TY - GEN
T1 - Current Rectification Via Photosystem i Monolayers Induced by Their Orientation on Hydrophilic Self-Assembled Monolayers on Titanium Nitride
AU - Rojas, Jonathan
AU - Wang, Zhe
AU - Liu, Feng
AU - Fereiro, Jerry A.
AU - Chryssikos, Domenikos
AU - Dittrich, Thomas
AU - Leister, Dario
AU - Cahen, David
AU - Tornow, Marc
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85203173936&partnerID=8YFLogxK
U2 - 10.1109/NANO61778.2024.10628956
DO - 10.1109/NANO61778.2024.10628956
M3 - Conference contribution
AN - SCOPUS:85203173936
T3 - Proceedings of the IEEE Conference on Nanotechnology
SP - 266
EP - 271
BT - 2024 IEEE 24th International Conference on Nanotechnology, NANO 2024
PB - IEEE Computer Society
T2 - 24th IEEE International Conference on Nanotechnology, NANO 2024
Y2 - 8 July 2024 through 11 July 2024
ER -