Title: Single-Walled Carbon Nanotubes (SWNTs): History and Future Prospects for Electronic Applications
Venue: Room 806, T5 building, VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi
Time: 4h pm, Friday, 20th April 2018
Speaker: Prof. Sung Hun Jin
Affiliation: Department of Electronic Engineering, Incheon National University, Incheon, South Korea
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. The low temperatures and unusual physics associated with this process enable robust, scalable operation, with clear potential for practical use. We carry out detailed experimental and theoretical studies to reveal all of the essential attributes of the underlying thermo physical phenomena. In this talk, from the perspective of electrical engineering, the recent amazing progress particularly since 2012 on carbon nanotube electronics toward mass production and its future will be also introduced and discussed with a concise manner. In addition, recent progress in the fields of transient electronics based on SWNT and a-IGZO FETs for hardware-secure systems or clandestine electronic devices for military applications as well as many environmentally friendly sensors with minimized waste streams are also introduced. Finally, the latest activities in the field of transparent conducting film (TCF) are summarized and their opportunity by means of SWNTs films for the applications of flexible electronics will be also discussed casually.
Biography:
Sung Hun Jin obtained the M.S. and Ph. D degrees in electrical engineering from Seoul National University (SNU), Seoul, Korea, in 2000 and 2006, respectively. During that time, he researched on micro display of one-chip FED and OLEDs, organic thin film transistors and its device physics on scaling down effects. After getting Ph. D, he worked as a senior engineer in Samsung electronics for about 4 years. As a project manager, he researched on the development of Smart TEGs, advanced Samsung TFT model, model parameter extraction, and TCAD simulation for next generation TFTs in the panel design and computer aided engineering (CAE) group.
For nano and flexible electronics, he joined in in Prof. John A. Rogers’ group at University of Illinois at Urbana-Champaign (UIUC) since Nov. 2009. His main research accomplishments on purification of aligned carbon nanotubes outcome was published in Nature nanotech. 8, 347 (2013). After he served as BK assistant professor in Seoul National University in 2013, he joined in Incheon National University in 2014. His current research interests include hybrid multi-scale materials (SWNTs, TMDCs, Si, et) and devices for smart flexible system. Furthermore, he has extended his research scope toward neuromorphic devices, bio-and-chemical sensors, transient electronics, and supercapacitors as one of energy storage devices, for the bio-, eco-friendly-, security related applications.