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 longstanding 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 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. Resonance-enhanced coupling to the nearest molecular orbital is revealed by electron tunneling spectroscopy, demonstrating for the first time direct molecular orbital gating in a molecular electronic device.

We further demonstrate that energetic orbital positions can be modified by appropriate endgroup and sidegroup substitutions.  Modifications of endgroups allows the realization of complimentary single molecule FET devices.  Systematic sidegroup substitutions of varying electronegativity allows a systematic engineering of orbital positions, analogous to threshold voltage control.  The unique device characteristics that these types of molecular devices enable will be discussed.

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报告人简介：

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, and is the Associate Director of the Yale Institute for Nanoscience and Quantum Engineering.  His 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 180 professional publications and 6 books, has given 19 plenary and over 260 invited talks, and holds 25 U.S. and foreign patents on quantum effect, heterojunction, and molecular devices.  He 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), and Fellow of the Institute of Electrical and Electronics Engineers (2009).

Vincenzo Mirabello attended the University of Palermo in Italy where he obtained a Master’s degree in Chemistry and Pharmaceutical Technology in 2008. He completed his PhD in Chemistry in 2012 at University of Florence and ICCOM-CNR, Institute for the Chemistry of OrganoMetallic Compounds. His PhD work involved the NMR studies of Solution and Solid‐State Dynamics of Metal‐Coordinated White Phosphorus. In 2013, he joined the Department of Chemistry of the University of Bath, UK, where he worked as Postdoctoral Research Associate until 2018. He worked on a number of projects including the use of CdSe and CdZnSe quantum dots, silica nanoparticles, nanohybrid of Graphene oxide for in vitro bioimaging and oxygen sensing. He also worked in the field of supramolecular chemistry, confocal microscopy and fluorescence life time imaging. Since 2018, Vincenzo has been working at IOP Publishing and is Associate Publisher of Nanotechnology and Nano Futures. He authored over 20 peer-reviewed articles.