Abstract: In one aspect, the disclosure relates to a support material for 3D printing of soft materials having feature sizes <5 ?m that persist over time, methods of 3D printing using the same, and articles that include soft matter constructed using the disclosed methods. In one aspect, the support materials can be jammed inverse emulsions having silicone oils as the continuous phase and glycerol/water mixtures as the dispersed phase. In some aspects, the support materials also include a surfactant. In any of these aspects, the support materials can be optically clear.

Abstract: Perfusion systems compatible with 12- and 96-well plates well plates are provided. The system includes a chamber insert and a reservoir lid that couple together to fit the well plate. Each well receives an insert with compartments for media supply compartment and media collection to service media in the well. The reservoir lid includes a media supply well and a media collection port. When the system is assembled, the media supply well is in fluid communication with the media supply compartment and the media collection port is in fluid communication with the media collection compartment.

Abstract: In one aspect, the disclosure relates to a support material for 3D printing of soft materials having feature sizes <5 µm that persist over time, methods of 3D printing using the same, and articles that include soft matter constructed using the disclosed methods. In one aspect, the support materials can be jammed inverse emulsions having silicone oils as the continuous phase and glycerol/water mixtures as the dispersed phase. In some aspects, the support materials also include a surfactant. In any of these aspects, the support materials can be optically clear.

Abstract: A device comprises a surface that is a hydrogel having a targeted mesh size that permits a low-speed friction coefficient near or lower that that typically reported for cartilage of 0.01 to 0.02, a transition. The device can be a contact lens to sit on the cornea where, during a blink, eyelid slides past the eye surface at about 100 mm s?1. The hydrodynamic lubrication of the hydrogel of the device separates the contact lens surface from the surfaces of the tarsal conjunctiva and marginal conjunctiva of the eyelid. Other devices that can comprise the hydrogel of a targeted mesh size are those that can contact cartilage of articulating joints.

Abstract: A hydrogel fishing bait has a fish attractive scent infused into a water swollen hydrogel. The hydrogel can be a copolymer of at least one water miscible monomer and a cross-linking monomer. The hydrogel can be a terpolymer of hydroxyethyl methacrylate (HEMA), acrylamide, and a crosslinking monomer. The hydrogel terpolymer can be prepared in the shape of a fish or other fish attracting shape. The scent can be an amino acid, protein, fatty acid, sugar, or any combination thereof, and can be from a natural or artificial source. The hydrogel can be filled with a fiber, mesh, or matrix material. The hydrogel can be an interpenetrating polymer network. The hydrogel can be biodegradable. The hydrogel baits when fully hydrated on their surface do not stick to each other.

Abstract: A device comprises a surface that is a hydrogel having a targeted mesh size that permits a low-speed friction coefficient near or lower that that typically reported for cartilage of 0.01 to 0.02, a transition. The device can be a contact lens to sit on the cornea where, during a blink, eyelid slides past the eye surface at about 100 mm s?1. The hydrodynamic lubrication of the hydrogel of the device separates the contact lens surface from the surfaces of the tarsal conjunctiva and marginal conjunctiva of the eyelid. Other devices that can comprise the hydrogel of a targeted mesh size are those that can contact cartilage of articulating joints.

Abstract: A hydrogel fishing bait has a fish attractive scent infused into a water swollen hydrogel. The hydrogel can be a copolymer of at least one water miscible monomer and a cross-linking monomer. The hydrogel can be a terpolymer of hydroxyethyl methacrylate (HEMA), acrylamide, and a crosslinking monomer. The hydrogel terpolymer can be prepared in the shape of a fish or other fish attracting shape. The scent can be an amino acid, protein, fatty acid, sugar, or any combination thereof, and can be from a natural or artificial source. The hydrogel can be filled with a fiber, mesh, or matrix material. The hydrogel can be an interpenetrating polymer network. The hydrogel can be biodegradable. The hydrogel baits when fully hydrated on their surface do not stick to each other.