Single-cell multimodal imaging uncovers energy conversion pathways in biohybrids

Journal Article · Thu Jul 27 00:00:00 EDT 2023 · Nature Chemistry

DOI:https://doi.org/10.1038/s41557-023-01285-z· OSTI ID:1992654

Fu, Bing ^[1]; Mao, Xianwen ^[2]; Park, Youngchan ^[3]; Zhao, Zhiheng ^[3]; Yan, Tianlei ^[3]; Jung, Won ^[4]; Francis, Danielle H. ^[5]; Li, Wenjie ^[3]; Pian, Brooke ^[3]; Salimijazi, Farshid ^[3]; Suri, Mokshin ^[3]; Hanrath, Tobias ^[3]; Barstow, Buz ^[3]; Chen, Peng ^[3]

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1. City University of Hong Kong (China); Cornell University, Ithaca, NY (United States); Cornell University
2. National University of Singapore (Singapore); Cornell University, Ithaca, NY (United States)
3. Cornell University, Ithaca, NY (United States)
4. Harvard University, Cambridge, MA (United States); Cornell University, Ithaca, NY (United States)
5. Friends School of Baltimore, MD (United States); Cornell University, Ithaca, NY (United States)

Microbe–semiconductor biohybrids, which integrate microbial enzymatic synthesis with the light-harvesting capabilities of inorganic semiconductors, have emerged as promising solar-to-chemical conversion systems. Improving the electron transport at the nano–bio interface and inside cells is important for boosting conversion efficiencies, yet the underlying mechanism is challenging to study by bulk measurements owing to the heterogeneities of both constituents. Here we develop a generalizable, quantitative multimodal microscopy platform that combines multi-channel optical imaging and photocurrent mapping to probe such biohybrids down to single- to sub-cell/particle levels. We uncover and differentiate the critical roles of different hydrogenases in the lithoautotrophic bacterium Ralstonia eutropha for bioplastic formation, discover this bacterium’s surprisingly large nanoampere-level electron-uptake capability, and dissect the cross-membrane electron-transport pathways. Furthermore, this imaging platform, and the associated analytical framework, can uncover electron-transport mechanisms in various types of biohybrid, and potentially offers a means to use and engineer R. eutropha for efficient chemical production coupled with photocatalytic materials.

• Research Organization: Cornell University, Ithaca, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER)
• Grant/Contract Number: SC0020179
• OSTI ID: 1992654
• Alternate ID(s): OSTI ID: 1993706
• Journal Information: Nature Chemistry, Journal Name: Nature Chemistry Journal Issue: 10 Vol. 15; ISSN 1755-4330
• Publisher: Nature Publishing Group
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Biophysical chemistry
Electrochemistry
Imaging techniques
Nanobiotechnology