Materials Literature
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Work on the frequencies of mutual acoustic oscillation of finite numbers of bubbles is reviewed. In many applications in medicine, industry and nature, multiple bubbles create multiple modes of oscillation. We focus only on the linear modes established transiently on acoustic excitation. The self-consistent coupled-os…
This article presents a review of the colloidal and liquid-crystalline properties of vanadium pentoxide suspensions from a physicist's perspective. The processes occurring during the synthesis of these suspensions are first discussed. Then, the liquid-crystalline properties of V 2 O 5 sols and gels are described. Thes…
New water-soluble cationic meso-tetraarylporphyrins (TArP, Ar = 4-C(6)H(4)) and some metal derivatives have been synthesized and characterized. One main goal was to assess if N-methylpyridinium (N-Mepy) groups must be directly attached to the porphyrin core for intercalative binding of porphyrins to DNA. The new porph…
The design, synthesis, and some properties of magnetic nanocrystals of ferrite functionalized by luminescent prodendritic ligands are described. Multipotent hybrids resulting from the coupling of an inorganic nanocore (metallic, alloy, or oxide nanoparticle) embedded in an organic shell currently elicit sustained rese…
New pyridyl meso-tetraarylporphyrins (TArP, Ar = -C(6)H(4)-) of the general formula, T(R(1)R(2)NSO(2)Ar)P (R(1) = N-py-n-CH(2) (n = 2 or 4) and R(2) = CH(3)), have been synthesized by the versatile approach of utilizing meso-tetra(4-chlorosulfonylphenyl)porphyrin. After characterization by mass spectrometry and by vis…
The morphological evolution of SiO 2 /γ-Fe 2 O 3 nanocomposites was systematically synthesized in a one-step flame spray pyrolysis. Under these conditions, a gradual transformation from discrete γ-Fe 2 O 3 nanoparticles to thin SiO 2 coatings, segregated single γ-Fe 2 O 3 core, and multiple γ-Fe 2 O 3 cores within a S…
The dielectric properties of multiferroic ${\text{BiMnO}}_{3}$ 50 nm epitaxial thin films grown on Nb-doped ${\text{SrTiO}}_{3}$ (001) substrates were analyzed by impedance spectroscopy between 55 and 155 K. One single intrinsic thin film dielectric relaxation process was deconvoluted from an extrinsic electrode inter…
This study evaluates the usage of waste newspaper as a supplement raw material for laboratory-made single-layer particle-boards. The boards were made of various ratios (75/25, 50/50, 25/75 and 0/100) of waste paper flakes to wood particles mixtures (wt/wt). The effects of press temperature and maleic anhydride on the…
We demonstrate that the ratio of group to phase velocity has a simple relationship to the orientation of the electromagnetic field. In nondispersive materials, opposite group and phase velocity corresponds to fields that are mostly oriented in the propagation direction. More generally, this relationship (including the…
This investigation deals with the property characterization of polymeric composites from abundantly available and renewable jute fibers. The aim of this article is to explore the possibility of using carpet waste jute yarn for value added fiber-reinforced composite materials and to investigate the physical and mechani…
Uncontrolled fibrous protein aggregation is implicated in a range of aberrant biological phenomena. Much effort has consequently been directed towards establishing quantitative in vitro assays of this process with the aim of probing amyloid growth in molecular detail as well as elucidating the effect of additional spe…
Onconase (ONC) is a member of the ribonuclease A superfamily that is toxic to cancer cells in vitro and in vivo. ONC is now in Phase IIIb clinical trials for the treatment of malignant mesothelioma. Internalization of ONC to the cytosol of cancer cells is essential for its cytotoxic activity, despite the apparent abse…
The synthesis and characterization of organometallic oligomers of the type [(p-C(6)H(4))C[triple bond]CPt(P(n-Bu)(3))(2)C identical withC(p-C(6)H(4))Zn(P)](n) with the corresponding models [(C(6)H(5)C[triple bond]C)Pt(P(n-Bu)(3))(2)C[triple bond]C(p-C(6)H(4))Zn(P)(p-C(6)H(4))C[triple bond]CPt(P(n-Bu)(3))(2)(C[triple b…
The synergistic effects of Fe 2 O 3 with layered double hydroxides (LDH) in ethylene vinyl acetate copolymer/LDH (EVA/LDH) composites have been studied using limiting oxygen index (LOI), UL-94 tests, and cone calorimeter test (CCT). The results from the LOI and UL-94 tests show that the Fe 2 O 3 can also act as flame…
The atomic and electronic structures of the $\ensuremath{\gamma}{\text{-Al}}_{2}{\text{O}}_{3}$ (001) surface are studied using the density-functional theory approach. From calculated surface energies for different surface terminations, we identified a mixed dense Al-O (001) layer, containing both octahedral aluminum…
Polyamide (nylon) 11 (PA11) and 12 (PA12) were melt-blended, dispersing low concentrations of nanoparticles, namely nanoclays (NCs), carbon nanofibers (CNFs), and nanosilicas (NSs) via twin-screw extrusion. To enhance their thermal and flame-retardant (FR) properties, an intumescent FR additive was added to the mechan…
Fibronectin (FN) fibrillogenesis is a cell-mediated process involving integrin activation that results in conformational changes of FN molecules and the organization of actin cytoskeleton. A similar process can be induced by some chemistries in the absence of cells, e.g., poly(ethyl acrylate) (PEA), which enhance FN-F…
The extinction spectra of 5-nm thick, triangular silver nanoprisms are calculated using the discrete dipole approximation (DDA) method. The calculations are proved to accurately converged by satisfying the usual criteria related to the applicability of the DDA. The ultrathin thickness of the nanoprisms considered here…
High temperature ceramics with porosity on multiple length scales offer great promise in high temperature catalytic applications for their high surface area and low flow resistance in combination with thermal and chemical stability. We have developed a bottom-up approach to functional, porous, high-temperature ceramic…
Fluorescence correlation spectroscopy (FCS) was employed to study the diffusion of molecular tracers in different polymer melts (polydimethysiloxane (PDMS), 1,4- cis -polyisoprene (PI), poly(vinylethylene) (PVE), and a symmetric PI/PVE blend) as a function of molecular weight ( M w ) and temperature ( T ). The single…