Functionalization of nanostructured hematite thin-film electrodes with the light-harvesting membrane protein C-phycocyanin yields an enhanced photocurrent

Debajeet K. Bora, Elena A. Rozhkova, K. Gajda-Schrantz, Pradeep P. Wyss, Artur Braun, Thomas Graule, Edwin C. Constable

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The integration of light-harvesting proteins and other photosynthetic molecular machinery with semiconductor surfaces plays an important role in improving their performance as solar-cell materials. Phycocyanin is one such protein that can be employed for this purpose. Phycocyanins have light-harvesting properties and belong to the phycobilisome protein family. They are present in cyanobacteria, which capture light energy and funnel it to reaction centers during photosynthesis. Here, a way of increasing the photocurrent of hematite by covalent cross-coupling with phycocyanin is reported. For this, a hematite-phycocyanin integrated system is assembled by consecutive adsorption and cross-coupling of protein molecules, separated by an agarose layer and a linker molecule, on the top of a mesoporous hematite film. The hematite-phycocyanin assembly shows a two-fold increased photocurrent in comparison with pristine hematite film. The increase in the photocurrent is attributed to the enhanced light absorption of the hematite film after integration with the protein, as is evident from the UV-vis spectra and from the photocurrent-action spectrum. The assembly shows long-term stability and thus constitutes a promising hybrid photoanode for photo-electrochemical applications.

Original languageEnglish
Pages (from-to)490-502
Number of pages13
JournalAdvanced Functional Materials
Volume22
Issue number3
DOIs
Publication statusPublished - Feb 8 2012

Fingerprint

Phycocyanin
Hematite
hematite
Protein C
Photocurrents
photocurrents
Membrane Proteins
membranes
proteins
Proteins
Membranes
Thin films
Electrodes
electrodes
thin films
cross coupling
assembly
funnels
Molecules
photosynthesis

Keywords

  • functionalization
  • hematite
  • integrated systems
  • photocurrents
  • phycocyanin
  • thin-film electrodes

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Functionalization of nanostructured hematite thin-film electrodes with the light-harvesting membrane protein C-phycocyanin yields an enhanced photocurrent. / Bora, Debajeet K.; Rozhkova, Elena A.; Gajda-Schrantz, K.; Wyss, Pradeep P.; Braun, Artur; Graule, Thomas; Constable, Edwin C.

In: Advanced Functional Materials, Vol. 22, No. 3, 08.02.2012, p. 490-502.

Research output: Contribution to journalArticle

Bora, Debajeet K. ; Rozhkova, Elena A. ; Gajda-Schrantz, K. ; Wyss, Pradeep P. ; Braun, Artur ; Graule, Thomas ; Constable, Edwin C. / Functionalization of nanostructured hematite thin-film electrodes with the light-harvesting membrane protein C-phycocyanin yields an enhanced photocurrent. In: Advanced Functional Materials. 2012 ; Vol. 22, No. 3. pp. 490-502.
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