Materials Literature
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Nitrogen-vacancy (NV−) color centers in diamond were created by implantation of 7 keV N15(I=1∕2) ions into type IIa diamond. Optically detected magnetic resonance was employed to measure the hyperfine coupling of single NV− centers. The hyperfine spectrum from NV−15 arising from implanted N15 can be distinguished from…
The mechanical properties of materials and particularly the strength are greatly affected by the presence of defects; therefore, the theoretical strength ( approximately 10% of the Young's modulus) is not generally achievable for macroscopic objects. On the contrary, nanotubes, which are almost defect-free, should ach…
Preface. 1 Basics of Metal Matrix Composites (Karl Ulrich Kainer). 1.1 Introduction. 1.2 Combination of Materials for Light Metal Matrix Composites. 1.3 Mechanism of Reinforcement. 1.4 Interface Influence. 1.5 Structure and Properties of Light Metal Composite Materials. 1.6 Possible Applications of Metal Matrix Compos…
A model of an industrial semibatch sodium perborate tetrahydrate (SPT) precipitation process, based on mass, population, and energy balances, is presented. The model parameters of growth, nucleation, and agglomeration were obtained by nonlinear parametric optimization from the experimental data for the sodium perborat…
Abstract Highly ordered CoSb3 nanowire arrays have been fabricated successfully by direct current electrodeposition from aqueous solution into the pores of a porous anodic aluminum oxide (AAO) template. Extensive characterization of the as-synthesized sample has been performed using X-ray diffraction (XRD), scanning e…
Hydrogen cyanide (HCN) oxidation under lean conditions was studied on 0.5% Pt/Al 2 O 3 catalysts. Fractional factorial design was used to determine which factors had significant effects on HCN conversion in these experiments. We conclude that reaction temperature and gas hourly space velocity (GHSV) had the most signi…
The novel pyridine-containing 14-membered macrocycle 3,11-dithia-7,17-diazabicyclo[11.3.1]heptadeca-1(17),13,15-triene (L), which contains an N2S2 donor set, was synthesized, and its protonation behavior was studied by absorption titration with CH3SO3H. The reaction of L with Pd(II) was studied spectroscopically, and…
The synthesis and characterization of hydroxamic acid containing single-chain and TRIS-assembled (where TRIS is tris(carboxyethoxymethyl)aminomethane) collagen mimetics are reported. We have engineered an Fe(III)-binding domain by placing a hydroxamic acid group at the C termini of collagen mimetic chains composed of…
Abstract We have successfully immobilized Zn–Al layered double hydroxide (LDH) directly on glass substrates through the sol–gel method with hot water treatment. Al2O3–ZnO thin films were originally prepared on glass substrates by the sol–gel method with a heat treatment at 400 °C for 30 min, and then the films were im…
Summary: Diatoms (Bacillariophyceae) from high altitude aquatic environments of Catamarca Province in Argentina. II. In this research focusing the diatoms of high topographic wetlands, 14 samples of different freshwater bodies (between 2,420 and 4,240 m a. s. l.) were studied. Two hundred and eight infrageneric taxa w…
The solubility of berberine chloride in ethanol, 2-propanol, 1-butanol, 1-octanol, ethanol + 2-propanol, ethanol + 1-butanol, and ethanol + 1-octanol was measured. According to the molecular structure of berberine chloride, we defined a new group [C 5 H 2 N + ] based on the existing parameter table of UNIFAC (Dortmund…
The high-bias electrical transport properties of suspended metallic single-walled carbon nanotubes (SWNTs) are investigated at various temperatures in vacuum, in various gases, and when coated with molecular solids. It is revealed that nonequilibrium optical phonon effects in suspended nanotubes decrease as the ambien…
The synthesis of porphyrin precursors requires the successive introduction of substituents at the pyrrole alpha- and alpha'-positions (2- and 5-, respectively). An alpha-pyrrole substituent that serves as a temporary masking agent and is not deactivating would greatly facilitate such syntheses, particularly for beta-(…
Ti-MCM-41 mesoporous molecular sieves were prepared at ambient temperature and were characterized by X-ray absorption near-edge structure and extended X-ray absorption fine structure, UV-vis, Fourier transform infrared spectroscopy, and photoluminescence spectroscopic analyses. It was found that an increase in the Ti…
Derivatization of silicon surfaces is an area of intense interest due to the centrality of silicon in the microelectronics industry and because of potential promise for a myriad of other applications. In this paper, we investigate the feasibility of Si-Si bond formation directly on the surface to contrast with the mor…
Biobased neat unsaturated polyester materials containing epoxidized methyl linseedate (EML) were processed with cobalt naphthenate as a promoter and 2-butanone peroxide as an initiator. Up to 25 wt % of the unsaturated polyester resin (UPE) was replaced by EML to process biobased UPE. The combination of UPE and EML re…
The selective adsorption of heavy isotopes in narrow nanotubes, known as quantum sieving, is studied using a simple approximate theory for several different potential models. We address the reasons for wide disagreement among previously published results for quantum sieving. We analyze the sensitivity of quantum sievi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTElectrically Conductive Epoxy/Clay/Vapor Grown Carbon Fiber HybridsMasaya Kotaki, Ke Wang, Mei Ling Toh, Ling Chen, Siew Yee Wong, and Chaobin HeView Author Information Institute of Materials Research and Engineering, 3 Research Lin…
Systematic studies on symmetric twin molecules composed of two bent-core mesogenic units are reported for the first time. It is shown that the formation of mesophases mainly depends on the chemical structure of the spacer. A sufficiently flexible spacer containing dimethylsiloxane units allows a decoupling of the meso…
Praseodymium hydroxide nanorods were synthesized by a two-step approach: First, metallic praseodymium was used to form praseodymium chloride, which reacted subsequently with KOH solution to produce praseodymium hydroxide. In the second step the hydroxide was treated with a concentrated alkaline solution at 180 degrees…