Materials Science & NanoEngineering
Dean of Engineering
Professor of Electrical and Computer Engineering and Director of the Nanoelectronics Research Lab
University of California Santa Barbara
Graduate Seminar Series - 2D Crystals for Nanoelectronics and Beyond
Thursday, April 9, 2015
to 4:00 PM
1070 George R. Brown Hall
6100 Main Street
Houston, Texas, USA
The experimental demonstration of graphene in 2004, a truly one-atom thick layer of carbon atoms, has opened up a window to the two-dimensional (2D) world of materials. This has subsequently triggered a surge of research activities on various 2D crystals including single layers of hexagonal-boron nitride (h-BN), several dichalcogenides (such as MoS2 and WSe2), and complex oxides, which have been successively prepared using the micromechanical exfoliation technique employed for graphene. The ease of preparing these 2D crystals for demonstrating various prototype applications relies on the layered structures of their 3D bulk materials, where adjacent layers are held together by the relatively weak van der Waals bonds, while strong valence bonds firmly pack the in-plane atoms together. Two common features shared by all 2D crystals are the atomic scale thickness, which leads to novel physics and interesting applications, and the pristine interfaces that potentially promise stable chemical, electrical, and thermal characteristics. Atomic scale thicknesses (few Å/layer) of 2D semiconducting crystals and their controllable precise band gaps as a function of number of layers also enable the scaling of electronic devices without inducing performance variations. Moreover, seamless planar synthesis and stacking of various 2D crystals can be exploited to build novel lateral and vertical heterostructures, respectively. This talk will highlight and discuss the prospects of such 2D crystals for designing low-power, low-loss and ultra energy-efficient active and passive devices targeted for designing next-generation green electronics. It will also bring forward some applications uniquely enabled by 2D crystals, including sensors and high-frequency devices and circuits for improving quality of life, and discuss related challenges and opportunities.
Biography of Kaustav Banerjee:
Kaustav Banerjee is a Professor of Electrical and Computer Engineering and Director of the Nanoelectronics Research Lab at UC Santa Barbara. Initially trained as a physicist, he received the Ph.D. degree in Electrical Engineering and Computer Sciences from the University of California, Berkeley, in 1999. His current research focuses on the physics, technology and applications of low-dimensional materials such as graphene and other 2D materials for next-generation green electronics, photonics and bioelectronics. Prof. Banerjee has made seminal contributions in nearly every aspect of nanoelectronics and his ideas and innovations chronicled in over 275 publications (with h-index of 50) have not only received thousands of citations but also have played a decisive role in steering worldwide research. Prof. Banerjee is considered one of the key visionaries behind three-dimensional (3D) IC technology being employed by the semiconductor industry for continued scaling and integration beyond Moore’s law, as well as the pioneer behind thermal-aware design methods and tools used in the IC design industry. His technical contributions have been recognized with numerous awards and honors including the prestigious Friedrich Wilhelm Bessel Research Award, presented to him in 2011 by Alexander von Humboldt Foundation, Germany, for his outstanding contributions to nanoelectronics. Prof. Banerjee is a Fellow of the Institute of Electrical and Electronics Engineers (IEEE) and the American Physical Society (APS), and the recipient of an IEEE Technical Field Award- the 2015 Kiyo Tomiyasu Award.