Materials Literature
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Abstract As consumption of energy in the world is rising, there is growing interest in the building of pressure vessels as well as apparatus engineering and equipment construction for the storage of gases or technical liquids. For these applications, like boilers, reactors and columns, unalloyed or Nb‐microalloyed ste…
Optical constants of a [111] UO 2 crystal, aged in air for 25.5 years, were measured in the range from .75 and 5 eV using ellipsometric spectroscopy. The ellipsometric data acquired at angles of incidence of 65, 70 and 75 were modelled by a Gauss-Lorentz and a Tauc Lorentz Oscillator, leading to dielectric constants t…
The surface oxidation of uranium metal has been studied by X-ray diffraction (XRD) and Rietveld method in the range of 50~300°C in air. The oxidation processes are analyzed by XRD to determine the extent of surface oxidation and the oxide structure. The dynamics expression for the formation of UO 2 was derived. At the…
Material constitutive model for metal machining is very difficult to obtain and establish accurately by conventional tension and compression tests. The dynamic mechanical properties and material model during machining aluminum 7050-T7451 are studied by means of orthogonal machining experiments (including quick-stop ex…
In this paper, we explore the design and optimization of an on-chip active cooling system based on thin-film thermoelectric coolers (TEC). We start our investigation by establishing the compact thermal model for the chip package with integrated thin-film TEC devices. We observe that deploying an excessive number of TE…
CdSe quantum dots (QDs) were incorporated in polymer films via in situ polymerization using one of the four different monomers having a varied hydrocarbon side chain length, namely, hexyl, lauryl, stearyl, or behenyl methacrylate. This technique resulted in the preparation of a series of the QD-based nanocomposite mat…
Aging, the gradual changing of materials properties with time, is a well observed but puzzling phenomenon in ferroelectrics. It lowers the reliability of ferroelectric devices, and is thus usually undesirable. However, based on a defect mediated reversible domain switching mechanism, we obtained large recoverable elec…
Collision-induced dissociation (CID), along with infrared multiple photon dissociation/detachment (IRMPD) techniques, is utilized to study a series of doubly substituted aromatic dianions containing sulfonate and carboxylate functionalities (1,2- and 1,3-benzenedisulfonate, 1,5-naphthalenedisulfonate, 2,6-naphthalened…
Titania nanofibers were successfully synthesized by sol-gel coating of electrospun polymer nanofibers followed by calcining to form either the pure anatase or rutile phases. Characterization of these materials was carried out using scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse ref…
The conversion of minor actinides to fuel starting materials for transmutation in a closed nuclear cycle is a big challenge for the next decades and the development of Gen(IV) nuclear systems. Conversion routes are numerous, but one needs to prove that they can be adapted to handle minor actinides. One of them is call…
Taking into account the effect of the low-energy band structure of carbon nanotubes (CN), we develop the theories of CN field and thermionic emissions. We give the analytic field and thermionic emission equations for both metal and semiconducting CNs. These theories modify the conventional Fowler–Nordheim (FN) and Mur…
Silver nanoparticle polyvinyl pyrrolidone (PVP) composite containing 100 ppm of silver has been synthesized in powder form for textile applications, using sono-chemical method comprising sonication and reduction with trisodium citrate followed by spray drying. The synthesized PVP coated silver nanopowder is then chara…
Eu3+ doped ZrO2 nanocrystals were prepared by decanoic acid-assisted hydrothermal method. X-ray diffraction, transmission electron microscope, Fourier transform infrared spectroscopy, Ultraviolet-visible diffuse reflection spectroscopy, and photoluminescence spectra were used to characterize the phase evolution, morph…
In Ayurveda, Cissus quadrangularis Linn. is used to treat anorexia, asthma, sickle cell, colds, pain, and malaria. Aqueous C. quadrangularis extract was evaluated in vivo for its antiepileptic activity by using the maximal electroshock and isonicotinic hydrazide acid models, for its analgesic activity by using the hot…
The reaction kinetics of the metal exchange Cd(II)-Cu(II) and Cd(II)-Zn(II) in the cadmium complexes (CdP) with porphyrin ligands (H 2 P) differing by degree of stiffness (tetraphenylporphin, N -methyltetraphenylporphin, and tetraphenyltetrabenzoporphin) in the DMSO medium, was studied using spectrophotometric method.…
Author: Lohmüller, T. et al.; Genre: Book Chapter; Issued: 2010; Keywords: MPI für Metallforschung; Abt. Spatz; ; Title: Improved properties of optical surfaces by following the example of the "Moth Eye"
Problem statement: There is no specific instrument to test ultrasonic dental scalers used in dentistry. Approach: The aim of this research was to develop and test an innovative cavitometer for quantitative and automatic performance assessments of Ultrasonic Dental Scalers (UDS) through the acoustic emission produced b…
The second-order nonlinear optical properties of two monomeric red fluorescent proteins, mStrawberry and mCherry, have been experimentally determined by frequency-resolved femtosecond hyper-Rayleigh scattering. These proteins were found to exhibit a stronger nonlinear response than the previously described eGFP, eYFP…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Michito Kawasaki, Zhen He, Yasuhito Gotoh, Hiroshi Tsuji, Junzo Ishikawa; Development of in situ…
The classic anisotropic spherical cloak can be mimicked by many alternating thin layers of isotropic metamaterials [Qiu et al. Phys. Rev. E 79 (2009) 047602 ]. We propose an improved method of designing permittivity and permeability in each isotropic layer, which eliminates the jumping of the refractive index at the i…