High photocurrent generation by photosystem I on artificial interfaces composed of π-system-modified graphene

Feifel, Sven C.; Stieger, Kai Ralf; Lokstein, Heiko; Lux, Helge; Lisdat, Fred

doi:10.1039/c5ta00656b

Cited by 72 publications

(65 citation statements)

References 68 publications

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“…The class of pyrene-derivative molecules has proven to be successful for stability, integration and preservation of the activity of redox active catalysts, such as the water-splitting Cu catalyst, 28 and photoactive enzymes, such as photosystem I, following their immobilisation on graphenebased electrodes. 29 Thus, the creation of a stable interface between graphene and a self-assembled monolayer (SAM) is of crucial importance to improve the DET in between the biological system and the metal electrode and to obtain a high performance device for biomolecular nanoelectronics.…”

Section: Introductionmentioning

confidence: 99%

Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

et al. 2018

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“…Many groups have investigated the properties of PSI deposited onto various substrates. The most commonly used substrates are: chemically modified gold electrodes (Ciesielski et al 2010; Mukherjee and Khomami 2011), semiconductors like TiO 2 or ZnO (Mershin et al 2012; Yu et al 2015), and graphene (Gunther et al 2013; Feifel et al 2015). For most of the aforementioned works, the main evidence of intactness of the structure and function of PSI was its photoelectrochemical response.…”

Section: Introductionmentioning

confidence: 99%

Comparison of excitation energy transfer in cyanobacterial photosystem I in solution and immobilized on conducting glass

et al. 2016

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Excitation energy transfer in monomeric and trimeric forms of photosystem I (PSI) from the cyanobacterium Synechocystis sp. PCC 6803 in solution or immobilized on FTO conducting glass was compared using time-resolved fluorescence. Deposition of PSI on glass preserves bi-exponential excitation decay of ~4–7 and ~21–25 ps lifetimes characteristic of PSI in solution. The faster phase was assigned in part to photochemical quenching (charge separation) of excited bulk chlorophylls and in part to energy transfer from bulk to low-energy (red) chlorophylls. The slower phase was assigned to photochemical quenching of the excitation equilibrated over bulk and red chlorophylls. The main differences between dissolved and immobilized PSI (iPSI) are: (1) the average excitation decay in iPSI is about 11 ps, which is faster by a few ps than for PSI in solution due to significantly faster excitation quenching of bulk chlorophylls by charge separation (~10 ps instead of ~15 ps) accompanied by slightly weaker coupling of bulk and red chlorophylls; (2) the number of red chlorophylls in monomeric PSI increases twice—from 3 in solution to 6 after immobilization—as a result of interaction with neighboring monomers and conducting glass; despite the increased number of red chlorophylls, the excitation decay accelerates in iPSI; (3) the number of red chlorophylls in trimeric PSI is 4 (per monomer) and remains unchanged after immobilization; (4) in all the samples under study, the free energy gap between mean red (emission at ~710 nm) and mean bulk (emission at ~686 nm) emitting states of chlorophylls was estimated at a similar level of 17–27 meV. All these observations indicate that despite slight modifications, dried PSI complexes adsorbed on the FTO surface remain fully functional in terms of excitation energy transfer and primary charge separation that is particularly important in the view of photovoltaic applications of this photosystem.

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“…13,14 Graphene owing to its high electrical conductivity, 15 high carrier mobility, 16 high power density, 17 large surface areas ($2600 m 2 g À1 ), 18 sustainability 19,20 and roll-to-roll compatibility, 21 offers an ideal choice for enhancing the electronic properties of optoelectronic materials when forming composites. 22,23 Azarang et al 24 have observed that ZnO/rGO composite (1.7 wt% rGO) shows enhanced photocurrent generation of 1.22 mA cm À2 , which is three times higher than that observed for pristine ZnO. Sookhakian et al 25 have found ZnS/rGO composite shows higher photocurrent generation of 1.9 mA cm À2 .…”

Section: Introductionmentioning

confidence: 99%

Organic semiconductor/graphene oxide composites as a photo-anode for photo-electrochemical applications

et al. 2018

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High photocurrent generation by photosystem I on artificial interfaces composed of π-system-modified graphene

Abstract: We report on the development of graphene-nanobiohybrid light-harvesting electrodes consisting of photosystem I and π-system modified graphene electrodes.

Cited by 72 publications

References 68 publications

Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

Controlling the charge transfer flow at the graphene/pyrene–nitrilotriacetic acid interface

Comparison of excitation energy transfer in cyanobacterial photosystem I in solution and immobilized on conducting glass

Organic semiconductor/graphene oxide composites as a photo-anode for photo-electrochemical applications

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