Bottom-Up Electrochemical Fabrication of Conjugated Ultrathin Layers with Tailored Switchable Properties - Université Paris Cité Access content directly
Journal Articles ACS Applied Materials & Interfaces Year : 2017

Bottom-Up Electrochemical Fabrication of Conjugated Ultrathin Layers with Tailored Switchable Properties

Abstract

A bottom-up electrochemical process for fabricating conjugated ultrathin layers with tailored switchable properties is developed. Ultrathin layers of covalently grafted oligo(bisthienylbenzene) (oligo(BTB)) are used as switchable organic electrodes, and 3,4-ethylenedioxythiophene (EDOT) is oxidized on this layer. Adding only a few (less than 3) nanometers of EDOT moieties (5 to 6 units) completely changes the switching properties of the layer without changing the surface concentration of the electroactive species. A range of new materials with tunable interfacial properties is created. They consist of oligo(BTB)-oligo(EDOT) diblock oligomers of various relative lengths covalently grafted onto the underlying electrode. These films retain reversible redox on/off switching and their switching potential can be finely tuned between +0.6 and −0.3 V/SCE while the overall thickness remains below 11 nm.
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Dates and versions

hal-01821774 , version 1 (25-06-2018)

Identifiers

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Verena Stockhausen, van Quyen Nguyen, Pascal G.P. Martin, Jean Christophe Lacroix. Bottom-Up Electrochemical Fabrication of Conjugated Ultrathin Layers with Tailored Switchable Properties. ACS Applied Materials & Interfaces, 2017, 9 (1), pp.610-617. ⟨10.1021/acsami.6b08754⟩. ⟨hal-01821774⟩
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