Bottom-up electrochemical fabrication of conjugated ultrathin layers with tailored switchable properties

Verena Stockhausen; Van Quyen Nguyen; Pascal Martin; Jean Christophe Lacroix

doi:10.1021/acsami.6b08754

Bottom-up electrochemical fabrication of conjugated ultrathin layers with tailored switchable properties

Verena Stockhausen, Van Quyen Nguyen, Pascal Martin, Jean Christophe Lacroix

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

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.

Original language	English (US)
Pages (from-to)	610-617
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	9
Issue number	1
DOIs	https://doi.org/10.1021/acsami.6b08754
State	Published - Jan 11 2017
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the CNRS, the University Paris Diderot (Paris, France) and by a Ph.D. grant from the University of Science and Technology of Hanoi and a Grant no. 15-CE09-0001-01 from Agence Nationale de la Recherche (ANR)

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

Bottom-up approach
Diazonium grafting
Molecular electronics
Nanoelectrochemistry
Ultrathin film
π-conjugated material

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10.1021/acsami.6b08754

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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.",

keywords = "Bottom-up approach, Diazonium grafting, Molecular electronics, Nanoelectrochemistry, Ultrathin film, π-conjugated material",

author = "Verena Stockhausen and Nguyen, {Van Quyen} and Pascal Martin and Lacroix, {Jean Christophe}",

note = "Funding Information: This work was supported by the CNRS, the University Paris Diderot (Paris, France) and by a Ph.D. grant from the University of Science and Technology of Hanoi and a Grant no. 15-CE09-0001-01 from Agence Nationale de la Recherche (ANR) Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

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PY - 2017/1/11

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N2 - 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.

AB - 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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Bottom-up electrochemical fabrication of conjugated ultrathin layers with tailored switchable properties

Abstract

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