Hi,

The CORE-CM seminar this week is:

March 14: Pengpeng Zhang
Physics and Astronomy, Michigan State University
"Growth of light harvesting organic molecules on inorganic substrates"
The abstract is below

BPS 1400 at 12:00pm,
Pizza and cookies available at 11:45am

Phil  Duxbury
Full seminar list is at:
http://www.pa.msu.edu/cmp/CORE-CM/SeminarSpring2013.html

Control of highly ordered organic molecular thin films with extended π systems is currently of intense interest for integration into modern electronics due to the tunable nature of organic molecules. Selection of molecules and substrate can lead to desired transport properties such as charge transfer, charge injection, exciton diffusion, etc., at the hybrid heterointerface, which is central to the development of organic and molecular electronics. However, achieving large-scale molecular ordering remains a significant challenge. I will discuss our recent discovery of anisotropic crystalline organic step-flow growth on deactivated Si surfaces that exhibits no true commensurism despite a single dominate long-range ordered relationship between the organic crystalline film and the substrate, uniquely distinct from inorganic epitaxial growth.1 This growth mode can likely be generalized for a range of organic molecules and access it to offers the potential for improved performance for organic field effect transistors, photovoltaics and nanowire and nanoribbon devices.

  1. S. R. Wagner, et al., Phys. Rev. Lett. 110, 086107 (2013).