Photoelectron generation by photosystem II core complexes tethered to gold surfaces

Michele Vittadello, Maxim Y. Gorbunov, Daniel T. Mastrogiovanni, Leszek S. Wielunski, Eric Garfunkel, Fernando Guerrero, Diana Kirilovsky, Miwa Sugiura, A. William Rutherford, Ahmad Safari, Paul G. Falkowski

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

By using a nondestructive, ultrasensitive, fluorescence kinetic technique, we measure in situ the photochemical energy conversion efficiency and electron transfer kinetics on the acceptor side of histidine-tagged photosystem II core complexes tethered to gold surfaces. Atomic force microscopy images coupled with Rutherford backscattering spectroscopy measurements further allow us to assess the quality, number of layers, and surface density of the reaction center films. Based on these measurements, we calculate that the theoretical photoelectronic current density available for an ideal monolayer of core complexes is 43 mAcm-2 at a photon flux density of 2000 mmolquanta m-2 s-1 between 365 and 750 nm. While this current density is approximately two orders of magnitude lower than the best organic photovoltaic cells (for an equivalent area), it provides an indication for future improvement strategies. The efficiency could be improved by increasing the optical cross section, by tuning the electron transfer physics between the core complexes and the metal surface, and by developing a multilayer structure, thereby making biomimetic photoelectron devices for hydrogen generation and chemical sensing more viable.

Original languageEnglish
Pages (from-to)471-475
Number of pages5
JournalChemSusChem
Volume3
Issue number4
DOIs
Publication statusPublished - Apr 2010

Fingerprint

Photosystem II Protein Complex
Photoelectrons
Gold
gold
density current
Current density
electron
kinetics
photon flux density
Kinetics
atomic force microscopy
Electrons
Photovoltaic cells
Coordination Complexes
Rutherford backscattering spectroscopy
Biomimetics
Energy conversion
Histidine
Conversion efficiency
Hydrogen

Keywords

  • Electron transfer
  • Fluorescence
  • Photosynthesis
  • Self-assembly
  • Surface chemistry

ASJC Scopus subject areas

  • Energy(all)
  • Environmental Chemistry
  • Materials Science(all)
  • Chemical Engineering(all)

Cite this

Vittadello, M., Gorbunov, M. Y., Mastrogiovanni, D. T., Wielunski, L. S., Garfunkel, E., Guerrero, F., ... Falkowski, P. G. (2010). Photoelectron generation by photosystem II core complexes tethered to gold surfaces. ChemSusChem, 3(4), 471-475. https://doi.org/10.1002/cssc.200900255

Photoelectron generation by photosystem II core complexes tethered to gold surfaces. / Vittadello, Michele; Gorbunov, Maxim Y.; Mastrogiovanni, Daniel T.; Wielunski, Leszek S.; Garfunkel, Eric; Guerrero, Fernando; Kirilovsky, Diana; Sugiura, Miwa; William Rutherford, A.; Safari, Ahmad; Falkowski, Paul G.

In: ChemSusChem, Vol. 3, No. 4, 04.2010, p. 471-475.

Research output: Contribution to journalArticle

Vittadello, M, Gorbunov, MY, Mastrogiovanni, DT, Wielunski, LS, Garfunkel, E, Guerrero, F, Kirilovsky, D, Sugiura, M, William Rutherford, A, Safari, A & Falkowski, PG 2010, 'Photoelectron generation by photosystem II core complexes tethered to gold surfaces', ChemSusChem, vol. 3, no. 4, pp. 471-475. https://doi.org/10.1002/cssc.200900255
Vittadello M, Gorbunov MY, Mastrogiovanni DT, Wielunski LS, Garfunkel E, Guerrero F et al. Photoelectron generation by photosystem II core complexes tethered to gold surfaces. ChemSusChem. 2010 Apr;3(4):471-475. https://doi.org/10.1002/cssc.200900255
Vittadello, Michele ; Gorbunov, Maxim Y. ; Mastrogiovanni, Daniel T. ; Wielunski, Leszek S. ; Garfunkel, Eric ; Guerrero, Fernando ; Kirilovsky, Diana ; Sugiura, Miwa ; William Rutherford, A. ; Safari, Ahmad ; Falkowski, Paul G. / Photoelectron generation by photosystem II core complexes tethered to gold surfaces. In: ChemSusChem. 2010 ; Vol. 3, No. 4. pp. 471-475.
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