Materials Literature
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The adhesion of wet regenerated cellulose to colloidal complexes formed between carboxymethyl cellulose (CMC) and polyvinylamine (PVAm) was evaluated by measuring the force to delaminate pairs of regenerated cellulose membranes bound together with polyelectrolyte complex. The most important parameter was the surface c…
Erbium (Er)-doped ZnO thin films were grown on fused silica (SiO 2 ) substrates by pulsed electron-beam deposition (PED) and analysed by Rutherford backscattering spectrometry (RBS), ultraviolet–visible absorption, and photoluminescence (PL). Subsequent annealing at 700 °C produces remarkable effects on the optical pr…
Abstract Melt mixed composites based on polyamide 12 (PA12) were prepared using single wall carbon nanotubes (SWNT), which were encapsulated by styrene maleic anhydride copolymer (SMA). The aim was to achieve a reactive coupling between the maleic anhydride functionality of SMA at the surface of the SWNT and the amine…
We present the results of magnetization and AC susceptibility measurements performed on ferrimagnetic Mn(3)(2+)[Cr(III)(CN)(6)](2)·12H(2)O and ferromagnetic Ni(3)(2+)[Cr(III)(CN)(6)](2)·12H(2)O systems under pressures up to 0.9 GPa in a commercial SQUID magnetometer. The magnetization process is affected by pressure:…
ZnO powders were synthesized by a precipitation method and annealed with carbon black. Electron paramagnetic resonance (EPR) and photoluminescence spectroscopies were conducted to study the characteristics of the ZnO powders. The g factor of the EPR signal shifted to lower value for the samples annealed with carbon bl…
The temperature-dependent lifetime of the green emission from Er 3+ ions in 40−50 nm Gd 2 O 3 nanocrystals has been measured and analyzed. The luminescence decay from the 4 S 3/2 state of Er 3+ shows nonexponential characteristics when excited directly to the thermally coupled 2 H 11/2 from 10 to 300 K, indicating ene…
A magnetomechanical model based on continuum thermodynamics is presented which describes the sensing effect in single-crystal ferromagnetic shape memory Ni–Mn–Ga. The model quantifies the stress and magnetization dependence on strain at different values of bias fields under isothermal conditions. A magnetic Gibbs ener…
Rare earth carbonate hydroxides, RE(CO 3 )OH, were hydrothermally synthesized from formic acid and the hydroxide gels of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Y. An orthorhombic phase with a kozoite-type structure was obtained for RE = Nd and Sm. Another orthorhombic modification of the kozoite-type structure wa…
In this paper we report polyelectrolyte multilayer films containing gold nanoparticles (AuNPs) whose spectroscopic properties can be controlled by post-treatment. When building multilayers from hydrogen-bonded poly(ethylene oxide) and polyacrylic acid-decorated AuNPs, a commonly observed red-shift of the nanoparticles…
A magnetoelectric composite consisting of a multilayer Pb(Zr,Ti)O3 piezoelectric (d33) stack and a magnetostrictive (Galfenol and∕or Terfenol-D) rod assembled in a prestressed frame in a longitudinal-longitudinal configuration has been found to have a high magnetoelectric (ME) charge coupling to an applied magnetic fi…
The thermal conductivity at 300 K of (10, 0) single-wall carbon nanotubes (SWNTs) that have been functionalized by chemical attachment of hydrogen atoms is studied by a nonequilibrium molecular dynamics (MD) method with Brenner II potential. The system exhibits a drop in thermal conductivity with functionalization. Wh…
Molecular materials of transition metal ions and organic acceptors of the general formula M(TCNX)2 M=V, Mn, Fe, Co, Ni; X=Q=7,7,8,8-tetracyano-p-quinodimethane, E=tetracyanoethylene, are known to exhibit magnetic ordering resulting from magnetic interactions between the 3d metal orbitals of the paramagnetic metal ion…
We present a systematic theoretical investigation of the thermal conductivity of naturally abundant, isotopically enriched, fast neutron irradiated single crystals of diamond, and chemical vapor deposited diamond films of different types over a large temperature range. Existing experimental data have been analyzed usi…
Reaction of the dinucleating ligand H3L (2-(2'-hydroxyphenyl)-1,3-bis[4-(2-hydroxyphenyl)-3-azabut-3-enyl]-1,3-imidazolidine) with Ni(NO3)(2).6H2O produces the dimer of monomers [Ni(HL1)]2(NO3)(2).4H2O (1.4H2O) following the hydrolysis of H3L. If the reaction occurs in the presence of 2-formylphenol (Hfp) or 2,6-difor…
Experiments were set up to test how the crystallization drop size affects the crystallization process; in the test cases studied, increasing the drop size led to increasing numbers of crystals. Other data produced from a high-throughput automation-system run were analyzed in order to gauge the effect of replication on…
This paper presents experimental investigation of nanoscale indentation formation in shape memory polymers. The polymers were synthesized by photopolymerizing a tert-butyl acrylate (tBA) monomer with a poly(ethylene glycol dimethacrylate) (PEGDMA) crosslinker. The concentration and the molecular weight of the crosslin…
A versatile method for synthesizing functionalized amorphous degradable polyesters via step growth polycondensation was investigated. A series of dicarboxylic acids and anhydrides were synthesized by Diels−Alder reactions of fumaric acid and maleic anhydride, respectively, with various dienes. The resulting difunction…
Herein, we propose a special type of periodic subwavelength structure, which is optically an effective gradient-index (GRIN) antireflective surface that also exhibits enhanced-hydrophobic behaviour.Our new concept was developed adopting both the effective medium theory (EMT) and Wenzel's wettability model.To demonstra…
Abstract Viscosity, loop tack, and peel strength of epoxidized natural rubber (ENR 25 grade)‐based pressure‐sensitive adhesive was studied in the presence of zinc oxide. The zinc oxide concentration was varied from 10–50 parts per hundred parts of rubber (phr). Coumarone–indene resin with loading from 20 to 100 phr wa…
Co doped ZnO nanoparticles were synthesized by a simple rheological phase reaction-precursors method using zinc acetate, cobalt acetate, and oxalic acid for different atomic percentages of Co doping. X-ray diffraction studies confirmed the correct phase formation, and the composition were obtained from the x-ray photo…