Abstract
Photosystem I (PSI) is a photosynthetic protein which evolved to efficiently transfer electrons through the thylakoid membrane. This remarkable process attracted the attention of the biomolecular electronics community, which aims to study and understand the underlying electronic transport through these proteins by contacting ensembles of PSI with solid-state metallic contacts. This paper extends published work of immobilizing monolayers of PSI with a specific orientation, by using organophosphonate self-assembled molecules with hydrophilic heads on ultra-flat titanium nitride. Electrical measurements carried out with eutectic GaIn top contacts showed current rectification ratios of up to 200. The previously proposed rectification mechanism, relying on the protein's internal electric dipole, was inquired by measuring shifts in the work function. Our straightforward bottom-up fabrication method may allow for further experimental studies on PSI molecules, such as embedding them in solid-state, transparent top contact schemes for optoelectronic measurements.
Original language | English |
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Title of host publication | 2024 IEEE 24th International Conference on Nanotechnology, NANO 2024 |
Publisher | IEEE Computer Society |
Pages | 266-271 |
Number of pages | 6 |
ISBN (Electronic) | 9798350386240 |
DOIs | |
State | Published - 2024 |
Externally published | Yes |
Event | 24th IEEE International Conference on Nanotechnology, NANO 2024 - Gijon, Spain Duration: 8 Jul 2024 → 11 Jul 2024 |
Publication series
Name | Proceedings of the IEEE Conference on Nanotechnology |
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ISSN (Print) | 1944-9399 |
ISSN (Electronic) | 1944-9380 |
Conference
Conference | 24th IEEE International Conference on Nanotechnology, NANO 2024 |
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Country/Territory | Spain |
City | Gijon |
Period | 8/07/24 → 11/07/24 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.