Evidence for deep acceptor centers in plant photosystem I crystals

Irina Volotsenko, Michel Molotskii, Anna Borovikova, Nathan Nelson, Yossi Rosenwaks

Research output: Contribution to journalArticlepeer-review

Abstract

Dry micrometer-thick crystalline photosystem I (PSI) has been shown to generate unprecedented large photovoltage under illumination. We use variable-temperature Kelvin probe force microscopy to show that deep acceptor centers are responsible for this anomalous photovoltage. We assumed that these centers are located close to the positively charged FB2+ clusters, forming a coupled center that effectively captures the photoexcited electron into a deep state. We extract the main inherent parameters of the deep centers, which are extremely important in the potential use of photosynthetic proteins in various optoelectronic devices. (Graph Presented).

Original languageEnglish
Pages (from-to)1374-1379
Number of pages6
JournalJournal of Physical Chemistry B
Volume119
Issue number4
DOIs
StatePublished - 29 Jan 2015

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