Materials Literature
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We show that elastic interactions of an array of self-assembled quantum dots in a parent material matrix are markedly distinct from the elastic field created by a single point defect, and can explain the observed abrupt correlation--anticorrelation transition in semiconductor quantum dot stacks. Finite volume effects…
Melting is analyzed dynamically as a problem of localization at a liquid-solid interface. A Lindemann-like criterion of melting is derived in terms of particular vibrational amplitudes, which turn out to equal a universal quotient (about one-tenth) of the molecular spacing, at the interface. The near universality of t…
Fluid phase endocytic uptake of external solutes in plant cells was further substantiated using artificial polystyrene nano-spheres (40 nm) and CdSe/ZnS quantum dots (20 nm). Both types of artificial nano-particles were taken up by sycamore-cultured cells. However, whereas polystyrene nano-spheres were delivered to th…
Single-walled carbon nanotubes (SWNTs) suspended in air over trenches are imaged using their intrinsic near-infrared (NIR) photoluminescence (1.0-1.6 microm). Far-field emission from extended suspended lengths (approximately 50 microm) is both spatially and spectrally resolved, and SWNTs are classified based on the sp…
Abstract Nanoparticles of gold supported on nanocrystalline CeO 2 catalyse the isomerisation of ω‐alkynylfurans to phenols. Initial leaching of gold was observed, which could be minimised by calcining. Subsequent runs showed that once all soluble species had leached, the surface‐bound, cationic gold species is still a…
We investigated the presence of plasmalemma‐bound copper‐containing oxidases associated with the inducible iron (Fe) transport system in two diatoms of the genus Thalassiosira . Under Fe‐limiting conditions, Thalassiosira oceanica , an oceanic isolate, was able to enzymatically oxidize inorganic Fe(II) extracellularly…
The influence of ion modification using rare-earth cations on crystal structures, along with the insulating and ferroelectric properties of BiFeO3 (BFO) thin films was investigated. Rare-earth-substituted BFO films with chemical compositions of (Bi1.00−xREx)Fe1.00O3 (x=0–0.15, RE=La and Nd) were fabricated on (111)Pt∕…
In this paper, we propose a new diffuse interface model for the study of three immiscible component incompressible viscous flows. The model is based on the Cahn-Hilliard free energy approach. The originality of our study lies in particular in the choice of the bulk free energy. We show that one must take care of this…
A biomaterial scaffold acting as a functional substitute for the native extracellular matrix provides space for cell accommodation. In this study, we seeded chondrocytes, isolated from 4- to 6-month-old calves, in 2 types of poly(L-lactide) scaffolds, composed of micro- and nanofibers, and compared the effects on cell…
Anticancer drug combinations can act synergistically or antagonistically against tumor cells in vitro depending on the ratios of the individual agents comprising the combination. The importance of drug ratios in vivo, however, has heretofore not been investigated, and combination chemotherapy treatment regimens contin…
Abstract The immobilization of catalytic groups onto a dendritic support either at the core or at the periphery gives rise to unique properties that affect rates of reaction, substrate activation or selectivity, etc. When advantageous, these properties can be classified as a positive dendrimer effect. Positive dendrim…
We present quantitative predictions of the performance of nanotubes and nanowires as antennas, including the radiation resistance, the input reactance and resistance, and antenna efficiency, as a function of frequency and nanotube length. Particular attention is paid to the quantum capacitance and kinetic inductance.…
CeO2 nanocubes (and nanorods) enclosed by six {200} planes with controlled sizes have been prepared through a facile one-pot method. The nanocubes have a strong tendency to assemble into 2D and 3D arrays with regular patterns on a substrate, which is probably driven by the dipole-dipole interaction of polar {200} plan…
P.A. Sims, D.G. Mann and L.K. Medlin. 2006. Evolution of the diatoms: insights from fossil, biological and molecular data.Phycologia 45: 361–402. DOI: 10.2216/05-22.1Molecular sequence analyses have yielded many important insights into diatom evolution, but there have been few attempts to relate these to the extensive…
Cavities on a proteins surface as well as specific amino acid positioning within it create the physicochemical properties needed for a protein to perform its function. CASTp (http://cast.engr.uic.edu) is an online tool that locates and measures pockets and voids on 3D protein structures. This new version of CASTp incl…
Abstract— Results of the investigation of film polarizers on a base of polyvinyl alcohol and azobenzeneazonaphtalene dyes are presented. The dependence of the light stability of these polarizers on the structure and concentration of a dye, the stretching and conditions of the chemical treatment of films, as well as th…
The structure, magnetic properties and martensitic transformation behaviour were investigated for as-spun Co 50 Ni 20 Ga 30 ribbons under various heat-treatment conditions. When the as-spun ribbons were annealed at 400 °C, the saturation magnetization decreased from 49.5 to 40.1 emu g −1 and the coercivity increased f…
Lead zirconate titanate [Pb(Zr0.52Ti0.48)O3, PZT] thin films were deposited on Pt (111)/Ti/SiO2/Si and Pt (200)/Ti/SiO2/Si substrates by sol-gel method. Pyrolysis temperature and time were used to control the orientation of the thin films. A PbO buffer layer was also used to enhance the growth of (100)/(001) orientati…
Mathematically, the problem considered here is that of heteroclinic connections for a system of two second order differential equations of Hamiltonian type, in which a small parameter \epsilon conveys a singular perturbation. The motivation comes from a multi-order-parameter phase field model developed by Braun et al…
The deflection and time response of shape memory alloy laminated composite plate are studied using first order shear deformation theory. The composite plate consists of a thin layer of shape memory alloy bonded to an elastomer layer. The governing equations of the plate are developed using the energy balance equations…