Fabrication of oriented multilayers of photosystem I proteins on solid surfaces by auto-metallization

Ludmila Frolov, Ofer Wilner, Chanoch Carmeli, Itai Carmeli

Research output: Contribution to journalArticlepeer-review

63 Scopus citations


The fabrication of serially oriented multilayers mediated by the deposition of platinum on top of polystyrene (PS) layers and sequential binding of layers through the formation of sulfide bonds between genetically engineered unique cysteine mutants Y635C of the protein and the metal was investigated. Each protein was washed and the monolayer was dried under nitrogen. Platinum was deposited on the protein by photo-reducing Pt4+ ions in solution by the vectorially oriented PS I layers. The source of electrons from the light-activated PS I that was continuously reduced by ascorbate dichlorophynol in the solution. The photo-reduction of Pt4+ ions, which resulted in the deposition of Pt patches at the reducing end of PS I through the formation of sulfide bonds. The larger absorption cross-section and the serial arrangement of PS I resulted in an increase in the photovoltage generated by the multilayer.

Original languageEnglish
Pages (from-to)263-266
Number of pages4
JournalAdvanced Materials
Issue number2
StatePublished - 18 Jan 2008
Externally publishedYes


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