gelling and spectroscopic properties of new soluble disubstituted acenes (anthracene, tetracene, pentacene) are reported. It is shown that the 2,3-alkoxy derivatives gel a large variety of organic solvents, a process that is related to the linear shape of the molecule. The gelation involves the formation of nanofi…
Results of experimental and modelling evaluation of scaling factors for difficult-to-measure radionuclides in the Ignalina Nuclear Power Plant (INPP) waste are of primary importance in solving the decommissioning problems. The peculiarities of experimental measurements with radiochemical preparation of investigated IN…
Hybrid thin films of crystalline ZnO modified by 5,10,15,20-tetrakis(4-sulfonatophenyl) porphyrinato zinc (TSTPPZn) and 2,9,16,23-tetrasulfophthalocyaninatozinc(II) (TSPcZn) were prepared by electrochemical deposition from aqueous zinc salt solutions. A "one-step" process with the sensitisers adsorbed during ZnO depos…
The general corrosion rate may be measured using immersion tests or electrochemical tests. The electrochemical tests are fast and can be used for a rapid screening of environmental effects such as temperature and electrolyte composition. The electrochemical tests are described in ASTM standards G 59 and G 102. The bas…
We demonstrate how the precise three-dimensional (3D) assembly characteristics of biomineralizing micro-organisms may be combined with synthetic chemical processing to generate photoluminescent microparticles with specific 3D shapes and tailored chemistries. Silica-based microshells with a rich variety of controlled s…
Highly-ordered, pore-modified with amine groups, and glass-like mesoporous silicon oxynitride thin films were prepared by heat treatment of as-synthesized mesoporous silica thin films in a flowing ammonia environment at high temperatures.
Large area SERS (surface-enhanced Raman scattering)-active films with closely packed nanoembossed Ag arrays were reproducibly fabricated by the replication method of polymer surfaces with nano-size grooved Al masters. Three different sizes (60, 105 and 420 nm) of nanoembossed polymer surface were produced from three d…
Abstract A systematic study of the structural and electronic properties of a 1,2‐dichlorobenzene (DCB) molecule interacting with metallic single‐wall carbon nanotubes is reported. The calculations were performed through ab initio methods using the SIESTA code. The interaction between DCB and nanotube is observed to de…
A significant amount of Washington State Department of Transportation (WSDOT) portland cement concrete (PCC) pavement that was placed in the 1960s is nearing the end of its serviceable life and must soon be rehabilitated or replaced. Initial WSDOT estimates place the cost of the anticipated work at more than $600 mill…
The synthesis of H-bonded bent-core side-chain liquid crystal polymers carried out by two alternative synthetic routes and their properties are reported.
Abstract Chemical approaches have emerged as the preferred means to synthesize nanostructures of various inorganic materials due to superior control over size, shape, and surface functionality. This article provides an overview of the contributions made in the authors' laboratory toward the synthesis of nanocrystals,…
Abstract The chemistry of chemithermomechanical pulping (CTMP) was assessed by chemical pre-treatment of spruce chips, followed by laboratory-scale refining. Pre-treatments with alkali, sulfite, alkaline sulfite and alkaline peroxide liquors were carried out at 40°C, 60°C and 80°C. The sodium hydroxide dosages were 1%…
Ordered mesoporous transition metal oxides were successfully crystallized after strengthening the amorphous framework by a silica layer, which efficiently protected the original mesoporous structure against crystallization and resulting mass transfer.