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Forced To Align: Flow-Induced Long-Range Alignment of Hierarchical Molecular Assemblies from 2D to 3D

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journal contribution
posted on 19.03.2014 by Shern-Long Lee, Zhongyi Yuan, Long Chen, Kunal S. Mali, Klaus Müllen, Steven De Feyter
Nanostructured molecular thin films adsorbed on solid surfaces form the basis of numerous applications. Long-range order within adsorbed molecules is very often a desirable property for such systems. In this contribution, we report a simple and efficient method to fabricate well-aligned thin films of organic molecules over a few millimeter squares. The strategy involves use of capillary force in a two-step flow method to induce large-area alignment of multilayers of molecules at the organic liquid–solid interface. Furthermore, we also demonstrate the influence of alignment on the electron transport through these well-aligned thin films using scanning tunneling spectroscopy.