Materials Literature
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A series of polyimide (PI)-clay-polydimethylsiloxane (PDMS) hybrid films were successfully prepared by using two different reactions, a sol—gel reaction of diethoxydimethylsilane and imidization of polyamide acid (PAA) prepared from 3,3 ′ ,4,4 ′ -biphenyltetracarboxylic dianhydride (BPDA) and p-phenylenediamine (PDA),…
We have investigated anisotropic physical properties (the magnetic susceptibility, the electrical resistivity, the thermoelectric power, the Hall coefficient and the thermal conductivity) of the single-crystalline Taylor-phase ${\text{T}\text{-Al}}_{72.5}{\text{Mn}}_{21.5}{\text{Fe}}_{6.0}$ complex intermetallic that…
We present light harvesting of aqueous colloidal quantum dots to nonradiatively transfer their excitonic excitation energy efficiently to dye molecules in water, without requiring ligand exchange. These as-synthesized CdTe quantum dots that are used as donors to serve as light-harvesting antennas are carefully optimiz…
We report the mechanical characterization of a nanocomposite thin film consisting of CdSe quantum dots (QDs) and the electroluminescent polymer poly[2-methoxy-5-2(2'-ethylhexyloxy-p-phenylenevinylene)] (MEH-PPV). The electrical and optical properties of this nanocomposite have been studied intensely for organic electr…
The melting temperature of individual electrospun polyethylene oxide (PEO) fibres was found using atomic force microscopy (AFM) topography imaging and nanomechanical measurements. The melting temperature of electrospun PEO fibres was observed to decrease with decreasing fibre diameter. A model predicting the size-depe…
Abstract This paper addresses the chemical characterisation of silicon carbide‐based grinding tools. These are among the most widely used grinding tools in the ceramic sector, and instruments are required that enable the grinding tool quality to be controlled, despite the considerable complexity involved in determinin…
Dielectric, calorimetric, and dynamic mechanical measurements were performed to delineate the types and dynamic rates of molecular scale motion in modified poly(vinylmethyl siloxane) (PVMS) stimuli-responsive networks, where pendent groups of the form −S−(CH 2 ) n −OH were chemically attached to the vinyl moiety of PV…
We report the studies of epitaxial growth of trichosanthin (TCS) crystals on a mica substrate. TCS crystals grown on mica surface are found to be aligned well in four orientations, which was induced by the lattice of the mica substrate. The effect of potassium ions both at the mica surface and in solution was investig…
Magnetotransport at low temperatures and high-magnetic fields has been used to probe the spin splitting of the electron and hole Landau bands in natural graphite. Tilting the sample in the magnetic field allows to tune the Zeeman energy and hence the spin splitting. Due to the movement of the Fermi energy in the magne…
Pure form, single phase, and highly crystalline low-silica zeolite Y was synthesized from natural nanotubular halloysite mineral by the hydrothermal method. In the synthesis process, the halloysite consisted of SiO2 and Al2O3 was used as starting material with adding supplementary silica and alumina sources. Ammonium…
The layer-by-layer (LbL) deposition technique of anionic and cationic polyelectrolytes allows formation of thin and ultrathin nanostructured films with tunable properties and, therefore, functionality. Here, we report on the synthesis and characterization of new polyelectrolyte multilayer system consisting of anionic…
A new biomimetic approach is introduced for quantum-dot synthesis in aqueous solution. The sulfide concentration gradient around the nucleating urease is controlled by the degree of inhibition of the catalytic activity, and the optimized precursor gradient on the enzyme generates monodisperse and crystalline sulfide s…
Heme is a key cofactor of hemoproteins in which porphyrin is often found to be preferentially metalated by the iron cation. In our previous work [Feng, X. T.; Yu, J. G.; Lei, M.; Fang, W. H.; Liu, S. B. J. Phys. Chem. B 2009, 113, 13381], conceptual density functional theory (CDFT) descriptors have been applied to und…
A facile method to produce high-quality ZnO nanostructures; either tetrapod (TP), nanotetraneedle (NTN) or multipod (MP) with a high degree of homogeneity for advanced field emission (FE) applications is presented. Among these nanostructures, NTN has been successfully employed to demonstrate enhanced current densities…
Explosion vaporization of a water layer of different thickness, induced by pulse heating in an inhomogeneous temperature field on the surface of a flat microheater coated with a submicron silicon-carbide layer, is experimentally studied. An optical method is used for recording the vaporization time history and dynamic…
Neste trabalho foram preparados nanocompósitos de polipropileno, polipropileno graftizado com anidrido maleico como agente compatibilizante e argila organofílica comercial (montmorilonita) de codinome Cloisite 20A em concentrações de 1,5, 2,5, 5,0 e 7,5% por meio da técnica de intercalação no estado fundido utilizando…
One advanced synthesis strategy for monodisperse silica cross-linked micellar core-shell nanoparticles (SCMCSNs) involves the use of organosilane termination agent R(n)Si(OR')(4 - n). In this study, we investigated the effects of the organosilane termination agent in the formation of SCMCSNs. Experimental data (synthe…
We study the microstructure and the effective interactions of model suspensions consisting of Yukawa-like colloidal particles homogeneously distributed in equally spaced parallel planar monolayers. All the particles interact with each other, but particle transfer between monolayers is not allowed. The spacing between…
Abstract In this study, helium/oxygen/nitrogen (He/O 2 /N 2 )‐plasma was used to etch/modify the surface of ultra‐high‐molecular‐weight polyethylene (UHMWPE) fiber. After coated with polyurethane (PU), the plasma treated UHMWPE fabrics were laminated. It was found that the values of peeling strength between the lamina…
Intestinal permeability to size-classified fish collagen peptides (FCPs) was examined using Caco-2 monolayers. Minimum-sized FCPs were most efficiently transported across the Caco-2 monolayers. Permeability depended on peptide size. It was independent of the H(+)-coupled peptide transport system but was associated wit…