Materials Literature
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What will happen if one brings two metallic probes into direct contact with a polymer film and apply a voltage bias? We demonstrate that, for a mixed ionic/electronic conductor containing a luminescent conjugated polymer and a polymer electrolyte, it is possible to induce strong in situ electrochemical doping of the l…
Current dogma dictates that bacterial proteins with misoxidized disulfide bonds are shuffled into correctly oxidized states by DsbC. There are two proposed mechanisms for DsbC activity. The first involves a DsbC-only model of substrate disulfide rearrangement. The second invokes cycles of reduction and oxidation of su…
Duplex stainless steels contain similar amounts of austenite and ferrite α. This two-phase microstructure leads to an excellent combination of mechanical properties and corrosion resistance. However, there are few works dealing with the wear behaviour of these steels. This paper aims to determine the sliding wear me…
Hydrophilic chemically stable porous silicon surfaces are generated by surface functionalisation with polar head terminated lipid biomolecules of the monoglyceride type. Two approaches to anchor the monoglyceride moiety to porous silicon surfaces are presented.
In this study, a simple anodic oxidation process resulted in the successful synthesis of novel N-ion-doped TiO(2) with one-dimensionally aligned and large-sized mesopores. TiO(2) obtained by this anodic oxidation process possessed the high values of specific surface area and a large amount of one-dimensional mesopores…
We report on the interface characteristics of yttria-stabilized zirconia films grown on silicon substrates. From x-ray reflectivity analysis we found that the film thickness and interface roughness decreased as the growth temperature increased, indicating that the growth mechanism varies and the chemical reaction is l…
Abstract Electrospinning is known as a simple and effective fabrication method to produce polymeric nanofibers suitable for biomedical applications. Many synthesized and natural polymers have been electrospun and reported in the literature; however, there is little information on the electrospinning of poly[(amino aci…
A corrosion-resistant electrocatalyst support was prepared by overcoating high surface-area diamond powder ( diameter, ) with a thin layer of boron-doped ultrananocrystalline diamond (B-UNCD) by microwave plasma-assisted chemical vapor deposition. This core-shell approach produces electrically conducting and high surf…
Ternary chalcogenide As-S-Se glasses, important for optics, computers, material science and technological applications, are often made by pulsed laser deposition (PLD) technology but the plasma composition formed during the process is mostly unknown. Therefore, the formation of clusters in a plasma plume from differen…
Photolithographically generated patterns have been created on immobilized CdSe QD thin films by fine-tuning their optical properties (intensity and emission wavelength) postsynthetically. These optically modified QDs show enhanced selectivity for binding of different ligands, affording the ability to fabricate optical…
New lead‐free (Bi 0.5 Na 0.5 ) 1− x − y − z (Bi 0.5 K 0.5 ) x Ba y Sr z TiO 3 ceramics have been prepared by an ordinary sintering technique and their structure, ferroelectric, and piezoelectric properties have been studied. X‐ray diffraction patterns reveal that a morphotropic phase boundary (MPB) of rhombohedral and…
Abstract BACKGROUND: Glycerol (Gly) a by‐product from biodiesel production was impregnated onto the surface of expanded vermiculite (EV) and reacted to produce a highly efficient absorbent to remove oils spilt on water. RESULTS: Expanded vermiculite was impregnated with glycerol at EV/Gly ratios of 1/1, 1/2, 1/3 and 1…
Abstract BACKGROUND: This study was aimed at investigating the recrystallization of magadiite into offretite in the presence of tetramethylammonium cations (TMA). The offretite was characterized by X‐ray powder diffraction, scanning electron microscopy, infrared spectroscopy, N 2 adsorption analysis, thermogravimetry…
Previously, the synthesis of highly oriented pure double-gyroid nanoporous silica films has been demonstrated using evaporation-induced self-assembly (EISA) and dip-coating with a specialty triblock surfactant (PEO-PPO-alkyl) as the template. For these films, grazing-incidence small-angle X-ray scattering (GISAXS) was…
A significant obstacle to organic photovoltaics is radiation damage, either directly by photochemical reactions or indirectly via hot electrons. Such effects are investigated for biomimetic dye molecules for solar cells (phthalocyanines) and for a biological analog (the charge transfer protein cytochrome c). Both feat…
Electroless Gold Plating on Aluminum Patterned Chips for CMOS-Based Sensor Applications, Ko, Jung Woo, Koo, Hyo Chol, Kim, Dong Wan, Seo, Sung Min, Kang, Tae June, Kwon, Yongjoo, Yoon, Jung Lim, Cheon, Jun Ho, Kim, Yong Hyup, Kim, Jae Jeong, Park, Young June
Ca-doped CuAlO 2 films were prepared by the radio-frequency magnetron sputtering technique. As shown by X-ray diffraction measurements, single-phase hexagonal CuAl 1 − x Ca x O 2 is formed for Ca concentrations up to 1.5 atom %. Hall measurements confirm the p-type conduction for all films. The introduction of Ca lead…
A dextran-based dual-sensitive polymer is employed to endow gold nanoparticles with stability and pH- and temperature-sensitivity. The dual-sensitive polymer is prepared by RAFT polymerization of N-isopropylacrylamide from trithiocarbonate groups linked to dextran and succinoylation of dextran after polymerization. Th…
A series of discotic octa- and tetra-alkylthio substituted phthalocyanines containing four Cl, Br, I atoms or twelve fluorine atoms have been prepared. All compounds display columnar mesomorphism as confirmed by polarized optical microscopy, thermal analysis, and variable temperature X-ray diffraction. Phthalocyanines…
By means of numerical simulation we confirm that in graphene with point defects a quasigap opens in the vicinity of the resonance state with increasing impurity concentration. We prove that states inside this quasigap cannot longer be described by a wave vector and are strongly localized. We visualize states correspon…