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Title: | Fluorescence and electron transfer of Limnospira indica functionalized biophotoelectrodes | Authors: | Ryzhkov, Nikolay COLSON, Nora AHMED, Essraa POBEDINSKAS, Paulius HAENEN, Ken JANSSEN, Paul Braun, Artur |
Issue Date: | 2024 | Publisher: | SPRINGER | Source: | PHOTOSYNTHESIS RESEARCH, | Status: | Early view | Abstract: | Cyanobacteria play a crucial role in global carbon and nitrogen cycles through photosynthesis, making them valuable subjects for understanding the factors influencing their light utilization efficiency. Photosynthetic microorganisms offer a promising avenue for sustainable energy conversion in the field of photovoltaics. It was demonstrated before that application of an external electric field to the microbial biofilm or cell improves electron transfer kinetics and, consequently, efficiency of power generation. We have integrated live cyanobacterial cultures into photovoltaic devices by embedding Limnospira indica PCC 8005 cyanobacteria in agar and PEDOT:PSS matrices on the surface of boron-doped diamond electrodes. We have subjected them to varying external polarizations while simultaneously measuring current response and photosynthetic performance. For the latter, we employed Pulse-Amplitude-Modulation (PAM) fluorometry as a non-invasive and real-time monitoring tool. Our study demonstrates an improved light utilization efficiency for L. indica PCC 8005 when immobilized in a conductive matrix, particularly so for low-intensity light. Simultaneously, the impact of electrical polarization as an environmental factor influencing the photosynthetic apparatus diminishes as matrix conductivity increases. This results in only a slight decrease in light utilization efficiency for the illuminated sample compared to the dark-adapted state. | Notes: | Ryzhkov, N; Braun, A (corresponding author), Empa Swiss Fed Labs Mat Sci & Technol, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland. nrzhkv@gmail.com; artur.braun@alumni.ethz.ch |
Keywords: | PAM-fluorescence;Limnospira indica;Photoelectrochemistry;Photoelectrochemical cell | Document URI: | http://hdl.handle.net/1942/43669 | ISSN: | 0166-8595 | e-ISSN: | 1573-5079 | DOI: | 10.1007/s11120-024-01114-5 | ISI #: | 001295745300001 | Rights: | The Author(s) 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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s11120-024-01114-5.pdf | Early view | 5.74 MB | Adobe PDF | View/Open |
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