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Self-assembled peptide monolayers on interdigitated gold microelectrodes

✍ Scribed by Emanuela Gatto; Mariano Venanzi; Antonio Palleschi; Lorenzo Stella; Basilio Pispisa; Leandro Lorenzelli; Claudio Toniolo; Fernando Formaggio; Giovanni Marletta

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
234 KB
Volume
27
Category
Article
ISSN
0928-4931

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✦ Synopsis

The electron conductivity and photocurrent generation properties of a self-assembled monolayer (SAM) formed by a helical hexapeptide chemisorbed on an interdigitated gold microelectrode have been investigated by cyclic voltammetry and photo-electrochemical experiments. Cyclic voltammetry measurements show that the peptide forms a densely packed self-assembled monolayer on the gold surface. Peculiar photocurrent/voltage responses have been obtained for the modified electrode, indicating that a photoinduced electron transfer from excited tryptophan to gold significantly contributes to the conductive properties of the peptide SAM.

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