Materials Literature
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Abstract In situ anionic ring opening polymerization is used to prepare monomer casting polyamide 6 (MCPA6)/carbon nanotubes (CNTs) nanocomposites, whereby water is used as auxiliary dispersing agent of hydroxyl functionalized multiwalled carbon nanotubes (MWNTs‐OH) and ε‐caprolactam (CL) monomer. The MWNTs‐OH were di…
Poly(2,2′-dioxy-1,1′-biphenyl)phosphazene ( I ) is a weak base that can be reversibly protonated with HBF 4 in acetone. Acidic degradation of poly(2,2′-dioxy-1,1′-biphenyl)phosphazene was experimentally performed using HBF 4, HCl, and H 2 SO 4 yielding the same polymer I with lower molecular weights. The reaction take…
Modeling of fluid flows in crystal growth processes has become an important research area in theoretical and applied mechanics. Most crystal growth processes involve fluid flows, such as flows in the melt, solution or vapor. Theoretical modeling has played an important role in developing technologies used for growing…
The surface segregation behavior of a series of N -pentyl-perfluorooctaneamide end-capped semicrystalline poly(butylene isophthalate) films (FPBI) was investigated in this work by differential scanning calorimetry, fluorine analysis, contact angle measurements based on axisymmetric drop shape analysis-profile, angle-r…
A straightforward, facile synthesis of diamidodipyrromethenes (diamidodipyrrins, DADP (R,R')) is presented. These tetradentate ligands readily form complexes with metal ions such as Ni (2+) and Cu (2+) and can adopt different binding modes with these metals. One version of the ligand (DADP (Ph, iPr )) has been structu…
Abstract Biodegradable poly(ε‐caprolactone) (PCL) foams with a series of controlled structures were prepared by using chemical foaming method. The cell morphology was detected by scanning electron microscope (SEM). The compressive behavior of the foams was investigated by uniaxial compression test. The effect of densi…
We study the dependence of optical nonlinearities in As(2)Se(3) glass on the incident pulse-width using the Z-scan technique. In this work, 11.5-ns optical pulses from a Nd:YAG laser operating at 1.064 mum were compressed up to 1.6 ns by using stimulated Brillouin scattering in heavy fluorocarbon liquid, where the dur…
Carbon onions can be set in a state of heavy self-compression when irradiated with an electron beam. Annealing at high temperature relaxes the structure by an exchange of atoms between the shells. This gives us the possibility tostudy atom jumps quantitatively.
Percolation in nanoporous gold can be achieved with as little as 8% by volume of gold. Samples of nanoporous gold of various morphologies are analyzed with a combination of electrical and optical data. Growing thin films and complex multiply connected three-dimensional networks both display nonuniversal character. Gro…
Abstract The first stages of epitaxial growth of Na 0.5 Bi 0.5 TiO 3 on SrTiO 3 substrates were studied by means of a newly developed kinetic Monte‐Carlo (KMC) model employing several types of particles, different types of neighbors and various energy barriers. Density functional method (DFT) has been used for computi…
Abstract Chemorheological analyses of thermosetting polyurethane (PU) formulations containing various amounts of chain extender were carried out. In the first part of the present research, effect of chain extender content on the gel time and its dependency with temperature were investigated for PU formulations. Gelati…
A two-step high field anodization and a controllable barrier layer removing process have been used for the fabrication of porous anodic alumina (PAA) with different morphologies. Based on the PAAs, porous noble metal films with widely tunable pore size and inter-pore distance have been realized by a simple sputtering…
We present the results of measurements of conductivity and dielectric permittivity of the quasi-two-dimensional organic salt θ-(BEDT-TTF) 2 CsZn(SCN) 4 along the in-plane direction in a wide temperature range from room temperature down to liquid helium temperature. At temperatures below about 20 K the ac conductivity…
The intermediate valence compound Ce 2Ni 2Mg absorbs irreversibly hydrogen when exposed under 1 MPa of H 2 pressure at room temperature. The resulting hydride Ce 2Ni 2MgH 7.7 is stable in air and crystallizes as the deuteride La 2Ni 2MgD 8 in a monoclinic structure (space group P2 1 /c) with the unit cell parameters a…
We study the spin-wave excitations near the zigzag edge of graphene. It is rather interesting that we obtain a single branch of relativistic ferromagnetic magnon due to the presence of the open boundary. Note that magnons in antiferromagnets appear in pairs, while the single branch magnon in ferromagnets does not have…
Close-packed gold-nanocrystal assemblies are selectively deposited into trenches (300 nm × 300 nm) fabricated by electron-beam lithography. The base of the trenches consists of highly doped silicon with 30 nm silica walls. The assemblies are formed using electric-field mediated deposition of8 nm gold spheres from orga…
A novel paramagnetic ( S = 1/2) copper dithiolene complex based on the tfadt ligand (tfadt: 3-trifluoromethyl-acrylonitrile-2,3-dithiolate) is prepared as its n-Bu 4N (+) salt and crystallized with [Ni(cyclam)] (2+) into infinite, one-dimensional chains through CN...Ni interactions, avoiding any direct (antiferromagne…
CdS nanorods were synthesized on a large scale by thermolyzing a single-source precursor, (Me(4)N)(4)[S(4)Cd(10)(SPh)(16)], in a single surfactant system. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and x-ray powder diffraction (XRD) have been used to characterize t…
Abstract The self‐assembly of 1,3‐phenylene bis[4‐(4‐ n ‐heptyloxybenzoyloxy)‐benzoates] (BC7) is studied to examine the formation of helical morphologies from achiral banana‐shaped liquid crystal molecules at different self‐assembling levels. Various hierarchical superstructures including flat‐elongated lamellar crys…
Meetings of the Midlands Region, held at the Post House, Sandiacre, on 14 January 1973, Mr H. W. Partridge in the chair, and of the Manchester Junior Section, held at Salford College of Technology, on 1 March 1973, Mr R. I. Charlesworth in the chair. The properties of softeners are discussed briefly in relation to the…