Materials Literature
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Soot aerosols are ubiquitous in the atmosphere and play an important role in global and regional radiative balance and climate. Their environmental impact, however, greatly depends on their structure, composition, particle size, and morphology. In this study, the structural changes of a model soot (Printex U) during a…
A series of pyridyl-appended bis(urea) ligands form supramolecular gels in the presence of metal ions (metallogels), particularly copper(II) and silver(I). The gels have been characterised by rheometry and SEM, and the effect of the metal ions on gel strength and morphology examined. The metal-induced gelation is link…
This tutorial review summarizes the recent advances on the self assembly of magnetic nanoparticles into one-, two-, and three-dimensional architectures using synthetic polymers and biopolymers. The materials have unique stimuli-responsive behavior that emerge in response to internal and external magnetic fields. For e…
Polymer stabilised liquid crystals describe systems in which a polymer network is formed within an anisotropic liquid crystal matrix. During the polymerisation process a bi-continuous system is formed, where a continuous polymer network permeates a continuous liquid crystal phase. The order and structure of the liquid…
We compare the structural and mechanical properties of static packings composed of frictionless convex (ellipses) and concave (rigid dimers) particles in two dimensions. We employ numerical simulations to generate static packings and measure the shear stress in response to applied simple shear strain as a function of…
Proton transport properties across the grain boundary of barium zirconate based proton conductors were studied in accordance with the space charge concept. The analysis is performed at temperatures lower than 200 °C using a Mott-Schottky model. The barrier height of Y- and Gd-doped barium zirconate is in the range of…
It is becoming increasingly evident that to exploit nanocrystals in light-harvesting applications requires a high-level understanding of the interactions that link exciton states with surface states and the surrounding environment. Recent research has established time-resolved photoluminescence as a quantitative tool…
Uniform carbon spheres with hollow core and porous shell structures were controllably fabricated through carbonizing fine core/shell particles of polystyrene/cross-linked poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol), obtained by a simple template approach.
A novel tetraamino silicon(iv) phthalocyanine has been prepared, of which the fluorescence emission and reactive oxygen species generation efficiency are greatly enhanced at lower pH in the range of ca. 5-7, making it a promising pH-controlled and tumour-selective fluorescence probe and photosensitiser for photodynami…
Abstract Bacteria have contributed to the formation of minerals since the advent of life on Earth. Bacterial biomineralization plays a critical role on biogeochemical cycles and has important technological and environmental applications. Despite the numerous efforts to better understand how bacteria induce/mediate or…
Tissue engineering strategies have been showing promising early results in articular cartilage lesions repair. Hydrogels based on natural origin polymers as chitosan glycerol-phosphate (CGP) thermo-sensitive formulation that can be implanted in a minimal invasive manner, represent a great promise as injectable scaffol…
X-Ray absorption spectroscopy (XAFS) is an attractive in situ and in operando technique. In recent years, the more conventional extended X-ray absorption fine structure (EXAFS) data analysis technique has been complemented by two newer analysis methods: the 'atomic' XAFS (AXAFS) technique, which analyzes the scatterin…
The reactivity of NO(2) on irradiated TiO(2)/SiO(2) films was studied, with different TiO(2) contents, as proxies for NO(x) de-polluting materials. The influence of the photocatalyst concentration, the role of molecular oxygen and the effect of nitrate on the reactivity of TiO(2) films were investigated. NO, HONO and…
Traditional aqueous self-assembly of tubular structures (as well as other aggregates) usually relies on the hydrophobic effect, a relatively weak and nondirectional interaction. The resultant aggregates are inherently soft, fluid, and less-ordered. Alternatively, we report a novel kind of nonamphiphilic self-assembly…
Interlocked cubelike Mn 3 O 4 thin films have been prepared by a simple and low temperature chemical bath deposition method. These interlocked cubelike Mn 3 O 4 thin films are further converted into nanoflakes of birnessite MnO 2 using voltammetric cycling in aqueous Na 2 SO 4 electrolyte. The process is dynamic poten…
Water-soluble ≤6 nm tantalum oxide nanoparticles have been synthesized and characterized in solution using HPLC-ICP, DLS, and multinuclear NMR. Nanoparticle formulation permitted intravenous injection, in vivo imaging, and subsequent renal clearance. A clinical CT scanner provided excellent resolution following agent…
Cobalt oxide nanostructures are deposited by Chemical Vapor Deposition (CVD) on Si(100) substrates at temperatures between 300 and 550 °C, using for the first time a novel Co(II) adduct as molecular precursor [Co(hfa)2·TMEDA; hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate, TMEDA = N,N,N′,N′-tetramethylethylenediamine…
A covalent triazine-based framework (CTF) was synthesized by using a novel microwave (MW)-enhanced high-temperature ionothermal polymerization method. Amorphous CTF samples with high surface areas (up to 2390 m2 g−1) and high hydrogen adsorption capacities (up to 1.78 wt% at 1 bar and 77 K) could be easily obtained in…
Nanosize homogenous rod-like tungsten bronze CsxWO3 with excellent NIR shielding ability was successfully synthesized by a novel and facile water controlled-release solvothermal process (WCRSP).
We have demonstrated the first surfactant-free synthesis of fluorescent Pt nanoclusters in N,N-dimethylformamide (DMF) solution. The Pt nanoclusters consist of 4 to 6 Pt atoms. They form highly stable dispersions in water, under both acidic (pH 2) and basic conditions (pH 12), and at ionic strengths of 1 M NaCl.