Jump to main content
Jump to site search


Conductance switching at the nanoscale of diarylethene derivative self-assembled monolayers on La0.7Sr0.3MnO3

Author affiliations

Abstract

We report on the phosphonic acid route for the grafting of functional molecules, optical switch (dithienylethene diphosphonic acid, DDA), on La0.7Sr0.3MnO3 (LSMO). Compact self-assembled monolayers (SAMs) of DDA are formed on LSMO as studied by topographic atomic force microscopy (AFM), ellipsometry, water contact angle measurements and X-ray photoemission spectroscopy (XPS). The conducting AFM measurements show that the electrical conductance of LSMO/DDA is about 3 decades below that of a bare LSMO substrate. Moreover, the presence of the DDA SAM suppresses the known conductance switching of the LSMO substrate that is induced by mechanical and/or bias constraints during C-AFM measurements. A partial light-induced conductance switching between the open and closed forms of the DDA is observed for the LSMO/DDA/C-AFM tip molecular junctions (closed/open conductance ratio of about 8). We show that, in the case of long-time exposure to UV light, this feature can be masked by a non-reversible decrease (a factor of about 15) of the conductance of the LSMO electrode.

Graphical abstract: Conductance switching at the nanoscale of diarylethene derivative self-assembled monolayers on La0.7Sr0.3MnO3

Back to tab navigation

Supplementary files

Article information


Submitted
21 Nov 2019
Accepted
09 Mar 2020
First published
09 Mar 2020

Nanoscale, 2020, Advance Article
Article type
Paper

Conductance switching at the nanoscale of diarylethene derivative self-assembled monolayers on La0.7Sr0.3MnO3

L. Thomas, D. Guérin, B. Quinard, E. Jacquet, R. Mattana, P. Seneor, D. Vuillaume, T. Mélin and S. Lenfant, Nanoscale, 2020, Advance Article , DOI: 10.1039/C9NR09928J

Social activity

Search articles by author

Spotlight

Advertisements