Institution of Biorefinery Engineers, Scientists and Technologists

The Institution of Biorefinery Engineers, Scientists and Technologists

Organic nanosheet separation for molecular electronics

Posted by The IBEST on 29 June, 2016 at 2:10

Molecular electronics is a fascinating rapidly growing field. An international team has discovered an elegant way to decouple organic nanosheets grown on metal surfaces. After iodine intercalation, a network of organic molecules behaved almost as it was free-standing. The strong influence of the metal on the network was reduced. This opens up new ways to transfer organic nanostructures from metal surfaces onto more suitable substrates for molecular electronics.

Specific organic molecules – typically on reactive metallic surfaces – can interlink via chemical bond formation into extended nanostructures. Highly stable two-dimensional molecular networks can be grown in this manner. However, these networks then adhere to the metallic support, which also strongly influences their properties. To make use of these kinds of organic networks in molecular electronics, for instance, the metal would have to be laboriously removed.

Iodine vapour reduces this adhesion.  The iodine actually migrated beneath the interlinked phenyl rings to form an atomically thin interlayer on the metal surface.

More reading here: Post-Synthetic Decoupling of On-Surface Synthesized Covalent Nanostructures from Ag(111), Atena Rastgoo-Lahrood, Jonas Björk, Matthias Lischka, Johanna Eichhorn, Stephan Kloft, Massimo Fritton, Thomas Strunskus, Debabrata Samanta, Michael Schmittel, Wolfgang M. Heckl, Markus Lackinger, Angew. Chem. Int. Ed.. doi: 10.1002/anie.201600684

Categories: Research news, New publications, Other news

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1 Comment

Reply The IBEST
4:26 on 29 June, 2016 
Given the ease of separation found out in the paper, it is possible to synthesise organic nanosheet by microbial electrosynthesis process. In microbial electrosynthesis, metallic nanowire cathode can be used for CO2 reduction reaction into organic molecules, which can be deposited on the cathode. The anode process harvests electrons from organic waste substrates and produces carbon dioxide, while the cathode process uses electrons in making the organic product reusing CO2. ... just a thought!