Skip to main content
placeholder image

The detailed characterization of electrochemically switchable molecular assemblies on silicon electrodes

Journal Article


Download full-text (Open Access)

Abstract


  • In this paper we explore a multi-step synthetic strategy toward fabrication of monolayer-modified Si(100) electrodes that can be electrochemically switched. The synthetic scheme is modular and benefits from an established intramolecular lactonization scheme of benzoquinone analogs. A redox-tagged pendant group can be released from the surface such as to allow for in situ monitoring of the switch process. We show that this model system can be used to elucidate chemical and structural events for a surface dynamic system that is rapidly gaining popularity. The influence of polarization times, overpotentials and semiconductor doping type on the kinetic of the switch event is also investigated. In both basic and acidic aqueous electrolytes the release of suitable redox-active markers is found to require unexpectedly large cathodic overpotentials. The release event is accompanied by minor oxidation of the electrode surface and the switched constructs can be regenerated by chemical means with no appreciable deterioration of surface quality. © 2013 the Owner Societies.

Authors


  •   Ciampi, Simone (external author)
  •   James, Michael (external author)
  •   Choudhury, Moinul H. (external author)
  •   Darwish, Nadim A. (external author)
  •   Gooding, J Justin. (external author)

Publication Date


  • 2013

Citation


  • Ciampi, S., James, M., Choudhury, M. H., Darwish, N. A. & Gooding, J. Justin. (2013). The detailed characterization of electrochemically switchable molecular assemblies on silicon electrodes. Physical Chemistry Chemical Physics, 15 (24), 9879-9890.

Scopus Eid


  • 2-s2.0-84878693725

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2962&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1960

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 9879

End Page


  • 9890

Volume


  • 15

Issue


  • 24

Place Of Publication


  • United Kingdom

Abstract


  • In this paper we explore a multi-step synthetic strategy toward fabrication of monolayer-modified Si(100) electrodes that can be electrochemically switched. The synthetic scheme is modular and benefits from an established intramolecular lactonization scheme of benzoquinone analogs. A redox-tagged pendant group can be released from the surface such as to allow for in situ monitoring of the switch process. We show that this model system can be used to elucidate chemical and structural events for a surface dynamic system that is rapidly gaining popularity. The influence of polarization times, overpotentials and semiconductor doping type on the kinetic of the switch event is also investigated. In both basic and acidic aqueous electrolytes the release of suitable redox-active markers is found to require unexpectedly large cathodic overpotentials. The release event is accompanied by minor oxidation of the electrode surface and the switched constructs can be regenerated by chemical means with no appreciable deterioration of surface quality. © 2013 the Owner Societies.

Authors


  •   Ciampi, Simone (external author)
  •   James, Michael (external author)
  •   Choudhury, Moinul H. (external author)
  •   Darwish, Nadim A. (external author)
  •   Gooding, J Justin. (external author)

Publication Date


  • 2013

Citation


  • Ciampi, S., James, M., Choudhury, M. H., Darwish, N. A. & Gooding, J. Justin. (2013). The detailed characterization of electrochemically switchable molecular assemblies on silicon electrodes. Physical Chemistry Chemical Physics, 15 (24), 9879-9890.

Scopus Eid


  • 2-s2.0-84878693725

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2962&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1960

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 9879

End Page


  • 9890

Volume


  • 15

Issue


  • 24

Place Of Publication


  • United Kingdom