Materials Literature
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Four modified starches, including gelatinized starch (GS), crosslinked starch (CS), oxidized starch (OS) and esterified starch (ES), were blended with polyethylene-octene elastomer (POE) at 20 wt% starch content. The graft copolymer POE-g-MAH acted as a compatibilizer where 5 wt% was added to POE and various starch bl…
Abstract The grafting of maleic anhydride onto carbon black surface based on the Diels–Alder addition via ultrasonic irradiation was investigated. Fourier transform infrared spectroscopy (FT‐IR) and thermogravimetric analysis (TGA) were used to determine the chemical structure of the resulting products. The anhydride…
Back-etch methods have been widely used to prepare plan view transmission electron microscopy (TEM) samples of thin films on membranes by removal of the Si substrate below the membrane by backside etching. The conventional means to determine when to stop the etch process is to observe the color of the light transmitte…
In the present work, a new kind of protein-loaded layer-by-layer (LbL) film based on nanoparticles was fabricated on electrodes. First, oppositely charged SiO(2) nanoparticles and poly(diallyldimethylammonium) (PDDA) were alternately adsorbed on solid surfaces, forming {PDDA/SiO(2)}(n) LbL films. In the next step, the…
Incorporating the vacancy electromigration theory into the switching-induced charge-injection mechanism into the local phase decomposition model has led to an analytical model for the dielectric fatigue behavior and the remnant polarization in perovskite structured ferroelectric thin films. The model has allowed us to…
Abstract Addition of In and Ag into eutectic Sb 70 Te 30 fast‐growth material was studied. We explored the optical transitions and crystallization kinetics of Sb 70 Te 30 and Ag 3 In 5 Sb 60 Te 32 recording films. The results showed that Ag 3 In 5 Sb 60 Te 32 has a higher crystallization temperature but a similar melt…
Fe–Mn–Si-based shape memory alloys are characterized by a good shape-memory effect, but with a modest corrosion resistance. The goal of this study is to try out a suitable surface treatment in order to improve the corrosion resistance of the Fe–32Mn–6Si alloy without impairing its shape-memory properties. The implemen…
Abstract It is shown that ZnO nanorods grown by MOCVD exhibit enhanced radiation hardness against high energy heavy ion irradiation as compared to bulk layers. The decrease of the luminescence intensity induced by 130 MeV Xe +23 irradiation at a dose of 1.5 × 10 14 cm –2 in ZnO nanorods is nearly identical to that ind…
The interactions of the noble gases with a graphene sheet are investigated theoretically. The short range repulsive interaction between the noble gas and each carbon atom is described using Hartree-Fock atomic densities and a local density functional theory with the exchange functional corrected for the finite range o…
We have determined the energy level alignment at interfaces between La0.7Sr0.3MnO3 and two typical organic semiconductors, copper-phthalocyanine and α-sexithiophene. La0.7Sr0.3MnO3 thin films have been grown using pulsed laser deposition and subsequently ex situ cleaned before the organic materials have been deposited…
The major objectives of this work are to understand the effects of organoclay, its extent of exfoliation and orientation, and indenter geometry on the scratch characteristics of polyamide 6/organoclay nanocomposites. Two different organically treated clays are used for this purpose and their structural parameters in a…
We report a comprehensive first-principles study of the thermodynamics of the hydrogen release reaction from xLiH–yMg(NH2)2 mixtures involving the composition ratios (x=2, y=1), (x=8, y=3), and (x=12, y=3), with special emphasis on the effect of the different intermediate steps. For all three mixing ratios of LiH∕Mg(N…
The capacitance of PbZrO 3 –Pb(Zr 0.8 Ti 0.2 )O 3 epitaxial multilayers is significantly enhanced as the number of interfaces increases at the same total thickness of the structure. A possible explanation for this enhancement can be the increase of the dielectric susceptibility due to the presence of some interfacial…
We report on the controlled manipulation of two, three and four gold nanoparticles (AuNPs) using an atomic force microscope (AFM) for use as surface-enhanced Raman scattering substrates. For each arrangement, the interparticle electromagnetic (EM) coupling between adjacent AuNPs is studied at different polarization an…
Multiwalled carbon nanotubes (MWNTs) were manipulated inside a high-resolution transmission electron microscope combined with a nano manipulator, and a single MWNT emitter freestanding on a platinum surface was fabricated by nanowelding. The electron field emission properties of the single MWNT were in situ measured a…
Lattice parameter profiles and the chemical structure of InP self-assembled islands grown on GaAs(001) were determined with x-ray resonant scattering. By accessing four different photon energies, near x-ray absorption edges of two of the atomic species present on the samples, composition maps of all four atomic consti…
Abstract New polymeric ligand (resin) was prepared by the condensation of thiosemicarbazides with formaldehyde in the presence of acidic medium. Thisemicarbazide–formaldehyde polymer–metal complexes were prepared with Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) in 1:2 metal:ligand molar ratio. The polymeric ligand and i…
Ethylene vinyl acetate (EVA)/natural rubber (SMR L)/organoclay thermoplastic elastomer nanocomposites were melt compounded in an internal mixer, Haake Rheometer, at 120°C at a rotor speed of 50 rpm. The thermoplastic elastomer nanocomposites were dynamically vulcanized using sulfur and peroxide systems. In this articl…
Abstract A series of ZnMgO thin‐film nanophosphors with varied Zn:Mg ratio has been prepared by chemical bath deposition. The structure, photoluminescence, time‐resolved decay and chromaticity of the films are presented. ZnMgO films absorb light efficiently in the near UV (330–400 nm) and the emission covers a large p…
A violet luminescence band at 3.1099eV was observed at 12.5K in phosphorus-doped ZnO epitaxial films deposited by O2 plasma-assisted pulsed laser ablation. The band results from a transition between a shallow donor and a deep acceptor induced by phosphorus doping. The activation energy of the acceptor varies with the…