Current Rectification Via Photosystem i Monolayers Induced by Their Orientation on Hydrophilic Self-Assembled Monolayers on Titanium Nitride

Jonathan Rojas, Zhe Wang, Feng Liu, Jerry A. Fereiro, Domenikos Chryssikos, Thomas Dittrich, Dario Leister, David Cahen, Marc Tornow

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

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.

OriginalspracheEnglisch
Titel2024 IEEE 24th International Conference on Nanotechnology, NANO 2024
Herausgeber (Verlag)IEEE Computer Society
Seiten266-271
Seitenumfang6
ISBN (elektronisch)9798350386240
DOIs
PublikationsstatusVeröffentlicht - 2024
Veranstaltung24th IEEE International Conference on Nanotechnology, NANO 2024 - Gijon, Spanien
Dauer: 8 Juli 202411 Juli 2024

Publikationsreihe

NameProceedings of the IEEE Conference on Nanotechnology
ISSN (Print)1944-9399
ISSN (elektronisch)1944-9380

Konferenz

Konferenz24th IEEE International Conference on Nanotechnology, NANO 2024
Land/GebietSpanien
OrtGijon
Zeitraum8/07/2411/07/24

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