Materials Literature
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2,2'-Bis(fluorodiphenylsilyl)azobenzenes bearing two methyl and butyl groups at the 4- and 4'-positions were synthesized, and their X-ray crystallographic analyses revealed that they have tetracoordinated and pentacoordinated silicon atoms, respectively. Although the two compounds showed almost the same spectra in sol…
Formation of 1/1 Yb–Cd type approximants has been verified in the Ag–In–RE (RE: rare earth metals) system for RE = Tm, Tb, Er, Dy, Gd, Pr, Ce, or Eu. The compositions of the 1/1 approximants determined by wavelength dispersive X-ray analysis (WDX), are in the range of 42–48 at. % Ag, 38–42 at. % In, and 14–15 at. % RE…
A self-assembly method is developed to fabricate single-wall carbon nanotube field-effect transistors (SWNT-FETs). The electrode surface and the area between electrodes are modified with nonpolar groups (−CH3) and polar groups (−NH3+). SWNTs are selectively placed in the area between the electrodes. We achieve stabili…
The adsorption kinetics of NO 2 on a single-walled carbon nanotube (SWNT) thin-film sensor was investigated. To avoid the influence of ambient air, the adsorption property of SWNTs was explored under high vacuum. By virtue of the suppression of the influence of residual gases and the cleanness of the SWNT surface in v…
Crystallization behavior of scalable phase change materials can be studied on nanoscale structures. In this paper, high density ordered phase change nanodot arrays were fabricated using the lift-off technique on a self-assembled diblock copolymer template, polystyrene-poly(methyl-methacrylate). The size of the nanodot…
Abstract Objective —To determine the incidence and type of alterations in heart rate (HR), peak systolic blood pressure (PSBP), and serum biochemical variables (serum total bilirubin, BUN, and creatinine concentrations) associated with IV administration of ionic-iodinated contrast (IIC), nonionic-iodinated contrast (N…
The therapeutic efficiency of anticancer nucleoside analogues (NA) strongly depends on their intracellular accumulation and conversion into 5'-triphosphates. Because active NATP cannot be directly administrated due to instability, we present here a strategy of nanoencapsulation of these active drugs for efficient deli…
Single-walled carbon nanotubes (SWNTs) were chemically functionalized with amphiphilic octadecylamine after purification. Lower density and highly oriented SWNTs were obtained via Langmuir–Blodgett (LB) technique. A model was introduced to explain the compression-induced alignment. The phase behavior of the spreading…
We report the preparation and detailed structural and optical characterizations of single phase gallium doped ZnO nanopowders. A low temperature solution-based technique was developed to synthesize high-purity Zn1−xGaxO (x:0–0.05) nanopowders. Structural and optical characterization experiments were performed using x-…
In this paper we report the modified solid state synthesis of Dy and Ce activated Sr6BP5O20, Ca6BP5O20 and (CaXSr(1?X))6BP5O20 phosphors. The prepared phosphors were characterized by the x-ray powder diffraction and photoluminescence techniques. The PL excitation spectra showed the excitation peaks ranging from 300 to…
Two coumarin-based spiropyran derivatives were synthesized and characterized in two steps to explore their photochromic properties. Both prepared compounds are sensitive to UV light and change colors upon irradiation. The resulting photogenerated zwitterions revert to the original compounds while being heated. A new f…
The finite-temperature density-functional theory and quasiharmonic lattice dynamics are used to calculate the Gibbs free energy and quasiharmonic phonons of the hexagonal-close-packed (hcp) and omega $(\ensuremath{\omega})$ crystal structures for Zr. The hcp phonon dispersions agree with experiment; the $\ensuremath{\…
Motif-programming is a method for creating artificial proteins by combining functional peptide motifs in a combinatorial manner. This method is particularly well suited for developing liaison molecules that interface between cells and inorganic materials. Here we describe our creation of artificial proteins through th…
This paper presents a theoretical method for calculating the flashover voltage of ceramic and composite insulators under wet conditions. The insulator surface is assumed to be clean. A 3-dimensional computer package (Coulomb) was used to calculate the electric field of wet surfaces. The surface wettability has been va…
The grain growth and magnetic properties of Nb 2 O 5 doped NiZn ferrites prepared by a solid-state reaction method have been investigated. X-ray diffraction (XRD) patterns indicated that a single phase spinel structure was observed when the content of Nb 2 O 5 was less than 1.00 wt %. While 1.00 wt % of Nb 2 O 5 added…
Optical properties of wurtzite ZnO bulk single crystals in which an arbitrary number (typically 109–1010 cm−2) of fresh dislocations were introduced intentionally by the plastic deformation at elevated temperatures (923–1073 K) were examined. Deformed specimens showed excitonic light emission with photon energies of 3…
This study is focused in the conduction processes taking place in 0.6 wt % Gd doped lead zirconate titanate samples PbZr0.53Ti0.47O3:Gd (PZT53/47:Gd) in the vicinity of the morphotropic phase boundary. Doped samples show very large dielectric permittivity with respect to that of undoped ones near the transition temper…
The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained…
A new self-assembling bolaamphiphilic peptide has been designed and synthesized using only natural amino acids. This simple peptide is composed of two lysines connected by 4-8 alanines to maintain the characteristics of the traditional bolaamphiphiles. Based on an irregular secondary structure, it can self-assemble in…
Molecular nanomagnets, often called single-molecule magnets (SMMs), have attracted much interest in recent years both from the experimental and theoretical points of view. These systems are organometallic clusters characterized by a large spin ground state with a predominant uniaxial anisotropy. The quantum nature of…