Journal
NANO LETTERS
Volume 10, Issue 4, Pages 1137-1143Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl903141j
Keywords
Bioelectricity; photosynthesis; nanoelectrode; atomic force microscope
Categories
Funding
- Global Climate and Energy Project at Stanford University
- Yonsei University
- National Research Foundation of Korea [과C6A1606] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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There are numerous sources of bioenergy that are generated by photosynthetic processes. for example, lipids, alcohols, hydrogen, and polysaccharides. However, generally only a small fraction of solar energy absorbed by photosynthetic organisms is converted to a form of energy that can be readily exploited. To more efficiently use the solar energy harvested by photosynthetic organisms, we evaluated the feasibility of generating bioelectricity by directly extracting electrons from the photosynthetic electron transport chain before they are used to fix CO, into sugars and polysaccharides. From a living algal cell, Chlamydomonas reinhardtii, photosynthetic electrons (1.2 pA at 6000 mA/m(2)) were directly extracted without a mediator electron carrier by inserting a nanoelectrode into the algal chloroplast and applying an overvoltage. This result may represent an initial step in generating high efficiency bioelectricity by directly harvesting high energy photosynthetic electrons.
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