Materials Literature
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Cytotoxic properties of plant extracts and drugs being developed for cancer treatment are usually evaluated by a variety of in vivo and in vitro tests carried out in animal or plant based models. In the present study we have evaluated the possibility of using the germinating mung beans (Vigna radiata), for rapid and i…
Solid oxide fuel cell (SOFC) cathodes consisting of and ( , Sm, Gd) were investigated with the ac impedance method. The interface resistance of cathodes with Pr-doped ceria was approximately one-third of those with Sm- and Gd-doped ceria. Cathodes with Pr-doped ceria had frequency peaks in the imaginary part impedance…
OBJECTIVE: To determine the feasibility of labeling human mesenchymal stem cells (hMSCs) with bifunctional nanoparticles and assessing their potential as imaging probes in the monitoring of hMSC transplantation. MATERIALS AND METHODS: The T1 and T2 relaxivities of the nanoparticles (MNP@SiO(2)[RITC]-PEG) were measured…
This paper reports the successful creation of a new ultracapacitor structure that offers a capacitance density on the order of 100 to 200 Farads per cubic centimeter; versus the current state of the art capacitance density of 1 F/cm(3). The principle behind the new ultracapacitor structure is the insertion of a few na…
Acidic proteins are generally thought to control mineral formation and growth in biocalcification. Analysis of proteinaceous components in the soluble and insoluble matrix fractions of sclerites in Sinularia polydactyla indicates that aspartic acid composes about 60% of the insoluble and 29% of the soluble matrix frac…
In this study, we investigated the effect of amine- and hydroxyl-terminated Generation 2 and 3 (G2 and G3) poly(amidoamine) (PAMAM) dendrimers on the viability and induction of apoptosis in human MCF-7 and MDA-MB-231 breast cancer cells. It was shown that amino-terminated PAMAM dendrimers were cytotoxic, with IC50 val…
Towards an integrated multifunctional nanocarrier, core-shell nanostructures have been developed using the electrostatic self-assembly of an organic shell onto magnetic nanoparticles.
Novel photochromic coatings were designed having a remarkable long-term stability of both the coloured state and colourless states in the dark (bistability). The coatings consist of a dispersion of a commercial spirooxazine in a functionalized sol–gel hybrid matrix, acquiring a deep purple coloration upon irradiation…
Cubic ZrW2O8 is a negative thermal expansion (NTE) material that is of interest as filler in controlled thermal expansion composites. It is easily accessible from a hydrated precursor, ZrW2O7(OH)2·2H2O, which can be obtained by hydrothermal synthesis. Different reaction conditions were investigated to gain control ove…
Phthalocyanines are organic-based materials which have attracted a lot of research in recent times. In the field of sensors, they present interesting and valuable potentialities as sensing elements for real gas sensor applications. In the present article, and taking some of our experiments as representative examples,…
Few attempt to study the effects of chemical functionalized carbon nanotubes (CNTs) on the electrical conductivity of nanocomposites, instead to increase dispersion and interfacial bonding strength between CNTs and polymer matrix for improvement of mechanical properties. Therefore, in this study the electrical conduct…
Controlling the shape and composition of metal nanocrystals can be beneficial for tuning the optical or catalytic properties in a variety of applications. In this study, surface-specific overgrowth of platinum was found on shaped gold nanocrystals of cubes, octahedra and spheres. Platinum overgrowth was observed on th…
Significant charge separation and potential-dependent photocurrent polarity switching are reported at multilayers of polyacrylate-capped CdS quantum dots (Q-CdS, d = 3.6 +/-0.5 nm) assembled in poly(diallydimethylammonium chloride) with an alkaline sulfide solution interface. The films were deposited by dip self-assem…
The deformation behaviour of β titanium alloy Ti-20V-4Al-1Sn sheet at 1073 K was investigated by performing uniaxial tension experiments. The stress-strain curves show a sharp yield point and the subsequent abrupt yield drop followed by the strain softening. From the EBSD analysis, a crystallographic misorientation wa…
Reaction of the cyclic {P(8)W(48)} polyoxotungstate host with sodium molybdate in solution in the presence of a reducing agent leads to the formation and stabilization of unprecedented neutral {Mo(V)(4)O(10)(H(2)O)(3)} aggregates with handle function, thereby proving the potential of the present host for performing fu…
Intragranular deformation mechanisms were investigated for ambient-temperature creep of pure hexagonal close-packed (h.c.p.) metals, i.e. commercially pure titanium, pure magnesium and pure zinc, by transmission electron microscopy and electron back-scatter diffraction pattern mapping analysis. First, straightly align…
We report total internal reflection fluorescence microscopy (TIRFM) measurements using an atomic force microscope (AFM) probe to investigate the quantitative fluorescence profiles of CdSe/ZnS nanocrystals (NCs), which interact with gold surfaces, as a function of the gold-NC distance. First, a silica bead was glued to…
Conjugated polymers ͑CPs͒ continue to be of interest for use as components of corrosion control coatings.For aluminum alloys, however, there is controversy and uncertainty regarding the protection mechanism͑s͒, or indeed even whether corrosion protection by a CP is possible.Recent results from our laboratory indicate…
The 2,1,3-benzothiadiazolidyl radical anion 1 was isolated for the first time in the form of the thermally stable salt [K(THF)][1], which was structurally characterized by X-ray diffraction.
Co-assembly of ditopic perylene bisimide and azobenzene-functionalized melamine occurs with an unconventional stoichiometric ratio, providing well-defined nanostructures with a helically-coiled architecture where perylene chromophores are packed in desirable J-type arrangements.