Materials Literature
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We use density functional theory calculations with Hubbard corrections (DFT+U) to investigate electronic aspects of the interaction between ceria surfaces and gold atoms. Our results show that Au adatoms at the (111) surface of ceria can adopt Au(0), Au(+) or Au(-) electronic configurations depending on the adsorption…
Mesoporous materials with controlled composition and pore characteristics have been extensively investigated during recent decades. The design, synthesis and assembly of building blocks with suitable shapes, length scales and functionalities have led to advances in the control of pore structure and morphology, the tai…
Herein we demonstrate the photothermally-triggered self-assembly of poly(N-isopropylacrylamide)-functionalized gold nanorods in one-dimensional structures.
Dendrimers are a class of highly branched synthetic polymers that form spherical macromolecules that can be reliably synthesized to a specific physical size in a highly reproducible manner. Dendrimers of different generations are chemically related to each other, allowing the study of molecular size without the interf…
The grafting of pegylated dendrons on 9(2) nm and 39(5) nm iron oxide nanoparticles in water, through a phosphonate group as coupling agent has been successfully achieved and its mechanism investigated, with a view to produce biocompatible magnetic nano-objects for biomedical applications. Grafting has been demonstrat…
The structures of mass-selected gold cluster anions Au(14)(-)-Au(19)(-) have been reinvestigated using an improved low temperature trapped ion electron diffraction experiment. Structures were assigned by comparing experimental with simulated scattering functions using model structures obtained by density functional ca…
The mineralogy of bulk and rhizosphere soils was compared to assess the effect of roots on mineral weathering in a Typic Dystrochrept supporting Norway spruce ( Picea abies [L.] Karst) and oak ( Quercus sessiliflora Smith). In an experimental forest site (Breuil‐Chenue, France), systematic soil sampling was performed…
Biomimetic approaches involving environmentally-friendly synthetic pathways provide an opportunity to elaborate novel high-performance biocomposites. Here we have developed a low-energy biosynthetic system for the production of a high-strength composite material consisting of self-assembled and nanostructured cellulos…
In addition to a well-known capacity of the layer-by-layer (LbL) technique to create multilayers with strongly bound polymer chains, the technique also provides a unique opportunity to fabricate highly swollen, hydrogel-like films and capsules. Layered, ultrathin hydrogel-like membranes can be fabricated using electro…
Chemical activation of CDC leads to capacitance values in an organic electrolyte as high as 180 F/g, 30% larger than those of as-produced samples, due to the surface area and microporosity development occurring as a consequence of the activation.
A simple route for the synthesis of a novel mesoporous zinc oxide material having wurtzite like nanocrystalline pore walls by using Schiff-base amine as template is reported, which shows very high BET surface area (456 m(2) g(-1)) and remarkably enhanced photoconductivity and photoluminescence at room temperature unde…
Inhibitive and adsorption properties of ethanol extract of vernonia amygdalina for the corrosion of mild steel were studied using weight loss, thermometric, gasometric and IR methods of monitoring corrosion. The results revealed that ethanol extract of Vernonia amygdalina inhibited the corrosion of mild steel. The inh…
Although poor mechanical properties are usually found in films cast from waterborne colloidal polymers relative to their solvent cast counterparts, these materials offer the opportunity to control structure and composition very precisely at the nanoscale. Here, we introduce a knowledge-based strategy to design what we…
Acoustic cavitation plays a significant role in many applications that include therapeutic medicine, sonochemsitry and materials processing. The type of cavitation bubbles generated, namely transient or stable (repetitive transient), is important for optimizing the efficiency of these applications. We report on a mult…
Sodium amidoborane (SAB, NaNH2BH3), an ammonia borane (AB, NH3BH3) derivative, was recently reported as a novel solid-state hydrogen storage material. We reinvestigate its thermal decomposition using the best grade commercially available AB (98%) and technical quality (90%) substrates. We characterize evolved gases wi…
In this paper we report synthesis, conductivity and structural data for the novel tetragonal garnet-related system, Li7La3Sn2O12. Neutron diffraction data shows that the tetragonal distortion is related to ordering of Li in three sites within the structure to ensure no short Li-Li interactions. Consistent with the ord…
Single-crystalline KNbO3nanorods were prepared from Nb2O5 by hydrothermal synthesis at 180 °C in a KOH solution using sodium dodecyl sulfate surfactant. The morphology of the KNbO3 product was strongly influenced by the addition of the surfactant, the concentration of the reactants, the reaction time and temperature,…
Novel guar gum-g-poly(sodium acrylate)/rectorite (GG-g-PNaA/REC) superabsorbent nanocomposites were prepared in aqueous solution using guar gum (GG), partially neutralized acrylic acid (NaA), acidified rectorite (H+-REC) and organified rectorite (CTA+-REC) by cetyltrimethylammonium bromide (CTAB) as raw materials, amm…
A low-temperature (60 or 95 °C) “one-pot” procedure for the aqueous precipitation of manganese oxide nanoparticles is developed through the MnO4−/Mn2+ reaction. Characterization of the particles is carried out using elemental analysis, mean oxidation state determination, powder XRD, FESEM, TEM and electron diffraction…
The epoxidation of cyclohexene with aqueous hydrogen peroxide over mesostructured Ti(Cp)2Cl2-grafted silica catalysts is described for the first time. Three kinds of Ti-containing systems with different textural properties have been employed: Ti/SiO2, Ti/MCM-41 and Ti/MCM-48. A minimal local H2O2 concentration in the…