Molecular Transistors
Affiliation: Yale University, USA
Host: Shaffique Adam
Abstract Details: Electron devices containing molecules as the active region have been an active area of research over the last few years. In molecular-scale devices, a long standing challenge has been to create a true three-terminal device; e.g., one that operates by modifying the internal energy structure of the molecule, analogous to conventional FETs. Here we report [1] the observation of such a solid- state molecular device, in which transport current is directly modulated by an external gate voltage. We have realized a molecular transistor made from the prototype molecular junction, benzene dithiol, and have used a combination of spectroscopies to determine the internal energetic structure of the molecular junction, and demonstrate coherent transport. [2,3] Resonance- enhanced coupling to the nearest molecular orbital is revealed by electron tunnelling spectroscopy, demonstrating for the first time direct molecular orbital gating in a molecular [1] H. Song et al., Nature 462, 1039 (2009) [2] H. Song et al., J. Appl. Phys. 109, 102419 (2011) [3] H. Song et al., J. Phys. Chem. C, 114, 20431 (2010)
About The Speaker: Prof. Mark A. Reed received his Ph.D. in Physics from Syracuse University in 1983, after which he joined Texas Instruments. In 1990 Mark joined Yale University where he holds the Harold Hodgkinson Chair of Engineering and Applied Science. He was chairman of the Department of Electrical Engineering from 1995 to 2001. He is presently the Associate Director of the Yale Institute for Nanoscience and Quantum Engineering. Mark’s research activities have included the investigation of electronic transport in nanoscale and mesoscopic systems, artificially structured materials and devices, molecular scale electronic transport, plasmonic transport in nanostructures, and chem/bio nanosensors. Mark is the author of more than 200 professional publications and 6 books, has given over 25 plenary and over 370 invited talks, and holds 25 U.S. and foreign patents on quantum effect, heterojunction, and molecular devices. He is the Editor in Chief of the journal Nanotechnology and holds numerous other editorial and advisory board positions. Mark has been elected to the Connecticut Academy of Science and Engineering and Who's Who in the World. His awards include; Fortune Magazine “Most Promising Young Scientist” (1990), the Kilby Young Innovator Award (1994), the Fujitsu ISCS Quantum Device Award (2001), the Yale Science and Engineering Association Award for Advancement of Basic and Applied Science (2002), Fellow of the American Physical Society (2003), the IEEE Pioneer Award in Nanotechnology (2007), Fellow of the Institute of Electrical and Electronics Engineers (2009), and a Finalist for the World Technology Award (2010).
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