Speaker: Prof. Sung Hun Jin
Assistant Professor, Dept. of Electronic Engg.
Incheon National University

Date/Time: February 21, 2018 (Wednesday) / 3.00 p.m.

Venue: Seminar Room (First Floor), MEMS Dept.

Abstract: For nearly five decades, scientists and engineers have managed to drive revolutionary technology by shrinking silicon transistors, the building blocks for all computing. Now transistors are approaching fundamental roadblocks that mean the devices cannot still be fashioned from silicon if they are to become any smaller. Researchers are therefore looking for materials to replace silicon. Among many candidates, one of the most promising options is single wall carbon nanotube (SWNT) based transistors because their ability to operate at low voltages (saving chip power) and their exceptional performance in devices in which the length of the current-carrying CNT channel is less than 10 nanometers. However, the road to producing transistors from single-walled carbon nanotubes (SWNTs) has been hedged about the difficulties of purifying and controllably positioning these tiny molecular cylinders, which have a diameter of about 1 nanometer. Here we report one of the most fascinating methods for obtaining arrays of highly purified semiconducting CNTs with its process scalability and compatibility with the state of the art Si technology. Nanoscale thermocapillary flows in thin-film organic coatings followed by reactive ion etching serve as highly efficient means for selectively removing metallic carbon nanotubes from electronically heterogeneous aligned arrays grown on quartz substrates.