Dip Pen Nanolithography

Dip Pen Nanolithography (DPN) is a soft-lithography technique that uses an AFM scanning probe tip to draw nanostructures. In the DPN process, a probe tip is coated with liquid ink, which then flows onto the surface to make patterns wherever the tip makes contact. This direct-write technique offers high-resolution patterning capabilities for a number of molecular and biomolecular "inks" on a variety of substrates. Substrates are the base material that the images are printed on.

Some of the applications of the DPN technique include sol gel templates that are used to prepare nanotubes and nanowires, and protein nanoarrays to detect the amount of proteins in biological samples such as blood.

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