Materials Literature
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The transition between the relaxor and ferroelectric states for 0.8Pb(Mg1∕3Nb2∕3)O3–0.2PbTiO3 and 0.7Pb(Mg1∕3Nb2∕3)O3–0.3PbTiO3 polycrystalline aggregates has been studied by measurements of the dielectric and elastic properties as a function of temperature. The ferroelectric to relaxor transition seems to present a r…
Abstract FT‐IR and FT‐Raman spectra were recorded for bis( L ‐proline) hydrogen nitrate and bis( L ‐proline) hydrogen perchlorate crystals. The wavenumber assignments have been made for the proline functional groups, viz. COOH, COO − , CNCCC ring, [NH 2 ] + , (CH 2 ), CCN and CH. In both crystals, two prolin…
We report experimental observations of shell buckling instabilities in free-standing, vertically aligned GaN nanotubes subjected to uniaxial compression. Highly uniform arrays of the GaN nanotubes standing on a GaN template were fabricated and subjected to uniaxial compression using a nanoindenter. The buckling load w…
Uniform single-walled carbon nanotube films are fabricated by a DC electrodeposition technique from a dispersion solution of the nanotubes in dry organic solvents. Thick and shiny or thin and see-through, tightly bound films are formed on various substrates (see Figure). Highly efficient deposition is made possible by…
Recent time-resolved measurements in optically excited individual semiconducting single-walled carbon nanotubes have revealed rapid electron-hole pair annihilation. A stochastic model of the carrier dynamics has been proposed that includes Auger interactions and discrete occupancy of the nanotubes by the carriers [F.…
Arrangement of structural units in a ZnO [0001] $\ensuremath{\Sigma}=49$ symmetric tilt boundary was investigated using a combination of high-resolution electron microscopy and atomistic calculation in detail. The boundary is found to be described by the combination of two different dislocationlike structural units an…
This paper sets forth the experimental procedure for obtaining the parameter set of a synchronous machine model with saturation and arbitrary linear network representation for the rotor. The method utilizes a combination of magnetization curves and standstill frequency-response tests. A novel test procedure is propose…
The third-harmonic-generation (THG) spectrum was measured for a NiBr-chain compound, which is a one-dimensional Mott insulator, in a reflection configuration. A sharp peak and a shoulder structure in the THG spectrum are attributed to three-photon resonance to an exciton and a continuum, respectively. The band-edge en…
The behavior of mercury-derivatized triclinic crystals of a 60 kDa protein target from the New York Structural GenomiX Research Consortium provides novel insights into the mechanism of heavy-atom-specific radiation damage and its potential exploitation for de novo structure solution. Despite significant anomalous sign…
A method which is able to produce different types of nano-structured materials, namely nano-particles, nano-structured surfaces and nano-porous membranes, from two-phase metallic alloys is reviewed. The new process first establishes nano-structures in the bulk alloy and then separates them by selective phase dissoluti…
We report heat capacity $({C}_{p})$ measurements on high-quality single crystals of hexagonal $\mathrm{Y}\mathrm{Mn}{\mathrm{O}}_{3}$, a ferroelectric and frustrated triangular antiferromagnetic (AF) compound. The obtained values of the critical exponent $\ensuremath{\alpha}$ and amplitude ratio ${A}^{+}∕{A}^{\ensurem…
We study the electronic structure of the carbon nanotube theoretically by the first-principles techniques using the local-density approximation (LDA) with the many-body correction in the GW approximation. We find that the (9,0) tube is gapful irrespective of naive expectation from the graphene band structure. All of t…
UV-curable chitosans (UVCC-7-10) were synthesized using less-toxic agents. The UVCC-7 was completely cured by UV spot irradiation for 4 s. The UVCC-7 was implanted into murine subcutaneous tissues, and the response to the implantation was observed by histological examination at 7 days after implantation. In the histol…
$X$-band electron paramagnetic resonance spectra were recorded for ${\mathrm{Zn}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{O}$ films grown by pulsed laser deposition and a single crystal for comparison. For different Mn concentrations in ${\mathrm{Zn}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{O}$ films we performe…
Poly(methyl methacrylate)/clay nanocomposites have been prepared using a pseudo-dispersion polymerization of MMA monomer in the presence of fluorinated surfactant-modified clay (10F-clay) in supercritical carbon dioxide. The nanocomposites are characterized by scanning electron microscopy, transmission electron micros…
Collagen, as a major constituent of human connective tissues, has been regarded as one of the most important biomaterials. As a coating moiety on Ti hard-tissue implants, the collagen has recently attracted a great deal of attention. This article reports the effects of fibrillar assembly and crosslinking of collagen o…
We describe an electrochemical-based approach to create vertically aligned nanotube arrays on substrates. Initially, nanoporous anodic alumina films are used as templates to electrodeposit nanorods, and then the alumina templates are removed and nanotube arrays are electrodeposited using the nanorod arrays as template…
The objective of this study is to develop a new method of manufacturing glass fiber reinforced epoxy composites and to quantitatively show that the properties of such a new material are superior to that of a conventional fiber reinforced polymer composite of the same material base composition. To achieve this objectiv…
In this paper, we present models of $\mathrm{Ge}\text{\ensuremath{-}}\mathrm{Se}$ glasses heavily doped with Ag obtained from ab initio simulation and study the dynamics of the network with an emphasis on the motion of ${\mathrm{Ag}}^{+}$ ions. The models are analyzed with partial pair correlation functions, static st…
Abstract Cubic [Ru 2 (O 2 CMe) 4 ] 3 [Cr(CN) 6 ] prepared from water has two interpenetrating lattices and exhibits anomalous magnetic hysteresis, saturation magnetization, out‐of‐phase alternating current (AC) susceptibility, χ″( T ), and zero‐field‐cooled/field‐cooled temperature‐dependent magnetization data with re…