Materials Literature
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Oil palm fiber is an important lignocellulosic raw material for the preparation of cost-effective and environment-friendly composite materials. The morphology and properties of these fibers have been analyzed. The properties of two important types of fibers, the oil palm empty fruit bunch fiber and the oil palm mesoca…
Chitosan films were grafted with N,N ′-dimethylaminoethylmethacrylate using the 60Co gamma irradiation method. The effect of solvent composition, monomer concentration, dose rate, and total dose on grafting was studied. The solvent composition has a marked effect on the degree of grafting. Maximum yield was obtained i…
The dependency of the density of poly(ϵ-caprolactone)-polycarbonate (PCL-PC) blends on composition has been studied. PCL/PC blends are typical of miscible blends containing crystallizable components, and miscibility is therefore considered with respect to the amorphous phase. In literature, a single glass transition t…
Acrylic acid (AA) was grafted to cellulose by using ceric ammonium nitrate (CAN) initiator in aqueous nitric acid solution at 30, 50, 70, and 90°C during reaction periods of 30 to 180 minutes. About 45% of the AA was polymerized at 90°C after 180 minutes. The grafted polymer and homopolymer were isolated by acetone fr…
Oil palm fiber is an important lignocellulosic raw material for the preparation of cost-effective and environment-friendly composite materials. The morphology and properties of these fibers have been analyzed. The properties of two important types of fibers, the oil palm empty fruit bunch fiber and the oil palm mesoca…
The lyotropic liquid crystalline phases of surfactants exhibit a rich polymorphism of structures that have long-range periodicities and whose characteristic repeat distances range from 2 to 15 nanometers. The electrochemical reduction of platinum salts confined to the aqueous environments of these phases leads to the…
Three viscoplastic approaches are examined in this paper.First, the overstress viscoplastic models (i.e. the Perzyna model and the Duvaut-Lions model) are outlined.Next, a consistency viscoplastic approach is presented.In the consistency model a rate-dependent yield surface is employed while the standard Kuhn-Tucker c…
Three viscoplastic approaches are examined in this paper. First, the overstress viscoplastic models (i.e. the Perzyna model and the Duvaut–Lions model) are outlined. Next, a consistency viscoplastic approach is presented. In the consistency model a rate-dependent yield surface is employed while the standard Kuhn–Tucke…
A highly conjugated dimer of nickel(II) octaethylporphyrin linked by a butadiyne bridge on a meso position has been used for the deposition of Langmuir−Blodgett (LB) films in mixture with arachidic acid. Similar porphyrin derivatives have never been used before as the active layer in gas sensors. Linearly polarized li…
This study examines a central tenet of the “membrane−micelle” model of humic substances that humic molecules form “micelle-like” aggregates with hydrophobic interiors into which nonpolar organic compounds partition. We solubilized atrazine, labeled by a trifluoromethyl group on the ethylamino side chain, in aqueous so…
A carbonaceous material (Black Pearls 2000) was used for measurements of heat of immersion in water, formamide, n -dodecane, benzene, bromoform, and diiodomethane. Using the values obtained and the adsorption data from the literature, the Lifshitz−van der Waals component and the electron-acceptor and electron-donor pa…
The binding of fluorescent probe molecules to poly(amidoamine) starburst dendrimers of generations G-0, G-1, and G-2 was investigated. The solubilizing capability of these new materials, in aqueous media, increases with increasing degree of their generation. Pyrene fluorescence however undergoes significant quenching…
Functionalized self-assembled monolayers (SAMs) of alkanethiolates on gold were used to study citrated human plasma protein adsorption by ellipsometry and antibody techniques in vitro . The aspiration is to gain knowledge about how surface properties affect such events like coagulation and complement activation, which…
The electronic structure of pyramidal shaped InAs/GaAs quantum dots is calculated using an eight-band strain dependent $\bf k\cdot p$ Hamiltonian. The influence of strain on band energies and the conduction-band effective mass are examined. Single particle bound-state energies and exciton binding energies are computed…
The effect of pressure on acceptor levels and hole scattering mechanisms in p-GaSe is investigated through Hall effect and resistivity measurements under quasi-hydrostatic conditions up to 4 GPa. The pressure dependence of the hole concentration is interpreted through a carrier statistics equation with a single (nitro…
We present a general procedure for obtaining progressively more accurate functional expressions for the electron self-energy by iterative solution of Hedin's coupled equations. The iterative process starting from Hartree theory, which gives rise to the GW approximation, is continued further, and an explicit formula fo…
Volume is indexed by Thomson Reuters CPCI-S (WoS).The present book provides a timely update to the current understanding of degradation processes in high-temperature materials, as related to chemical interactions with the environment.The methods used to combat this degradation - particularly by means of protective coa…
In the binary glass system, a change of structural regime takes place near the composition . The presence of this topological threshold is established by direct and indirect evidence, such as peculiarities in the compositional dependence of the Raman vibrational modes, optical band-gap energy and drift mobilities of g…
By using large oil-in-water droplets covered with ionic surfactant we measure contact angles to deduce the adhesive energy between macroscopic interfaces as a function of the temperature $T$ and the salt concentration $C$. A wetting transition takes place at a well defined temperature ${T}^{*}(C)$. At the colloidal sc…
Single mode channel waveguides were fabricated in soda lime glass by poling the samples at 280 °C with 2.5 kV bias voltage. The refractive index of the glass was reduced by 1.5% due to the depletion of sodium ions, making possible the formation of waveguides in a depressed cladding configuration.