Materials Literature
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Lewis acid−base interactions between anions and iodine-containing neutral molecules have been utilized in order to accomplish multicomponent molecular conductors with supramolecular assemblies. In the presence of diiodoacetylene (DIA), p -bis(iodoethynyl)benzene ( p BIB), and/or tetraiodoethylene (TIE), several cation…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTBiologically Derived Conducting and Water Soluble PolyanilineLynne A. Samuelson, Althea Anagnostopoulos, K. Shridhara Alva, Jayant Kumar, and Sukant K. TripathyView Author Information Science and Technology Directorate, U.S. Army Na…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRational Design of Benzyl-Type Protecting Groups Allows Sequential Deprotection of Hydroxyl Groups by Catalytic HydrogenolysisMatthew J. Gaunt, Jinquan Yu, and Jonathan B. SpencerView Author Information University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW…
A method for the fabrication of luminescent Si nanoclusters in an amorphous SiO2 matrix by ion implantation is reported. We have measured the dose (concentration of excess Si atoms) and annealing time dependence of the photoluminescence of Si nanoclusters in SiO2 layers at room temperature. The samples were fabricated…
Quantum dots are man-made “droplets” of charge that can contain anything from a single electron to a collection of several thousand. Their typical dimensions range from nanometres to a few microns, and their size, shape and interactions can be precisely controlled through the use of advanced nanofabrication technology.
Macroporous materials with highly uniform pores in the range 50 nm to 20 μm and of any desired porosity up to 90% can be produced using the method introduced here—emulsion templating. The Figure shows an extremely porous poly(acrylamide) gel, one of the many types of materials that can be synthesized using this versat…
The application of carbon nanotubes in biology is promising owing to their many unique and favorable properties, from high tensile strength and high electrical conductivity to the ability to be wet by water. The use of nanotubes for the immobilization and visualization of DNA and proteins is illustrated. For example,…
The durability of two water-repellents for granitic stonework was determined. Weathered and sound samples of granites widely used in building construction and restoration in Galicia (NW Spain) were treated with water repellents of known efficacy, and then subjected to two artificial weathering tests: prolonged exposur…
The reaction of portland cement mortars with SO2 gaseous pollutant and artificial 'acid rain' solution has been examined using laboratory exposure chambers, with realistic presentation rates of pollutants. The mortar were previously carbonated to produce superficial carbonation. Two mortars with different w/c ratio an…
A review of some relevant papers about the cutting of ornamental stones with diamond tools is presented here with the aim of being useful to the Natural Stone industries. Due to the length of this paper, it has been divided in two parts: in the first one, the influence of the factors of the cutting equipments (machine…