Materials Literature
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For phase-separated multicomponent polymeric systems, characterization of the interface between the components is particularly challenging. We have observed an optical effect in the infrared that can be used to image the interface specifically. This method yields images of the interfaces based on the interfaces showin…
Phase separation (frequently called coacervation) of poly(lactide) (PLA) and poly(lactide-co-glycolide) (PLGA) is a classical method for drug microencapsulation. Here, attempts have been made to describe this process in the light of thermodynamics. Different PLA/PLGAs were dissolved in either dichloromethane or ethyl…
Mixtures of yttrium acetate hydrate (Y(O 2 CCH 3 ) 3 4H 2 O) and aluminum formate hydrate (Al(O 2 CH) 3 3H 2 O in H 2 O) or yttrium isobutyrate (Y[O 2 CCH(CH 3 ) 2 ] 3 ) and aluminum isobutyrate (Al[O 2 CCH(CH 3 ) 2 ] 3 ) in tetrahydrofuran were used as precursors to process yttrium aluminum garnet (YAG, Al 5 Y 3 O 12…
Collagen fibrils in ligaments and tendons are highly organized into parallel arrays which influence interstitial fluid transport. Finite element (FE) models were developed analogous to the fibrillar arrays in ligaments and tendons to investigate interstitial fluid flow and tissue permeability as a function of interfib…
ABSTRACT A device to objectively measure the melt/flow behavior of cheeses at different temperatures was built consisting of a temperature‐controlled heater, an LVDT (linear variable differential transformer), and a personal computer with a data acquisition system. This device, named UW Meltmeter, operates in the lubr…
In this paper we bring together and extend two recent developments in phase-field models, namely, a phase-field model of a multiphase system [I. Steinbach et al., Physica D 94, 135 (1996)] and the extension of the Cahn-Hoffman \ensuremath{\xi}-vector theory of anisotropic sharp interfaces to phase-field models [A. A.…
The formation of thin, well-ordered β-Ga2O3 films on CoGa(001) was studied by means of high resolution electron energy loss spectroscopy (EELS), scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and Auger electron spectroscopy. The crystalline β-Ga2O3 films on CoGa(001) are prepared upon ads…
The dimer potassium dioxo(citrato)vanadate(IV)-6-water, K(4){VO[O(2)CCH(2)C(O)(CO(2))CH(2)CO(2)]}(2).6H(2)O, was prepared by the reaction of citric acid and metavanadate in a neutral solution. The complex crystallizes in the space group P&onemacr; with unit cell parameters a = 8.474(5) Å, b = 8.902(7) Å, c = 9.596(9)…
A new one-step method, entitled fluidized-bed metal-organic chemical vapor deposition (FBMOCVD) of preparing highly dispersed metal-supported catalysts is reported. The following complexes were studied and used as CVD precursors in presence of H2: [Rh(μ-Cl)(CO)2]2, Rh(allyl)3, Rh(acac)(CO)2, Pd(allyl)(hfac), Pd(allyl)…
ABSTRACT The subject of stickiness is reviewed briefly in this paper, together with the factors influencing perceived stickiness in different contexts. A clear understanding of the difference between adhesive and cohesive failure mechanisms, and the factors influencing them, is a key requirement in developing successf…
The design, synthesis, and spectroscopic and chemical properties of four members of a new class of heterobifunctional photocleavable (caged) cross-linking reagents were described. One of the two reactive groups of the cross-linker reacted with amino groups to form the corresponding photolabile carbamates. Amino group…
The effect of UV curing intensity and curing time on the electro-optic behaviour and network morphology of reverse mode polymer stabilized cholesteric textures (PSCTs) has been studied. Scanning electron micrographs indicate that increasing the curing intensity generally results in a more open polymer network characte…
ABSTRACT The effects of temperature, relative humidity (%RH) and permeant concentration on aroma permeability were investigated in edible whey protein isolate (WPI) films. An orthogonal regression was performed to ascertain significance of these factors. Temperature and %RH had exponential effects on d‐limonene permea…
The Curie temperatures of lead zirconate titanate‐based (PZT‐based) composites that were incorporated with silver particles were evaluated as a function of the silver content. Although the substitution of the silver ion has been considered to decrease the Curie temperature, PZT/silver composites exhibited higher Curie…
The Brazilian National Synchrotron Light Laboratory (LNLS) has a dedicated protein crystallography beamline. The optical elements of the beamline include an elastically bent cylindrical mirror and a triangular bent-crystal monochromator, which focus synchrotron radiation at the position of the sample in the vertical a…
Monte Carlo and molecular dynamics simulations were performed to elucidate interlayer structure in hydrated Li−smectites (hectorite, beidellite, or montmorillonite with interlayer Li + ) at low water content (H 2 O/Li = 3). Previous spectroscopic studies of these stable clay mineral hydrates have led to interlayer str…
The dielectric property comparison between laser-ablated Mn-doped and undoped Ba0.6Sr0.4TiO3 (BST) thin films at low frequency (100 kHz) and at microwave frequencies has been demonstrated. The dielectric properties were characterized at low frequency using interdigital capacitors, and at microwave frequencies with cop…
Two-dimensional molecular clusters of a few tens nanometer size were found in spread monolayers of a series of partially fluorinated long-chain acids. Atomic force microscopy images have revealed that the size of the clusters is sharply monodisperse. The size changes systematically with changing structure of the hydro…
An analysis of transverse cracks induced in brittle coatings on soft substrates by spherical indenters is developed. The transverse cracks are essentially axisymmetric and geometrically conelike, with variant forms dependent on the location of initiation: outer cracks that initiate at the top surface outside the conta…
Neutron reflectivity measurements on polystyrene thin films (6.5–79.0 nm thick) supported on silicon substrates indicate that the mass density is near the bulk value regardless of film thickness. To account for possible inaccuracies arising from sample misalignment, reflectivity measurements were made both from the fr…