Multiwalled Carbon Nanotube Crossbar Junction Formation via Microcontact Printing

摘要

Here, we present an approach to design, fabricate, and create a simple, low-cost, and rapid prototyping crossbar junction using a p-type and n-type multiwalled carbon nanotubes (MWCNTs) via microcontact printing. This is achieved using poly-dimethylsiloxane (PDMS) molds. The parallel relief structure in order of a few micrometers is used to transfer continuous horizontal arrays of these MWCNTs in aqueous suspension. Using an alignment and the stamping process, PDMS molds are inked alternatively with p-type and n-type MWCNTs suspensions and transferred in a grid-like manner onto the base microelectrode platform. Parallel alignment of these MWCNTs is achieved due tq, the geometry of the mold relief structures. The hierarchical assembly results in the formation of the crossbar array structures. The functionality of this circuit has been demonstrated through the current - voltage (I-V) characteristics associated with the junction formation.