Jump to main content
Jump to site search

Issue 10, 2011
Previous Article Next Article

Self-assembly of supramolecular wires and cross-junctions and efficient electron tunnelling across them

Author affiliations

Abstract

The self-assembly of molecules incorporating π-electron rich units into supramolecular wires is shown by scanning tunnelling microscopy (STM) at a graphite–liquid interface. Hydrogen bonds between the side chains of these molecules ensure a face-to-face contact between the functional moieties, which would otherwise lie flat on the surface if the amide groups affording this effect were absent. The organisation in the wires also depends critically on the constitution of the molecule: The cis and trans isomers show ordered and disordered spacing between wires, respectively. The supramolecular wires formed by the cis isomer form crossed architectures, with multilayers of the linear structures being formed. Study of the junction points between the fibres by scanning tunnelling spectroscopy shows that tunnelling electrons are transported efficiently, practically with the same probability as through a single wire. Molecular modelling is used to determine how the π-electron rich units within two crossing wires organise at the crossing. Based on those structural data, the electron tunnelling probability between tip and substrate is then calculated; it shows that electron transmission can indeed take place at the crossing. This result implies that supramolecular fibres can be used as wires in order to build integrated circuits by bottom-up construction from the molecule scale.

Graphical abstract: Self-assembly of supramolecular wires and cross-junctions and efficient electron tunnelling across them

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 May 2011, accepted on 15 Jun 2011 and first published on 21 Jul 2011


Article type: Edge Article
DOI: 10.1039/C1SC00330E
Citation: Chem. Sci., 2011,2, 1945-1951
  •   Request permissions

    Self-assembly of supramolecular wires and cross-junctions and efficient electron tunnelling across them

    J. Puigmartí-Luis, A. Minoia, S. Lei, V. Geskin, B. Li, R. Lazzaroni, S. De Feyter and D. B. Amabilino, Chem. Sci., 2011, 2, 1945
    DOI: 10.1039/C1SC00330E

Search articles by author

Spotlight

Advertisements