1:30pm - 2:30pm
Room 501 NW Corner Building
550 West 120th Street
New York, NY 10027
Single-molecule electronics is an emerging subfield of nanoelectronics where the ultimate goal is to use individual molecules as the active components in electronic circuitry. Over the past century, chemists have developed a rich understanding of how a molecule’s structure determines its electronic properties; incorporating this knowledge base into the design and understanding of single-molecule electronic devices can thus provide a tremendous impetus for growth in the field. In this talk I will describe how we can harness the principles of organosilicon chemistry to control charge transport and install function in single-molecule devices. Through collaboration with the Venkataraman group, we use a scanning tunneling microscope-based break-junction (STM-BJ) technique to probe structure-conductivity relationships in silicon- and germanium-based wires. We deconstruct the molecular junction into three subcomponents (backbone, substituent, and anchor) to investigate how synthetic alterations to each subcomponent affects conductance. Our studies ultimately demonstrate that charge transport in these systems is dictated by the conformation, conjugation, polarizability, and polarity of the σ-backbone. Furthermore, we exploit principles from reaction chemistry such as strain-release Lewis acidity and σ-bond stereoelectronics to create new types of digital conductance switches.
Wednesday, June 15, 2016 at 1:30pm in Room 501 NW Corner
Department of Chemistry, Columbia University, Havemeyer Hall, 3000 Broadway, New York, NY 10027, USA | 212-854-2202 | http://chem.columbia.edu/