Extracting Photosynthetic Electrons from Thylakoids on Micro Pillar Electrode
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Extraction of photosynthetic currents from thylakoids was studied using micro pillar structured electrode. Thylakoids were isolated from spinach leaves, and the size and shape of thylakoids were estimated from scanning electron microscopy images. Based on the geometry information of thylakoids, micro pillar shaped electrode was designed and fabricated using metal-assisted chemical etching of silicon wafers. Influence of photovoltaic effect on the silicon-based micro pillar electrode was confirmed to be negligible. Photosynthetic currents were measured in a three-electrode setup with an electron mediator, potassium ferricyanide. Photosynthetic currents from micro pillar electrodes were enhanced compared with the currents from flat electrodes. This indicates the significance of the enhanced contact between thylakoids and an electrode for harvesting photosynthetic electrons.
KeywordsPhotosynthesis Thylakoids Photosynthetic electrons Micro pillars Metal-assisted chemical etching
- 6.Suh, Y. D., Hong, S., Kim, G., Hwang, K.-I., Choi, J.-H., et al., “Selective Electro—Thermal Growth of Zinc Oxide Nanowire on Photolithographically Patterned Electrode for Microsensor Applications,” International Journal of Precision Engineering and Manufacturing-Green Technology, Vol. 3, No. 2, pp. 173–177, 2016.CrossRefGoogle Scholar
- 9.Hasan, K., Dilgin, Y., Emek, S. C., Tavahodi, M., Åkerlund, H. E., et al., “Photoelectrochemical Communication between Thylakoid Membranes and Gold Electrodes through Different Quinone Derivatives,” Chem Electro Chem, Vol. 1, No. 1, pp. 131–139, 2014.Google Scholar
- 14.Austin, J. R. and Staehelin, L. A., “Three-Dimensional Architecture of Grana and Stroma Thylakoids of Higher Plants as Determined by Electron Tomography,” Plant Physiology, Paper No. 110170647, 2011.Google Scholar
- 18.Kirchhofer, N. D., Rasmussen, M. A., Dahlquist, F. W., Minteer, S. D., and Bazan, G. C., “The Photobioelectrochemical Activity of Thylakoid Bioanodes is Increased via Photocurrent Generation and Improved Contacts by Membrane-Intercalating Conjugated Oligoelectrolytes,” Energy & Environmental Science, Vol. 8, No. 9, pp. 2698–2706, 2015.CrossRefGoogle Scholar