Materials Literature
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Polyhedral oligomeric silsesquioxane (POSS) nanocomposite, which is prepared from two liquid monomers and can be processed under the “spinning on” process, exhibits an ultra-low dielectric constant (k) of 1.47. The ultra-low k value of the POSS nanocomposite material is attributed to the formation of a POSS lamellar s…
The stability and phase transformations of the four BiB3O6 polymorphs, i.e., α-, β-, γ- and δ-BiB3O6, were investigated under different temperatures and pressures. β-BiB3O6 is a metastable phase which can only be obtained by boric acid flux method in a sealed system at low temperature. The other polymorphs, α-, γ- and…
Carbon nanotubes are characterized by slow wave propagation and high characteristic impedance due to the additional kinetic inductive effect.This slow wave property can be used to introduce resonant dipole antennas with dimensions much smaller than traditional half-wavelength dipole in Terahertz band.However, this pro…
High valence states in manganese clusters are a key feature of the function of one of the most important catalysts found in nature, the water-oxidizing complex of photosystem II. We describe a detailed electrochemical investigation of two bio-inspired manganese-oxo complexes, [Mn(4)O(4)L(6)] (L = diphenylphosphinate (…
Processing in a magnetic field leads to the texturing of materials along an easy-magnetization axis when a minimum anisotropy energy exists at the processing temperature; the magnetic field can be applied to a particle assembly embedded into a liquid, or to a solid at a high diffusion temperature close to the melting…
An efficient, solvent-free, catalyst-free approach is reported for the synthesis of strong, paramagnetic, conducting carbon microspheres from used polyethylene terephthalate (PET). The thermal decomposition of used PET polymer at 700 °C for 3 h in a closed reactor under autogenic [self generating] pressure yielded exc…
Six N-substituted NTB ligands (NTB = (tris(benzimidazol-2-ylmethyl)amine), namely, triMeNTB (L1), triEtNTB (L2), triPrNTB (L3), triBuNTB (L4), triAlNTB (L5) and triBzNTB (L6), have been synthesized through replacing the H atoms on the NH groups by methyl, ethyl, (n)propyl, (n)butyl, allyl, and benzyl groups, respectiv…
A carnosine based amphiphilic hydrogelator has been developed which efficiently gelates water and exhibits salt, pH and thermoresponsive gelation properties.
The formation of a self-assembly between water soluble gold nanoparticles AuNP-1.Eu, functionalised with a heptadentate macrocyclic Eu(III) cyclen conjugate via an alkyl thiol spacer, and a naphthalene β-diketone antenna was investigated as a function of pH in water. In the study, the changes in the absorption spectra…
Two 3d-4f heterometallic compounds of p-tert-butylsulfinylcalix[4]arene were synthesized by the solvothermal method and characterized by some hinged double-dumbbell-like subunits in which two perpendicular dumbbell entities were constructed by an in-between isosceles triangle Mn(II)Ln(III)(2), and two tail-to-tail cal…
Five new lanthanide 1-D coordination polymers are reported which are formed from flexible salen type Schiff-base ligands H(2)L and H(2)L' (H(2)L = N,N(1)-ethylene bis(salicylideneimine); H(2)L' = N,N(1)-bis(3-methoxysalicylidene)ethylene-1,2-diamine). The polymeric structures are formed by bridging neutral H(2)L units…
Drug, gene, and protein delivery is a very challenging and exciting area in nanobiotechnology where block copolymers are increasingly considered especially as carriers for pharmacotherapy of various cancers. Cancer chemotherapy is particularly challenging because of nonselective distribution of drugs, associated sever…
The paper presents the results of a complex study of the structure, phase composition and physical and mechanical properties of a new biocomposite material, bulk nanostructured titanium–calcium-phosphate coating, as well as its biological testing. The high-strength nanostructured titanium was obtained by multiple unia…
Four novel π-conjugated chromophores with an azobenzene core (1–4) have been synthesized exploiting Pd-catalysed cross-coupling reactions between ethynyl-bearing azobenzene cores and suitably-designed peripheral groups. While in molecules 2 and 3 the azobenzene core is equipped, respectively, with ethynyl and 1,3-buta…
Two useful criteria are employed for comparing the super-hydrophobicity of surface designs from a wetting point of view. The first is the apparent contact angle at the transition point between the homogeneous (Wenzel) wetting regime and the heterogeneous (Cassie–Baxter) wetting regime. The second criterion is the wett…
A preliminary biochemical approach to the study of collagen isolated from the medusa Catostylus tagi is reported and results are discussed in view of its use as a natural matrix for biomedical applications. Collagen from the jellyfish umbrella was isolated by pepsin digestion and purified by dialysis and salt precipit…
Two series of solid solutions based on the [Fe(bpp)2][BF4]2 (bpp = 2,6-di(pyrazol-1-yl)pyridine) spin-crossover lattice are described. Materials of formula [FeyNi1−y(bpp)2][BF4]2 (0.95 ≥ x ≥ 0.15) are all phase-pure. In contrast, [Fe(bpp)2]x[Ru(terpy)2]1−x[BF4]2 (0.95 ≥ x ≥ 0.28) crystallise as a mixture of the neat […
A combined experimental and theoretical investigation has clarified the nanometre-scale vapour-phase epitaxial growth of ZnO nanostructures on different crystal planes of GaN substrates. Under typical growth conditions, ZnO nanorods grow perpendicular to the GaN(0001) plane, but thin flat films form on GaN(101), (100)…
New D2d octupolar organic chromophores based on bipyrimidine as a strong acceptor group exhibit strong fluorescence, fluorosolvatochromism and large second-order nonlinear optical responses.
A chemical sensor for mercury(II) (Hg(II)) was developed based on the quenching of the fluorescence of cadmium sulfide (CdS) quantum dots (QDs) coated with polypropylenimine tetrahexacontaamine dendrimer (DAB) generation 5, CdS-DAB nanocomposites. The synthesis and characterization of CdS-DAB nanocomposites by means o…