Abstract: A method is provided for fabricating microelectrodes and microelectrode arrays by etching in an acid solution. Glass wafers are diced into a desired shape to form narrow probes, which are immersed in the acid solution. An organic layer on top of the acid solution forms a meniscus at the point of contact with the probes, and the taper angle on the etched probes will depend on this meniscus angle. After etching, the tapered probes are coated with a conductive layer, followed by an insulating layer over most of their length so as to leave a small conductive area exposed at the tip. The glass wafer containing the probes is then mounted on a printed circuit board carrier.

Abstract: A method is provided for fabricating microelectrodes and microelectrode arrays by etching in an acid solution. Glass wafers are diced into a desired shape to form narrow probes, which are immersed in the acid solution. An organic layer on top of the acid solution forms a meniscus at the point of contact with the probes, and the taper angle on the etched probes will depend on this meniscus angle. After etching, the tapered probes are coated with a conductive layer, followed by an insulating layer over most of their length so as to leave a small conductive area exposed at the tip. The glass wafer containing the probes is then mounted on a printed circuit board carrier.

Abstract: A system for concentrating gas, using the concentrated gas to pump liquid, and recycling the gas and liquid is disclosed. The system comprises a body of liquid, a down pipe in fluid communication with the body of liquid, a gas injection apparatus for introducing gas into the liquid that passes through the down pipe, a separator for separating compressed gas from the liquid, and a gas-liquid recycle loop. The down pipe and the gas injection apparatus are structured and arranged to compress the gas. The gas-liquid recycle loop comprises a compressed gas storage vessel containing the separated gas, a reservoir containing liquid separated from the compressed gas, and a gas-liquid pump. The gas-liquid pump has a gas inlet in communication with the gas storage vessel, and a fluid inlet in communication with the reservoir. The gas-liquid pump is structured and arranged for pumping the liquid back to the body of liquid and delivering the gas to the gas injection apparatus.

Abstract: A breathable water-resistant fabric in which a surface of a fabric material is coated with a microporous layer of ETFE, and a process for making same. An ETFE dope containing a blend of ETFE and a binder polymer is cast or extruded into a film which is subsequently bonded or laminated to the fabric material. The binder is extracted to produce a microporous ETFE layer.