Materials Literature
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This paper reports the facile preparation of gels of guar gum (GG) with an ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl), from the solutions of GG in BMIMCl in various concentrations by heating–cooling process. The mechanical properties of the gels were evaluated by stress–strain curves under both compre…
The excitation of an antisymmetric trapped mode on a symmetric metamaterial resonator is experimentally demonstrated.We use an active electronic device to break the electrical symmetry and therefore to generate this trapped mode on a symmetric spilt ring resonator.Even more, with such a tunable mode coupling resonator…
The vibrational properties of the trimeric iron complex [Fe(3)(4-(2'-hydroxy-ethyl)-1,2,4-triazole)(6)(H(2)O)(6)](CF(3)SO(3))(6) which serves as a model of the 1D iron coordination polymers based on 1,2,4-triazoles have been investigated by nuclear inelastic scattering of synchrotron radiation (NIS), as well as by Ram…
New layered hybrid organic-inorganic materials were obtained directly by hydrolysis and polycondensation of monosilylated precursors of type (EtO)(3)Si(CH(2))(3)NH(C=O)NHC(n)H(2n+1) (n = 3, 8, 12 and 16). These precursors were easily prepared by reaction between commercially available triethoxysilylpropylisocyanate an…
The impact of high-intensity laser radiation on a polymer in vacuum is accompanied by the release of gaseous products of degradation and, in some cases, of clusters of the partially destroyed polymer. Polytetrafluoroethylene (PTFE) exhibits an abnormal behavior in this process: being exposed to continuous CO 2 laser r…
We describe the preparation of magnetic silica nanocomposite millimetric beads using alginate as a green biopolymer template. The simple and soft method which is used here is particularly suitable since the alginate template allows a multiscale control of the structure of the material, both its morphological character…
Structural investigation of the coil–rod–coil molecules reveals that side chains, methyl and ethyl groups in the middle of the rod segment, dramatically influence the self-assembly behavior.
The binding energies of multiple CO molecules to five-atom silver-gold cluster cations have been obtained employing temperature dependent gas phase ion trap measurements and ab initio calculations. The CO binding energies to Ag(n)Au(m)(+) (n + m = 5) decrease with increasing number of silver atoms. Most strikingly, af…
Synthesis of new heterometallic layered magnets with controlled chirality have been achieved by insertion of chiral and non-chiral salen-type Ni(II) complexes into copper and cobalt layered simple hydroxides.
Dendrimers are polymers with unique properties that make them promising in a variety of applications such as potential drug and gene delivery systems. PAMAM dendrimers, in particular, have been widely investigated and are efficiently translocated into the cell. The mechanism of translocation, however, is still unknown…
Electron donor-acceptor compounds 1 (asymmetrical push-pull derivative) and 2 (symmetrical push-pull-push derivative) were studied in which one (push-pull) or two aniline units (push-pull-push) are connected to a biphenyl group via triazole linkers, made by "click" chemistry. Steady-state and time-resolved spectroscop…
Urchin-like CdWO4 microspheres with hollow interiors have been successfully synthesized by a facile template free hydrothermal treatment method. The urchin-like CdWO4 hollow spheres are composed of radiatively assembled single-crystalline CdWO4 nanorods with lengths of several hundred nm and widths of 25–80 nm. The sa…
Redox-responsive, hydrophobically associating polymers which can change their structures, conformations and properties through specific redox reaction are interesting, because they can be used to construct novel biosensors and can be applied to environmentally benign electro-functional systems, such as electrically sw…
Gadonanotubes (GNTs), which are powerful new T(1)-weighted MRI contrast agents, were derivatized with serine amino acid substituents to produce water-soluble (2 mg ml(-1)) ser-gadonanotubes (ser-GNs) as magnetic nanoprobes for intracellular labeling. The ser-GNTs were used to efficiently label MCF-7 human breast cance…
We perform monomer-resolved computer simulations of high-generation dendritic molecules, varying the amount of charge and the spacer length between subsequent generations. Charged entities (monomers and counterions) are simulated with the explicit Coulomb interaction, employing the Ewald summation technique. We discov…
An integrated approach of experiment and theoretical computation to acquire enthalpies of formation for ternary compounds is described. The enthalpies of formation (DHf ) for Al71Fe19Si10 and Al31Mn6Ni2 are measured via a calorimeter. Miedema model, CALPHAD and first-principles method are employed to calculate DHf for…
The reaction of PhBCl(2) with free base triarylcorroles results in a spontaneous reduction to give diboron corrole complexes (PhBHBPh)(Cor) in which a proton has been captured to form a bridging B-H-B group encapsulated within the corrole ligand. The proposed mechanism is supported by the reaction of PhBF(2) with H(3)…
Pitch-based carbon fibers are commonly used to produce polymeric carbon fiber structural composites. Several investigations have reported different methods for dispersing and subsequently aligning carbon nanotubes (CNTs) as a filler to reinforce polymer matrix. The significant difficulty in dispersing CNTs suggested t…
The papermaking industry can benefit a lot from nanotechnology. This versatile technology can also be used in the area of fillers for papermaking wet end applications. In such applications the main technological examples currently available include wet end addition of commercially available nanofillers, formation of n…
This paper examines a novel model of an Adaptive Tuneable Dynamic Vibration Absorber (ATDVA), based on the use of Shape Memory Alloy materials (SMA). Being adaptive, the absorber is able to track variation of the structural dynamic response. The absorber architecture is extremely simple: it consists of a clamped SMA w…