PDMS stamp

[1] Many techniques have been developed to modify the basic setups to perform a range of tasks such as assays on small volumes.

Because of the small dimensions of these devices flow is laminar, not turbulent, which can lead to many useful properties; however, this reduces the ability of fluid streams to mix.

To apply a homogeneous pressure during the printing step, a magnetic force is used.

For that, the stamp is sensitive to a magnetic field by injecting iron powder into a second layer of PDMS.

[3] Fully automated micro contact printing equipment was developed.

Sarfus image of streptavidin deposited by soft lithography with PDMS stamp.