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

Verena Stockhausen | Zendy; VanQuynh Nguyen | Zendy; Pascal Martin | Zendy; Jean Lacroix | Zendy

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

Author(s) -

Verena Stockhausen,

VanQuynh Nguyen,

Pascal Martin,

Jean Lacroix

Publication year - 2016

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.6b08754

Subject(s) - materials science , covalent bond , electrochemistry , conjugated system , fabrication , electrode , layer (electronics) , nanometre , nanotechnology , chemical engineering , redox , polymer , organic chemistry , composite material , medicine , chemistry , alternative medicine , pathology , engineering , metallurgy

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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