Electrochemical switching of chromogenic monolayers self-assembled on transparent platinum electrodes

Salvatore Sortino, Santo Di Bella, Sabrina Conoci, Salvatore Petralia, Massimiliano Tomasulo, Eden J. Pacsial, Francisco Raymo

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Abstract

The electrochemical switching of chromogenic monolayers, which were self-assembled on ultrathin platinum working electrodes, was investigated. The monolayers were prepared by maintaining the transparent platinum electrodes in either methanol solutions of thioether for 24 h or methanol/chloroform solutions of thiol for 1 h. The high transmittance of the monolayers in the visible region permitted the spectroscopic interrogation of a single layer of chemisorbed chromophores in transmission mode. Under these conditions, the absorbance of an electroactive and chromogenic self-assembled monolayers could be switched reversibly by addressing the platinum substrates with appropriate voltage stimulations.

ASJC Scopus subject areas

  • Materials Science(all)

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