Materials Literature
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Abstract Hydrophilic pyrogenic silica melt mixed in immiscible polypropylene/poly (ethylene‐ co ‐vinyl acetate) (PP/EVA) blend was found to migrate from the PP matrix to the EVA dispersed domains and remained confined inside them. Surprisingly, it was shown than silica was also able to migrate from a dispersed PP phas…
The linear electrodynamic properties of graphene -- the frequency-dependent conductivity, the transmission spectra and collective excitations -- are briefly outlined. The non-linear frequency multiplication effects in graphene are studied, taking into account the influence of the self-consistent-field effects and of t…
Quantum cutting downconversion involving the emission of two near-infrared photons for each blue photon absorbed is realized in transparent glass ceramics with embedded Pr3+/Yb3+: beta-YF3 nanocrystals. On excitation of Pr3+ ions with a visible photon at 482 nm, Yb3+ ions emit two near-infrared photons at 976 nm throu…
Despite the attractive features of nanofibrous scaffolds for cell attachment in tissue-engineering (TE) applications, impeded cell ingrowth has been reported in electrospun scaffolds. Previous findings have shown that the scaffold can function as a sieve, keeping cells on the scaffold surface, and that cell migration…
The $ϕ(\kpp)\sim \kpp$ relation is called polarization structure. By density functional calculations, we study the polarization structure in ferroelectric perovskite PbTiO$_3$, revealing (1) the $\kpp$ point that contributes most to the electronic polarization, (2) the magnitude of bandwidth, and (3) subtle curvature…
The slip phenomena in thin polymer films confined by either flat or periodically corrugated surfaces are investigated by molecular dynamics and continuum simulations. For atomically flat surfaces and weak wall-fluid interactions, the shear rate dependence of the slip length has a distinct local minimum which is follow…
In this paper we have derived Young's, Wenzel's and Cassie-Baxter's equations using conceptual model rather than showing rigorous derivation to help the new-comers in this field. We then pointed out that if the substrate is initially hydorphilic then one can modify the surface morphology and make the substrate to beco…
Light at the end of the tunnel: Two kinds of 1D microstructures, tubes and rods, were prepared from 9,10-bis(phenylethynyl)anthracene. While both types of 1D microstructures can absorb excitation light and propagate the photoluminescence (PL) emission towards the tips, the air inside the hollow tubes changes the waveg…
Multimodal nanoassemblies that contain magnetic nanoparticles, quantum dots, and the anticancer drug doxorubicin within a single PEG–phospholipid micelle were prepared (see scheme; PEG=poly(ethylene glycol)). When equipped with the targeting peptide F3, these nanostructures enable simultaneous targeted drug delivery a…
Nanoparticle colloidosomes, shown in the SEM image, are generated by using water-in-oil-in-water double emulsions as templates. Hydrophobic silica nanoparticles that are dispersed in the oil phase stabilize the double emulsions, and subsequently become the shell of the colloidosomes upon removal of the organic solvent…
Recently, the role of nanostructured materials in addressing the challenges in energy and natural resources has attracted wide attention. In particular, oriented nanostructures demonstrate promising properties for energy harvesting, conversion, and storage. In this Review, we highlight the synthesis and application of…
Molecular dynamics simulations of water, liquid beryllium fluoride and silica melt are used to study the accuracy with which the entropy of ionic and molecular liquids can be estimated from atom–atom radial distribution function data. The pair correlation entropy is demonstrated to be sufficiently accurate that the de…
The resonance modes and the related effects to the transmission of elastic waves in a two dimensional phononic crystal formed by periodic arrangements of a two blocks unit cell in one direction are studied. The unit cell consists of two asymmetric elliptic cylinders coated with silicon rubber and embedded in a rigid m…
Silks are protein-based fibers made by arthropods for a variety of task-specific applications. In this article, we review the key features of silk proteins. This article initially focuses on the structure and function of silk proteins produced naturally by silkworms and spiders, followed by the biological and technica…
Abstract Polysilsesquioxanes were obtained by hydrolysis of viologens having one or two triethoxysilyl groups, followed by their polycondensation, and anchored on the surface of an ITO electrode. The electrochromic properties of the polysilsesquioxanes were investigated and its component was optimized to enhance the c…
Poly-β-hydroxybutyrate (PHB) is synthesized by some microorganisms under stressful conditions. Despite its properties being comparable to those of synthetic polymers, and its biocompatibility and biodegradability, low productivities have dampened commercial interest in microbial PHB production. To increase production…
The isomers [Mo2Cp2(mu-kappa(1):kappa(1),eta(6)-PR*)(CO)2] (1) and [Mo2Cp(mu-kappa(1):kappa(1),eta(5)-PC5H4)(CO)2(eta(6)-HR*)] (2) (Cp = eta(5)-C5H5; R* = 2,4,6-C6H2(t)Bu3) react with [AuCl(THT)] and with the cation [Au(THT)2](+) (THT = tetrahydrothiophene) to give phosphinidene-bridged Mo2Au complexes resulting from…
The adsorption behavior of a cationic surfactant (cetyl trimethyl ammonium bromide, CTAB) in a sodium poly(styrene sulfonate) (NaPSS) brush in the presence of 1 mM NaNO 3 was investigated by ellipsometry. The interactions between surfactants and brush chains determined from these results are compared with data from ot…
A growth model of {0001} form bearing calcite crystals has been proposed in our previous papers. A detailed PBC (periodic bond chains) study demonstrated that calcite {0001} form could not be stable, owing to its K character. The stabilization involves a 2D epitaxial growth mechanism between calcium and lithium carbon…
A material-conserving analytical solubility measurement technique, with in-line reversed HPLC separation protocol, was employed to measure the mole fraction solubility of lovastatin in methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, sec -butyl acetate, tert -butyl ace…