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Electrodes with electrochemical dimensions as small as 1 angstroms have been fabricated and used for electrochemical studies. These nanometer-scale electrodes have enabled the measurement of electron-transfer rate constants, [k.sub.het], that [...]

Hydrogen sensors and hydrogen-activated switches were fabricated from arrays of mesoscopic palladium wires. These palladium 'mesowire' arrays were prepared by electrodeposition onto graphite surfaces and were transferred onto a cyanoacrylate film. Exposure to hydrogen gas caused a rapid (less than 75 milliseconds) reversible decrease in the resistance of the array that correlated with the hydrogen concentration over a range from 2 to 10%. The sensor response appears to involve the dosing of nanoscopic gaps or 'break junctions' in wires caused by the dilation of palladium grains undergoing hydrogen absorption. Wire arrays in which all wires possessed nanoscopic gaps reverted to open circuits in the absence of hydrogen gas., Chemical sensors based on nanowires usually operate through a change in resistance induced by the surface adsorption of analyte molecules. Tao and co-workers (1) have demonstrated that the conductivity of [...]

Metallic molybdenum (Mo °) wires with diameters ranging from 15 nanometers to 1.0 micrometers and lengths of up to 500 micrometers (0.5 millimeters) were prepared in a two-step procedure. Molybdenum oxide wires were electro-deposited selectively at step edges and then reduced in hydrogen gas at 500 ° C to yield Mo °. The hemicylindrical wires prepared by this technique were self-uniform, and the wires prepared in a particular electrodeposition (in batches of [10.sup.5] to [10.sup.7]) were narrowly distributed in diameter. Wires were obtained size selectively because the mean wire diameter was directly proportional to the square root of the electrolysis time. The metal nanowires could be embedded in a polystyrene film and lifted off the graphite electrode surface. The conductivity and mechanical resiliency of individual embedded wires were similar to those of bulk molybdenum., One motivation for synthesizing nanowires is their potential use as interconnects in future generations of nanometer-scale electronics. There are few methods for preparing nanowires that are long, uniform in diameter, [...]

Analysis of the Published Calorimetric Evidence for Electrochemical Fusion of Deuterium in Palladium THE PRIMARY OBSERVATION SUGGESTED as evidence for the cold fusion of deuterium (D) in palladium (Pd) is [...]