Abstract
Nanotip arrays have been fabricated on the distal faces of coherent fiber-optic bundles. A nanotip array comprised ∼6000 individual optical fibers that were etched chemically. Individual tips were ∼4 μm long with radii of curvatures as small as 15 nm. Nanotip arrays served as a template for a novel polymeric patterning process called photoimprint lithography. This lithographic method generated an array of polysiloxane microwells on glass surfaces. Individual wells had ∼1 μm diameters and were dispersed regularly ∼4 μm apart (center-to-center). Nanotip arrays were also used as templates for an imprint patterning process. This lithographic method generated an array of polystyrene microwells on glass surfaces dispersed regularly ∼4 μm apart with ∼1 μm diameters and ∼4 μm well depths. Both lithographic methodologies provide a simple, technically-expedient method to pattern surfaces with arrays of picoliter-volume wells suitable for microanalytical device utilization.
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