Materials Literature
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A mathematical model for the combined top and bottom blowing VOD refining of stainless steel has been proposed. It is essentially based on the assumptions made for the AOD process of stainless steel under the conditions of combined side and top blowing in our previous work, but considering the effects of reduced ambie…
A pair of temperature and cosolvent-controlled assemblies of one dimensional (1-D) and two dimensional (2-D) Zn(II)-organic frameworks (ZOFs] based on 5-iodoisophthalic acid (H2IIP) and an auxiliary flexible ligand, 1,4-bis(triazol-1-ylmethyl)benzene (bbtz) with different structures, has been rationally designed and s…
Keggin type polyoxometalates K4[a-SiW12O40] was synthesized and transformed to H4[a-SiW12O40]. Both catalysts have been used for pinacol rearrangement in toluene at 373 oK. The results showed that reaction of pinacol rearrangement did not proceed using K4[a-SiW12O40] as catalyst. The extent reac-tion time until 20 h a…
Abstract Synthesis of novel solids, in a chemical sense, is one of the spearheads of innovation in materials research. However, such an undertaking is substantially impaired by lack of control and predictability. We present a concept that points the way towards rational planning of syntheses in solid state and materia…
Three coordination polymers of Robson-type macrocycles, {[Cu4L1(4,4′-bipy)2]·4ClO4·H2O}∞ (1), {[Cu4L2(4,4′-bipy)4]·2CH3CN·4ClO4·2H2O}∞ (2), and {[Zn2L2(4,4′-bipy)2]·(ClO4)2}∞ (3) (where H2L1 and H2L2 are the [2 + 2] condensation products of 1,3-diaminopropane with 2,6-diformyl-4-methylphenol and 2,6-diformyl-4-fluorop…
Reaction of iron(III) thiocyanate with isonicotinamide (inia) in ethanol leads to formation of a dark red, air stabile crystalline iron(III) compound of composition [iniaH·inia][Fe(inia)2(NCS-N)4]. Single-crystal X-ray diffraction analysis shows the triclinic P–1 space group with unit cell parameters: a = 8.2440(4) Å,…
Plasmonic lithography may become a mainstream nanofabrication technique in the future. Experimental results show that feature size with 22 nm resolution can be achieved by plasmonic lithography. In the experiment, a plasmonic lens (PL) is used to focus the laser energy with resolution much higher than the diffraction…
Large‐scale sheet‐like nickel telluride (NiTe) nanocrystals in situ grown on nickel foam with three‐dimensional network structure were successfully synthesized by reacting elemental nickel with tellurium powder. The reaction was conducted via a facile solvothermal method in a mixed solvent composed of 1 mL ethylenedia…
ABSTRACT The pH‐sensitive poly(acrylamide‐co‐maleic acid)/montmorillonite (P(AAm‐MA)/MMT) nanocomposite hydrogels were synthesized through in situ polymerization. The chemical structure and morphology of nanocomposites were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, and transmission e…
We report the synthesis, physicochemical characterization, and crystal structure of Cu-SP (SP = styrylphosphonic acid, H2O3PCH=CH2(C6H5)), the first reported example of a metal derivative of SP. The starting SP acid was fully characterized by X-ray single-crystal diffractometry, elemental analysis (C and H), 31P-NMR,…
Dual phase weathering (DP‐weathering) steels were developed by inter‐critical annealing treatments from a commercial hot‐rolled weathering steel. The effects of martensite volume fraction (MVF) and microstructural changes accompanied the martensitic transformation on mechanical properties, formability, and corrosion b…
ABSTRACT Fluidity and slump loss are main technical indicators for the quality of concrete. They are related to the dispersion of cement and hydration process, and are greatly affected by the structure of superplasticizers (SPs). For the purpose of obtaining SPs with excellent fluidity and slump retention, water‐solub…
ABSTRACT The influence of an acid comonomer on the structural evolution and thermal behaviors of a polyacrylonitrile (PAN) terpolymer containing about 4.19 wt % methyl methacrylate and 0.98 wt % itaconic acid (IA) during a heating treatment were studied by Fourier transform infrared (FTIR) spectroscopy, differential s…
ABSTRACT Polymeric matrices based on hydroxypropyl methylcellulose (HPMC) with xanthan (X) or chitosan (Q) and using KNO3 as a model fertilizer were prepared as three‐layered tablets and assayed as controlled release fertilizers (CRFs). The dynamic swelling behavior was analyzed in order to interpret the water uptake…
This study presents arc surface remelting of three types of sintered stainless steels carried out in order to constitute a homogeneous microstructure in the surface layer which is free from open and interconnected porosity. The main aim of this treatment was to improve functional properties of the sinters analysed, es…
Cascade heterojunction (CHJ) organic solar cells have recently emerged as an alternative to conventional bulk heterojunctions and series‐connected tandems due to their significant promise for high internal quantum efficiency (IQE) and broad spectral coverage. However, CHJ devices thus far have also exhibited poor fill…
We explore a facile and nontoxic hydrothermal route for synthesis of a Cu2ZnSnS4 nanocrystalline material by using l-cysteine as the sulfur source and ethylenediaminetetraacetic acid (EDTA) as the complexing agent. The effects of the amount of EDTA, the mole ratio of the three metal ions, and the hydrothermal temperat…
This work describes the unexpected alignment of a common perylene bisimide fluorescent dye (Lumogen Red305) in a host liquid crystal matrix. The negative dichroic fluorophore orients with the primary absorption/emission dipole, corresponding to the physical long axis of the perylene bisimide core, perpendicular to the…
We demonstrate a synthetic approach for highly ordered hexagonal mesoporous carbon nanofibers with bimodal porosity, with an extremely high surface area and a high inner pore volume of 1928 m 2 /g and 2.41 cm 3 /g, respectively. A tubular silica template acts as an alternative fiber template for anodic alumina membran…
Marine microbes use alginate lyases to degrade and catabolize alginate, a major cell wall matrix polysaccharide of brown seaweeds. Microbes frequently contain multiple, apparently redundant alginate lyases, raising the question of whether these enzymes have complementary functions. We report here on the molecular clon…