Materials Literature
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Low targeting efficiency is one of the biggest limitations for nanoparticulate drug delivery system-based cancer therapy. In this study, an efficient approach for tumor-targeted drug delivery was developed with mesenchymal stem cells as the targeting vehicle and a silica nanorattle as the drug carrier. A silica nanora…
We have studied the thermal conductance of tilt grain boundaries in graphene using nonequilibrium molecular dynamics simulations. When a constant heat flux is allowed to flow, we observe sharp jumps in temperature at the boundaries, characteristic of interfaces between materials of differing thermal properties. On the…
Structure matters: Owing to the structure and arrangement of the [Be3B3O12F]10− group (see picture, left, Be blue, B olive, F green, O red), the mixed-cation fluorine beryllium borate NaSr3Be3B3O9F4 (right) exhibits a large second harmonic generation effect and a short UV absorption edge. Its crystals show no layering…
Co-condensation of metallophthalocyanine with an electron-deficient benzothiadiazole (BTDA) block leads to the formation of a two-dimensional covalent organic framework (2D-NiPc-BTDA COF) that assumes a belt shape and consists of AA stacking of 2D polymer sheets. Integration of BTDA blocks at the edges of a tetragonal…
We report that highly crystalline graphene can be obtained from well-controlled surface morphology of the copper substrate. Flat copper surface was prepared by using a chemical mechanical polishing method. At early growth stage, the density of graphene nucleation seeds from polished Cu film was much lower and the doma…
Recently accumulated experimental evidence for aurophilic interactions in and between molecular gold(I) compounds and the results of pertinent theoretical calculations are reviewed for the period from 2007 to mid-2011. The influence of the intra- and intermolecular bonding contacts between the closed-shell metal centr…
Abstract laminated composites on silicon or magnesium oxide substrates. The magnetoelectric voltage coefficient is calculated as function of interface coupling factor k, volume ratio of piezoelectrics to piezomagnetic, and volume ratio of substrates to composite. It was found that the magnetoelectric voltage coefficie…
Polymerization of acrylonitrile was carried out using, for the first time, the lanthanide-sodium alkoxide clusters Ln 2 (OCH 2 CH 2 NMe 2 ) 12 (OH) 2 Na 8 [Ln=Yb ( 1 ), Nd ( 2 ) and Sm ( 3 )] as single component catalysts. These heterobimetallic complexes exhibit high activity and give atactic polyacrylonitriles with…
The optical properties of ZnO/Mg 0.1 Zn 0.9 O single quantum wells with graded well width were studied using temperature-dependent photoluminescence (PL) spectroscopy. The ratio of emission intensity between the well and barrier layers was found to increase monotonically when the sample temperature was increased from…
Hematoporphyrin ( 1 ), the first compound that was tried in photodynamic therapy (PDT), contains, besides the basic porphyrin ring, two carboxyethylene groups. Photofrin, currently the most frequently used porphyrin-type compound in anticancer therapy, was obtained from hematoporphyrin ( 1 ) (Fig. 1 ) [ 1 ]. Photofrin…
Composite is a combination of a reinforcing material within a matrix material that act together to provide enhanced properties unobtainable in either single material. Often the matrix provides protection from damage and gives mechanical stability to the reinforcement under loading; at the same time the reinforcement c…
Abstract Nanoparticles of polypyrrole (PPy) in 40/60 wt % natural rubber (NR)–polystyrene (PS) blends were synthesized by emulsion polymerization using ferric sulfate [Fe 2 (SO 4 ) 3 ], sodium dodecyl sulfate (SDS), and n ‐amyl alcohol as the oxidant, surfactant, and cosurfactant, respectively. The NR/PS/PPy blends we…
In this paper we report on the growth and structural characterization of very thin (20 nm) Cr-doped ITO films, deposited at room temperature by double-target pulsed laser ablation on amorphous silica substrates. The role of Cr atoms in the ITO matrix is carefully investigated with increasing doping content by transmis…
Abstract In this research, the rheological properties of electron beam irradiated polypropylene homo polymer (PP) containing Polybutene (PB) resin and Trimethylol Propane Trimethacrylate multifunctional monomer is studied. The effect of PB resin in inducing long chain branches on the PP backbone are evaluated by vario…
We show frequency-dependent dielectric permittivity and dielectric polarization fluctuation measurements of liquid and glassy glycerol. This allows a direct comparison of both quantities determined independently. After cooling the glycerol sample to 179 K with a cooling rate of 0.85 K/min we studied the aging time dep…
Abstract Silole‐core phenylacetylene dendrimers were designed and synthesized, among them, the model compound ( n = 0) and the first generation of the dendrimer ( n = 1) were obtained by the reaction of 2,5‐dibromosilole with corresponding terminal alkynes, the second generation of the dendrimers ( n = 2) was synthesi…
In 1951, the notion of anti-ferroelectricity based on the phenomenological theory was firstly proposed by C. Subsequently, a double hysteresis (P-E) loop and a ferroelectric-antiferroelectric (FE-AFE) phase transition were observed in PbZrO 3 Since then, the double hysteresis loop, one important macroscopic effect, ha…
Magnetoelectric (ME) multiferroics are materials in which ferromagnetism and ferroelectricity occur simultaneously and coupling between the two is enabled. Applied magnetic field H gives rise to an induced polarization P which can be expressed in terms of magnetic field by the expression, P= H, where is the ME-suscept…
Abstract Plasticized corn flour‐based materials were prepared by extrusion and injection molding. Extrusion of corn flour blends (75% wet basis (wb)—glycerol (5 or 10% wb)—water) was performed in a twin‐screw extruder with either one or three shearing zones. Native corn flour is mainly composed of corn starch granules…
Experiments were carried out at the Faculty of Food Technology of Latvia University of Agriculture (LLU). Soft cheese Kleo produced in Latvia was packed in a biodegradable PLA without barrierproperties and VC999 BioPack lidding film PLA, coated with a barrier of pure silicon oxide (SiOx) and in combination with modifi…