Nanowerk features dip-pen nanolithography for fabricating graphene devices







(Nanowerk Spotlight) Dip-Pen Nanolithography (DPN) is a scanning probe lithography technique in which the tip of an atomic force microscope (AFM) is used to deliver molecules to a surface, allowing nanostructured surface patterning on scales of under 100 nm. DPN is the nanotechnology analog of the dip pen where the AFM tip acts as a 'pen', which is then dipped into a molecular 'ink' (i.e. coated with a chemical compound or mixture), and then used to write functional nanoscale patterns by putting it in contact with a substrate, the 'paper'. This direct-write technique offers high-resolution patterning capabilities for a number of molecular and biomolecular 'inks' on a variety of substrates, such as metals, semiconductors, and monolayer functionalized surfaces. It's becoming a work-horse tool for the scientist interested in fabricating and studying soft- and hard-matter on the sub-100nm length scale.

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