Mini-Symposium on "Chirality at the Nanoscale" featuring Karl-Heinz Ernst (University of Zurich)

Who: Multiple speakers
Thursday, August 17, 2017 - 8:30am to 12:45pm
Thaw Hall 102

Plenary Lecture: Karl-Heinz Ernst (University of Zurich)

Helical molecules in flatland: chiral recognition, spin-filtering and molecular machines

Molecular recognition among chiral molecules on surfaces is of paramount importance in biomineralization, enantioselective heterogeneous catalysis, and for the separation of chiral molecules into their two mirror-image isomers (enantiomers) via crystallization or chromatography. Understanding the principles of molecular recognition in general, however, is a difficult task and calls for investigation of appropriate model systems. One popular approach is thereby studying intermolecular interactions on well-defined solid surfaces, which allows in particular the use of scanning tunneling microscopy (STM). Examples of chiral amplification via the so-called ‘sergeant-and-soldiers’ effect as well as manipulation of chiral adsorbates via inelastic electron tunneling will be presented. In a Pasteur-type experiment at the nanoscale, molecules that constitute a dimer are spatially separated with a molecular STM tip and their absolute handedness is determined with submolecular resolution STM. Moreover, we report spin-dependent filtering of electrons by monolayers of these helical molecules. Finally the first successful electrical current-driven, unidirectional motion of a synthetic molecule will be presented (figure).




8:40 am

Kalle Ernst

Helical molecules in flatland: chiral recognition, spin-filtering and molecular machines

9:30 am

Ronchao Jin

Atomic origins of chirality in gold nanoclusters

10:00 am

Peng Liu

Ligand effects in asymmetric transition-metal catalysis

10:30 am



10:45 am

Catalina Achim

Chirality in Supramolecular Structures Based on Nucleic Acids and Transition Metals

11:15 am

Dave Waldeck

Adventures in chiral induced spin selectivity

11:45 am

Yanan Dai

Imaging chiral surface plasmons with photoelectrons

12:15 pm

Andy Gellman

Surface structure sensitive enantioselectivity

12:45 pm