Abstract: A diagnostic device is provided that includes a plurality of retainment regions interconnected through at least one fluid processing passageway or separated by at least one barrier. A fluid flow modulator can be provided in the fluid processing passageway if a fluid processing passageway is provided. The barrier and/or fluid flow modulator can comprise a polysaccharide, a derivative of a polysaccharide, or a combination thereof. For example, the barrier can comprise a chitosan material.

Abstract: A fluid processing device is provided that includes a substrate, a plurality of fluid retainment regions formed in or on the substrate, and a barrier at least partially separating two or more of the fluid retainment regions. The barrier includes a mixture of a sequestering material and a reaction component. The reaction component can be at least one of a reactant, a reagent, a catalyst, an initiator, a promoter, a cofactor, an enzyme, a salt, or a combination thereof. The sequestering material can be a porous material, a dissolvable material, or both.

Abstract: Inkwells adapted for use in direct-write nanolithography and other applications including use of wells, channels, and posts. The wells can possess a geometry which matches the geometry of tips which are dipped into the inkwells. The channels can be open or closed. Hydrophilicity and hydrophobicity can be used to control ink flow. SEM can be used to characterize the inkwells. Ink flow can be monitored with video. Hydrophobic material layers can be used to prevent cross contamination. Microsyringes can be used to fill reservoirs. Satellite reservoirs can be used to prevent bubble formation.

Abstract: A fluid processing device and method of using the device are provided. The fluid processing device can include a substrate with a fluid processing pathway at least partially formed in or on the substrate. The fluid processing pathway can include an input end, at least one output end, a first input opening, a plurality of reaction sites each in fluid communication with the first input opening and arranged between the first input opening and the at least one output end. The fluid processing pathway can include a plurality of second input openings including two or more in fluid communication respectively with each of the reaction sites, the second input openings being arranged with the reaction site disposed between the at least one output end and the second input openings. The fluid processing device can include one or more output openings in fluid communication with one or more of the plurality of reaction sites and arranged at the at least one output end of the fluid processing pathway.

Abstract: Inkwells adapted for use in direct-write nanolithography and other applications including use of wells, channels, and posts. The wells can possess a geometry which matches the geometry of tips which are dipped into the inkwells. The channels can be open or closed. Hydrophilicity and hydrophobicity can be used to control ink flow. SEM can be used to characterize the inkwells. Ink flow can be monitored with video. Hydrophobic material layers can be used to prevent cross contamination. Microsyringes can be used to fill reservoirs. Satellite reservoirs can be used to prevent bubble formation.