5/28 研究科セミナー (本学客員准教授: Rainer Friedlein 氏)
MS-IV棟8階 中セミナー室 13：30 - 14：30
「Supramolecular Self-Assembly - From Genetic Matter to Organic Electronics」
本学客員准教授 Rainer Friedlein 氏
Inspired by life itself, numerous applications in biotechnology and organic electronics rely on template-mediated molecular self-assembly.
Most relevant in this context are quasi-one-dimensional assemblies of heterocyclic molecules that drive biological replication and genetic information processing, on one hand, and may allow charge transport mediated by the π electronic cores of the molecules that must be considered in damage mechanisms of genetic matter but is inspiring as well in terms of molecular electronics applications, on the other.
While the two-dimensional assembly of nucleic acids is largely based on hydrogen bonding interactions between complementary bases in Watson-Crick pairs, the crucial quasi-one-dimensional columnar assembly in the direction out of the molecular planes is driven by π-π interactions of the aromatic cores of the molecular heterocycles.
Here, I am reviewing systematic photoelectron spectroscopy studies of structural and electronic properties of thin highly-ordered multilayer films made of molecules ranging from polyaromatic hydrocarbons via porphyrins and discotic liquid crystalline materials to the building blocks of RNA and DNA, nucleosides and nucleotides. These studies reveal the strong connection between the capacity for assembly and electronic properties and functions of aromatic molecules in general and shed light on the mechanisms behind the original molecular self-assembly on surfaces that led to the emergence of self-replicating molecules in particular.
The formation of extended electronic states along the axis of such molecular stacks promote excellent and highly-anisotropic charge transport properties that are shown to depend on the structural details of the columns and that can be controlled by molecular design. This capacity together with the ability of processing from solutions promises novel entrypoints into transistor and photovoltaic applications in which the structure of heteroassemblies must be controlled locally and in which a fast transport of charge carriers is required.
1996 Master in Physics, Dresden University of Technology, Germany
2000 PhD in Physics, Institute of Solid State and Materials Research & Dresden University of Technology, Germany
2000-2002 Postdoctoral Scientist, Linköping University, Sweden
2004-2006 Research Assistant and Assistant Professor, Linköping University, Sweden
2004-2005 Visiting Professor, Chiba University, Japan
2006-2010 Lecturer, School of Materials Science & RCIS, JAIST
2010-2014 Associate Professor, School of Materials Science, JAIST
since 2014 Guest Associate Professor, JAIST
担当教員 マテリアルサイエンス研究科 准教授 高村 由起子（内線：1570）