Materials Literature
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This paper describes the preparation and characterization of blend films composed of regenerated silk fibroin (SF) and poly(lactic acid) (PLA). FT-IR and XRD of the SF/PLA blend films with different ratios indicated that the secondary structural transition of SF from Silk I to Silk II was induced upon blending with PL…
A fluorescent indicator (FI) can be used to monitor the underlying corrosion on metal substrates based on sensing pH changes caused by corrosion reactions. One coumarin derivative was chosen as FI and added to a coated-aluminum system. The initial state of the coating system is fluorescent under UV light and it change…
Au-framed Ag nanocubes were prepared by site-selective electrochemical deposition of Au onto the edges and vertices of Ag nanocubes modified with a self-assembled monolayer (SAM) of 1-octanethiol, and further chemical etching of the Ag cubes used as a template produced Au nanoframes.
Recently, a multivariate statistical analysis (MSA) package has been developed. In this article, the basic concept of principal component analysis (PCA), which is one of the most common MSA approaches, is described. An application of the package to an STEM atomic-column electron energyloss spectrum-imaging dataset of…
In general, nanofibres can be formed using the electrospinning technique, which has been known for a long time in literature. However, there are still some problems related to this technique such as low production rate, capillary clogging, etc. In recent years, several new electrospinning methods have been developed t…
A natural mineral from Santa Marta-Colombia used as the starting material in the synthesis of pillared clays has been characterized by several techniques, including X-ray diffraction, X-ray fluorescence, electronic paramagnetic resonance, aluminum nuclear magnetic resonance and scanning electron mi croscopy. The infor…
Here we report on a new route to synthesize colloidal silver and gold nanoparticles, potentially scalable for massive nanoparticle-production. This method is based on the microwave-assisted heterogeneous reduction of the metal salts with polyvinylalcohol. The reaction is carried out in alcohols, which are non-solvents…
The gelation and fractal characteristics of polyacrylonitrile (PAN) in a mixed solvent of DMSO and water were investigated using rheological approaches. The results of steady-shear rheology showed that the gelation behavior of PAN solution was very sensitive to the water content in the solution. Furthermore the formed…
The redox properties of sumanene C(21)H(12) and its concave Fe(II) complex [(eta(5)-C(5)H(5))Fe(eta(6)-C(21)H(12))](+) have been elucidated through an electrochemical study in non-aqueous solvents, i.e. N,N-dimethylformamide (DMF) and acetonitrile (MeCN). The electron transfer activity of sumanene can be depicted as a…
The cellular uptake efficiency of nanoparticles depends mainly on the surface characteristics of these materials. In this study, amine- and ester-terminated polyamidoamine (PAMAM) dendrimers were used to functionalize fluorescein-doped magnetic mesoporous silica nanoparticles (FMNPs) to evaluate the effect of surface…
New Schiff base ligands with two metal binding sites have been prepared. Copper and zinc complexes of the ligands, which serve as models for rigid, conjugated metallopolymers, were synthesized and characterized. The copper complexes display only weak intramolecular antiferromagnetic interactions, suggesting that the p…
Silica substrates were functionalized with a covalent 4-ClCH2C6H4SiCl3 monolayer. Additional covalent bonding of the tris(dibenzoylmethane) mono(5-amino-1,10-phenanthroline)europium (III) to the silylated substrates was further achieved. The optical properties of this robust monolayer system were studied at room tempe…
Nickel ferrite, Ni_xCo_{1-x}Fe_2O_4, NPs (where x = 0.0, 0.6 and 1.0) were successfully synthesized by a rapid and reproducible CTAB-assisted hydrothermal route. The influence of different hydrolyzing agents on the particle size and magnetic behavior of Ni_xCo_{1-x}Fe_2O_4 NPs was investigated. Particles showed very h…
We report here the preparation of ZnO/polythiophene-based conjugated polymer nanocomposites that retain especially highly luminescent (Φf > 0.5) and semiconductive properties without the addition of capping agents. The as-prepared nanocomposites have been well characterized by UV-Vis, fluorescence, TEM/EDS, etc. This…
Poly(4,4′-diphenylenevinylene) rotaxanes and [2]rotaxanes with α-, β-, γ-cyclodextrin macrocycles were synthesised and their sensitivities to fluorescence quenching by methyl viologen in aqueous solution were determined, relative to uninsulated analogues. Stern–Volmer analysis revealed that the fluorescence quenching…
We report on the fabrication and characterization of layer-by-layer stacked MnO x – RuO 2 nanofiber mats via co-electrospinning and their potential application for electrochemical capacitors. The morphology of multistacked MnO x – RuO 2 fiber mats provides high porosity for the efficient permeability of electrolyte in…
The reactivity of organic radicals produced by 1,1'-azobis(cyanocyclohexane) (ACN) is tuned to selectively suppress electrical conduction of small diameter single-walled carbon nanotubes, and the modified tubes are able to produce high-mobility (approximately 10 cm2 V(-1) s(-1)) and solution-processable thin-film tran…
Some iturin A-producing strains of Bacillus subtilis will elaborate the novel fluorinated analogue when incubated with 3-fluoro-L-tyrosine. The activity of iturin A is dependent on the D-tyrosine residue and the presence of fluorotyrosine may result in an improvement of the biological properties of this lipopeptide. T…
A sputter-prepared Ru (7 nm)/ (8 nm) stacked layer was investigated as a diffusion barrier layer between Cu and Si for direct-plateable Cu interconnects, and its performance was compared with that of a Ru single layer with the same thickness (15 nm). X-ray diffractometry and sheet resistance measurements showed that t…
Co-sublimation of the two dithiadiazolyl radicals [PhCNSSN]2 (1)2 and [C6F5CNSSN]2 (2)2 yielded the mixed π*–π* dimer [PhCNSSN][C6F5CNSSN] (3) exhibiting aryl–perfluoroaryl π–π interactions.