Evaporation induced self-assembly of templated silica and organosilica thin films on various electrode surfaces

Abstract : A new one-step method is reported for the deposition of hybrid mesoporous thin films on various electrode surfaces (gold, platinum, glassy carbon). Deposition was achieved by spin-coating sol–gel mixtures in the presence of a surfactant template to get mesostructured thin layers on the various conducting substrates. Film formation occurred by evaporation induced self-assembly (EISA) involving the hydrolysis and (co)condensation of silane and/or organosilane precursors on the electrode surface. Extraction of the surfactant from the ordered mesoporous films led to a large increase of mass transport rates into the materials and imparted high accessibility to the organic moieties in case of functionalized mesoporous overlayers. The electrochemical properties of the film-modified electrodes have been studied by cyclic voltammetry (CV), and also via the chemical accumulation of mercury ions prior to their stripping analysis by differential pulse voltammetry (i.e. for thiol-functionalized thin films). Some evidences to support the formation of self-assembled monolayers (SAMs) on electrodes, have been also discussed. The formation of well-adhering mesoporous thin films on solid electrode surfaces is expected to have a high impact on the development of new electrochemical sensors.
Document type :
Journal articles
Complete list of metadatas

https://hal.univ-lorraine.fr/hal-01941956
Contributor : Alain Walcarius <>
Submitted on : Sunday, December 2, 2018 - 7:33:24 PM
Last modification on : Monday, August 12, 2019 - 1:38:02 PM

Identifiers

Collections

Citation

Mathieu Etienne, Alain Walcarius. Evaporation induced self-assembly of templated silica and organosilica thin films on various electrode surfaces. Electrochemistry Communications, Elsevier, 2005, 7 (12), pp.1449-1456. ⟨10.1016/j.elecom.2005.10.010⟩. ⟨hal-01941956⟩

Share

Metrics

Record views

26