Materials Literature
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The degradation of Ni/yttria-stabilized zirconia ͑YSZ͒-based solid oxide electrolysis cells operated at high current densities was studied.The degradation was examined at 850°C, at current densities of Ϫ1.0, Ϫ1.5, and -2.0 A/cm 2 , with a 50:50 ͑H 2 O:H 2 ͒ gas supplied to the Ni/YSZ hydrogen electrode and oxygen supp…
A novel and facile technique for the rapid synthesis of few layered graphene sheets via hydrogen induced reduction–exfoliation of graphite oxide at a low temperature of ∼200 °C is reported.
Aerogels were prepared through the self-assembly of cellulose nanowhiskers in a benign manner. Preparation of these aerogels only requires sonication in water to form a hydrogel, solvent exchange with ethanol and supercritical CO2 drying. Aerogels were prepared with varying cellulose nanowhisker content and characteri…
One-dimensional (1D) semiconductor nanostructures are of prime interest due to their potential in investigating the size and dimensionality dependence of the materials' physical properties and constructing nanoscale electronic and optoelectronic devices. Cadmium sulfide (CdS) is an important semiconductor compound of…
Since ancient times, people have taken advantage of the antimicrobial effects of colloidal silver particles. Aside from the medical prospects, silver nanoparticles are found in a wide range of commercially available consumer products ranging from cosmetics to household cleansers. Current synthetic methods for creating…
In this paper, we explore the possibility of using ultrasmall near-infrared (NIR) gold nanoclusters (AuNCs) as novel contrast imaging agents for tumor fluorescence imaging in vivo. The fluorescence imaging signal of the tail vein administrated AuNCs in living organisms can spectrally be well distinguished from the bac…
A bright blue fluorescent graphene oxide that originates from passivation of surface reactive sites by amide formation and ring-opening amination of epoxide has been prepared. The surface polarity and charges of the fluorescent graphene oxide can synchronously be tuned by varying the used alkylamines.
Silica-based ordered mesoporous materials have experienced impressive consideration in drug delivery applications since they were first employed as drug delivery systems back in 2001. The possibility of tuning the physicochemical properties of the matrices together with the development of stimuli-responsive technologi…
Fluorescent DNA-Ag NCs are demonstrated as novel, label-free, and turn-on fluorescence probes for Cu(2+) ions sensors. We also used this novel fluorescent probe to determine Cu(2+) ions in Montana soil (SRM 2710) and pond water.
An analysis of the dependence of electric potential on the state of stress of a lithiated-silicon electrode is presented. Based on the Larché and Cahn chemical potential for a solid solution, a thermodynamic argument is made for the existence of the stress-potential coupling in lithiated silicon; based on the known pr…
It is still a challenge to prepare graphene from graphene oxide (GO) under a mild thermal reduction. Here we report that GO can even be reduced at a low temperature (below 150 degrees C) at atmospheric pressure in a mixture of N,N-dimethylacetamide (DMAc) and water (10 : 3, v/v) under the protection of nitrogen gas. F…
In this work, we report a facile approach for the shape-controlled synthesis of cobalt carbonate/hydroxide intermediates. Three different structures, viz., one-dimensional (1D) needle-like nanorods, two-dimensional (2D) leaf-like nanosheets, and three-dimensional (3D) oval-shaped microparticles, have been synthesized…
Turning "stone" into "gold": pyrene, a faint fluorophore in the solid state, is transformed into a bright emitter by decorating it with tetraphenylethene units; the new luminogen is thermally and morphologically stable and its light-emitting diode shows excellent performance, with external quantum efficiency and curre…
Bioconjugated nanomaterials offer endless opportunities to advance both nanobiotechnology and biomedical technology. In this regard, semiconductor nanoparticles, also called quantum dots, are of particular interest for multimodal, multifunctional and multiplexed imaging of biomolecules, cells, tissues and animals. The…
The synthesis of quantum dot semiconductors is now an established science and a large amount of work has been carried out into the chemistry and physics of the interface between nanoparticle surface and ligand. Here, we review the basic ligands and cover some of their properties.
Scientists and bioengineers have dreamed of designing materials from the bottom up with the finest detail and ultimate control at the single molecular level. The discovery of a class of self-assembling peptides that spontaneously undergo self-organization into well-ordered structures opened a new avenue for molecular…
The effect of Ag doping on the electronic structure of a stable thiolate-protected Au(25) cluster (Au(25)(SR)(18)) was studied by measuring the optical spectra of Au(25-n)Ag(n)(SC(12)H(25))(18) (n = 0-11) and the results reveal that the electronic structure of Au(25)(SC(12)H(25))(18) is sensitive to Ag doping and is c…
Nitrogen-containing functional groups were generated on the surface of partially oxidized multi-walled carbon nanotubes (CNTs) via post-treatment in ammonia. The treatment temperature was varied in order to tune the amount and type of nitrogen- and oxygen-containing functional groups, which were studied using high-res…
Supramolecular chemistry has primarily found its inspiration in biological molecules, such as proteins and lipids, and their interactions. Currently the supramolecular assembly of designed compounds can be controlled to great extent. This provides the opportunity to combine these synthetic supramolecular elements with…
Economic pressure, environmental issues and ever increasing demand are driving the shift from oil-based polymers to those available from renewable resources. Ring opening polymerisation of cyclic esters is currently a topical field with metal complex-induced coordination/insertion type polymerisation leading the way.…