Materials Literature
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In this Letter, sol–gel was used to prepare hydrophobic films on the enamel substrate. Using tetraethoxysilane (TEOS) as the precursor, which was combined with dimethyldichlorosilane (DDS), films with SiO2 nanoparticles were coated on the enamel substrate, which make the droplets contact angle increase to over 110°. F…
Image modeling establishes the relation between an object and its image when an optical microscope is used to measure the dimensions of an object of size comparable to the illumination wavelength. It accounts for the influence of all of the parameters that can affect the image and relates the apparent feature width (F…
Nano-poly(3-methoxythiophene) (NPMOT) was electrochemically synthesized on an ITO surface in the ionic liquid 1-butyl-3- methyl-imidazolium tetrafluoroborate ([BMIM]BF4) by a potentiodynamic polymerization method. NPMOT was characterized by fourier- transform infrared spectroscopies (FTIR) and scanning electron micros…
The electrical and magnetic properties of a bcc Fe 1- x A x , system with the average atom formed by A = (Al, Si, V, Cr) are presented. Compositions were chosen to obtain alloys of simple structure with control parameter ( x ) covering some important Heusler alloys. Systematic changes in the residual resistivity, magn…
A series of novel fluorescent poly(ether-imide)s (PEIs) bearing ether linkage and diarylimidazole pendant in the backbone was successfully prepared by polycondensation reaction between a new unsymmetrical diamine and commercially available tetracarboxylic acid dianhydrides. The PEIs were characterized by Fourier trans…
Abstract Bovine serum albumin/poly(acrylic acid), BSA/PAA, nano‐scaled particles were produced by noncovalent bonds induced self‐assembly method at acid pH area. Proper conditions during preparation process, such as pH value, BSA/PAA weight ratio(WR), PAA molecular weight, were researched by studying the hydrodynamic…
Abstract The dynamic mechanical properties and electrical conductivity of a class of polyurethane fluoroelastomers filled with different carbon black types and loadings were investigated. In particular, finely structured and coarsely structured carbon blacks were considered. Dynamic mechanical analysis (DMA) on the un…
Abstract A novel bis(3,5‐di‐ tert ‐butylsalicylaldehyde‐ co ‐ethanolamine) titanium(IV) complex (Ti(Tbse) 2 ) was synthesized and structurally characterized. The X‐ray diffraction results showed that the titanium ion was bonded with two 3,5‐di‐ tert ‐butylsalicylaldehyde‐ co ‐ethanolamine ligands (Tbse ligands) in O ,…
Abstract Copolymers of tributyl citrate (TBC) and hexamethylenediamine (HMDA) were synthesized with a solvent‐free condensation method with molar ratios of TBC to HMDA varying from 2:1 to 1:2. The reaction led to poly(succinimide‐ co ‐citramide) copolymers which were characterized by infrared and Raman spectroscopies,…
Abstract A new family of quaternary phases with the general sum formula Cu 3+ δ Bi 5– δ Se 8–2 δ X 2+2 δ ( X = Cl, Br) was discovered by slow cooling of high temperature melts. Cu 3.58(1) Bi 4.42(1) Se 6.84(2) Cl 3.16(2) ( δ = 0.58) and Cu 4.52(1) Bi 3.48(1) Se 4.96(2) Br 5.04(2) ( δ = 1.52) crystallize isostructural…
Abstract Reactively sputtered zinc oxide thin films typically exhibit a c -oriented (0 0 0 1) texture of low crystalline order when deposited on unheated substrates. The structural order can be significantly improved upon heating the substrates during deposition. Here it will be demonstrated that by utilizing c -textu…
Magnetic properties of interacting La(0.2)Ca(0.8)MnO(3) nanoparticles have been investigated. The field-induced transition from antiferromagnetic (AFM) to ferromagnetic (FM) state in the La(0.2)Ca(0.8)MnO(3) bulk has been observed at exceptionally high magnetic fields. For large particles, the field-induced transition…
The blends of fluororubber (FKM) and silicone rubber (MVQ) were prepared by the incorporation of fumed silica using vinyl thiethoxy silane (VTEO) grafted onto FKM (FKM- g -VTEO) as a compatibilizer. The effect of the compatibilizer loading on the curing characteristics, mechanical properties, heat aging properties and…
Summary Pumping a gravel slurry between a downhole screen and the rock matrix has been used to prevent production of undesirable solids or sand from the formation in traditional oil and gas completions. Recently developed expandable technology attempts to eliminate this operation by expanding metallic sand-control scr…
Herein, we report the formation of organized mesoporous silica materials prepared from a novel nonionic gemini surfactant, myristoyl-end-capped Jeffamine, synthesized from a polyoxyalkyleneamine (ED900). The behavior of the modified Jeffamine in water was first investigated. A direct micellar phase (L(1)) and a hexago…
Abstract For the first time, the formation of hollow microspheres of the carboxyl functionalized self‐doped conducting polymer polyanthranilic acid (PANA), based on a two phase oxidative polymerization technique using two immiscible solvents, is reported. The spherical morphology of the functionalized polymer is obtai…
Abstract Two novel and well‐defined polymers, poly[6‐(5‐(diphenylamino)‐2‐((4‐methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate] (PDMMA) and poly[6‐(4‐((3‐ethynylphenyl)diazenyl) phenoxy)hexyl methacrylate] (PDPMMA), which bear triphenylamine (TPA) incorporated to azobenzene either directly (PDMMA) or with an interval…
The two-dimensional cyano-bridged coordination polymer Er(H(2)O)(4)[W(CN)(8)] exhibits a magnetic transition at 12 K and an unusual field-dependent transition from short-range to ferromagnetic ordering.
We report experimental nitrogen adsorption isotherms of organics-coated silicas, which exhibit a low-pressure desorption branch that does not meet the adsorption branch upon emptying of the pores. To address the physical origin of such a hysteresis loop, we propose an equilibrium thermodynamic model that enables one t…
A microcrystalline Sr2P207:Eu2+ pyrophosphate-based phosphor was prepared by the modified solid-state diffusion. The crystalline phases were recognised using X-ray diffraction and surface morphology was studied by scanning electron microscope. Photoluminescence properties were investigated under ultraviolet-ray excita…