The Department of Materials Science and Engineering invites you to the following seminar:
Yeonwoong (Eric) Jung, Ph.D.
Postdoctoral Research Associate
Departments of Mechanical, Materials Science, and Electrical Engineering
Host: Prof. Petra Reinke
Talk Title: Opportunities from emerging 1D-to-2D materials for next-generation electronics:
phase-change memories and multifunctional solar energy devices
Date: Monday, March 9, 2015
Time: 4:00 to 5:00
Room: Wilsdorf 101
Refreshments: 3:30 to 4:00
Recent developments of functional low-dimensional materials have offered unprecedented scientific and technological opportunities. Highly interdisciplinary nature of the research on these materials has enabled the close-up inspection of multi-faceted yet challenging problems rising at the interfaces of seemingly unrelated areas. In this talk, I will discuss about scientific and technological opportunities that emerging one-dimensional (1D) to two-dimensional (2D) materials can offer for next-generation electronics and energy areas. The first part of my talk will discuss about scientific opportunities from 1D materials where phase-change nanowire electronic memories will be presented as a case study. Chemically-synthesized chalcogenide phase-change nanowires exhibit excellent electronic memory properties owing to their reversible switching between crystalline and amorphous phases. Detailed memory properties such as electrical switching and data-non volatility will be discussed in the context of nanoscale size effects on structural phase-change. Fundamentals behind the electrically-driven nanoscale amorphization of these materials are also unveiled by in-situ transmission electron microscopy, which provides critical information to explain such superior memory properties. The second part of my talk will focus on the technological aspects of emerging low-dimensional materials. I will talk about a low-cost manufacturing of carbonnanotube (CNT) thin films and their applications to multi-functional energy devices. Multi-scale translation of the superior opto-electrical and mechanical properties of CNT films realizes unconventional solar cells which combine a record high efficiency and a mechanical flexibility. Lastly, I will discuss about my future research plan to study emerging 2D heterostructured electronic materials. Fundamental sciences as well as novel transformative technologies will be pursued based on the rational integration of 2D materials and the better understanding of 2D transport. vs. topography relationships.
Bio: Yeonwoong (Eric) Jung earned a B.S degree from Seoul National University, Korea, in 2001, a M.S degree from the University of Illinois at Urbana-Champaign in 2003, a Ph.D. degree from the University of Pennsylvania in 2009, all in Materials Science and Engineering. Presently, he is a research associate at Yale University where he has been affiliated with Mechanical Engineering and Electrical Engineering departments. His research program is highly interdisciplinary and mainly centers in low-dimensional electronic materials for fundamental sciences and emerging technologies. He has authored or co-authored over 30 research articles, including Nature Nanotechnology, Nano Letters, and Science. He is the recipient of Materials Research Society (MRS) award, NBIC research excellence award, and S. J. Stein prize for best Ph.D. dissertation, and his works have been cited over 1,000 times.