Scanning probe lithography (SPL) offers an accessible alternative to conventional photolithography for surface nanofabrication. In principle, the synthetic scope of SPL could be greatly enhanced by combining the precision of scanning probe systems with the chemical synthetic scope offered by enzymatic catalysis. Here we report the development of multiplexed SPL employing probes functionalized with horseradish peroxidase, and its subsequent use for the constructive fabrication of polyaniline features on both silicon oxide and gold substrates. This polymer is of particular interest due to its potential applications in organic electronics but its use is hindered by its poor processability, which could be circumvented by direct <i>in situ </i>synthesis at the desired locations. Using parallelized arrays of probes, the fabrication of polymer features over 1 cm<sup>2</sup> areas was demonstrated with individual feature widths as small as 162 ± 24 nm. The identity of the deposited materials was confirmed by Raman spectroscopy, and it was further shown that these polyaniline features could be chemically derivatized postlithographically by Huisgen [2 + 3] “click” chemistry, when 2-propargyloxyaniline was used as the monomer in the initial lithography step.

Biocatalytic parallelized scanning probe lithography for the additive fabrication of conjugated polymer structures

2019 Fall National Meeting

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