Research Projects

Monolayer Resist for Patterned Contact Printing of Aligned Nanowire Arrays

Ali Javey, Toshitake Takahashi, Kuniharu Takei, Johnny Ho, Yu-Lun Chueh and Zhiyong Fan

Berkeley Sensor and Actuator Center

Large-area, patterned printing of nanowires by using fluorinated self-assembled monolayers as the resist layer is demonstrated. By projecting a light pattern on the surface of the monolayer resist in an oxygen-rich environment, sticky and nonsticky regions on the surface are directly defined in a single-step process which then enables the highly specific and patterned transfer of the nanowires by the contact printing process, without the need for a subsequent lift-off step. This work demonstrates a simple route toward scalable, patterned printing of nanowires on substrates by utilizing light-tunable, nanoscale chemical interactions and demonstrates the versatility of molecular monolayers for use as a resist layer.

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J. Am. Chem. Soc., 2009, 131 (6), pp 2102–2103