Abstract: The present invention provides a method and apparatus for dispensing a small volume of a selected liquid, such as a biological sample or reagent, onto a substrate. The device includes a tube adapted to contain the liquid. An elongate fiber is disposed within the tube for axial movement therein between raised and lowered positions. Upon shifting or oscillating the fiber between its raised and lowered positions, a liquid spot can be formed at a selected position on the substrate. The device is readily adaptable for the production of micro-arrays having a great number of individual spots.

Abstract: The present invention provides a method and apparatus for dispensing a small volume of a selected liquid, such as a biological sample or reagent, onto a substrate. The device includes a tube adapted to contain the liquid. An elongate fiber is disposed within the tube for axial movement therein between raised and lowered positions. Upon shifting or oscillating the fiber between its raised and lowered positions, a liquid spot can be formed at a selected position on the substrate. The device is readily adaptable for the production of micro-arrays having a great number of individual spots.

Abstract: The present invention provides a method and apparatus for dispensing a small volume of a selected liquid, such as a biological sample or reagent, onto a substrate. The device includes a tube adapted to contain the liquid. An elongate fiber is disposed within the tube for axial movement therein between raised and lowered positions. Upon shifting or oscillating the fiber between its raised and lowered positions, a liquid spot can be formed at a selected position on the substrate. The device is readily adaptable for the production of micro-arrays having a great number of individual spots.

Abstract: An electrophoretic display is provided which includes first and second plates spaced apart to define a volume of space therebetween. The display also includes a first electrode positioned on the first plate, a second electrode positioned on the second plate, and an emulsion positioned within the space. The emulsion includes a non-polar phase forming a continuous phase of the emulsion and a polar phase forming a non-continuous phase of the emulsion.The polar phase of the emulsion is capable of forming droplets (reverse micelles or reverse emulsions) in the non-polar phase. The polar phase includes a dye which is insoluble in the non-polar phase, a polar solvent, and a detergent. Images are provided by the display by controlling the distribution of the polar phase droplets containing the dye in the non-polar liquid phase using an electric field formed between the first and second electrodes.A method is also provided for forming an image by electrophoretic phase separation of an emulsion.