Ambient Bistable Single Dipole Switching in a Molecular Monolayer

Cui, K. and Mali, K.S. and Wu, D. and Feng, X. and Müllen, K. and Walter, M. and De Feyter, S. and Mertens, S.F.L. (2020) Ambient Bistable Single Dipole Switching in a Molecular Monolayer. Angewandte Chemie - International Edition. ISSN 1433-7851

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Reported here is a molecular dipole that self‐assembles into highly ordered patterns at the liquid‐solid interface, and it can be switched at room temperature between a bright and a dark state at the single‐molecule level. Using a scanning tunneling microscope (STM) under suitable bias conditions, binary information can be written at a density of up to 41 Tb cm−2 (256 Tb/in2). The written information is stable during reading at room temperature, but it can also be erased at will, instantly, by proper choice of tunneling conditions. DFT calculations indicate that the contrast and switching mechanism originate from the stacking sequence of the molecular dipole, which is reoriented by the electric field between the tip and substrate.

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Journal Article
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Angewandte Chemie - International Edition
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This is the peer reviewed version of the following article: K. Cui, K. S. Mali, D. Wu, X. Feng, K. Müllen, M. Walter, S. De Feyter, S. F. L. Mertens, Angew. Chem. Int. Ed. 2020, 59, 14049 which has been published in final form at This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
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08 Sep 2020 11:30
Last Modified:
18 Sep 2023 01:47