Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride

Domenikos Chryssikos; Julian M Dlugosch; Jerry A Fereiro; Takuya Kamiyama; Mordechai Sheves; David Cahen; Marc Tornow

doi:10.1109/NANO51122.2021.9514351

Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride

Domenikos Chryssikos, Julian M Dlugosch, Jerry A Fereiro, Takuya Kamiyama, Mordechai Sheves, David Cahen, Marc Tornow

Department of Molecular Chemistry and Materials Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Understanding the charge transport properties of proteins at the molecular scale is crucial for the development of novel bioelectronic devices. In this contribution, we report on the preparation and electrical characterization of thin films of bacteriorhodopsin grafted on the surface of titanium nitride via aminophosphonate linkers. Thickness analysis using atomic force microscopy revealed a protein film thickness of 8.2±1.5 nm, indicating the formation of a protein bilayer. Electrical measurements were carried out in the dry state, in a vertical arrangement with a eutectic gallium-indium (EGaIn) or an evaporated Ti/Au top contact. DC current-voltage measurements yielded comparable effective tunneling decay constants β∼0.13A-1 for the EGaIn top contact and ∼0.15A-1 for the Ti/Au top contact. The results presented herein may establish a novel platform for studying charge transport via protein molecules in a solid-state device configuration.

Original language	English
Title of host publication	NANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings
Pages	389-392
Number of pages	4
ISBN (Electronic)	9781665441568
DOIs	https://doi.org/10.1109/NANO51122.2021.9514351
Publication status	Published - 26 Aug 2021
Event	21st IEEE International Conference on Nanotechnology, NANO 2021 - Virtual, Montreal, Canada Duration: 28 Jul 2021 → 30 Jul 2021

Publication series

Series	Ieee International Conference On Nanotechnology
Number	21th
Volume	2021

Conference

Conference	21st IEEE International Conference on Nanotechnology, NANO 2021
Country/Territory	Canada
City	Virtual, Montreal
Period	28/7/21 → 30/7/21

Funding

Research was funded by the Deutsche Forschungsgemeinschaft (TO266/10-1). We thank R. Mittermeier for technical support, E. Hacker, M. Heigl, D. Linke, and D. Reiser (Fraunhofer EMFT, Munich) for providing the TiN substrates, and E. Kounoupioti for figure editing. We acknowledge access to the XPS system of the Walter Schottky Institute, Garching, Germany (Prof. M. Stutzmann, Prof. I. Sharp).

All Science Journal Classification (ASJC) codes

Bioengineering
Electrical and Electronic Engineering
Materials Chemistry
Condensed Matter Physics

Access to Document

10.1109/NANO51122.2021.9514351

Cite this

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title = "Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride",

abstract = "Understanding the charge transport properties of proteins at the molecular scale is crucial for the development of novel bioelectronic devices. In this contribution, we report on the preparation and electrical characterization of thin films of bacteriorhodopsin grafted on the surface of titanium nitride via aminophosphonate linkers. Thickness analysis using atomic force microscopy revealed a protein film thickness of 8.2±1.5 nm, indicating the formation of a protein bilayer. Electrical measurements were carried out in the dry state, in a vertical arrangement with a eutectic gallium-indium (EGaIn) or an evaporated Ti/Au top contact. DC current-voltage measurements yielded comparable effective tunneling decay constants β∼0.13A-1 for the EGaIn top contact and ∼0.15A-1 for the Ti/Au top contact. The results presented herein may establish a novel platform for studying charge transport via protein molecules in a solid-state device configuration. ",

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Chryssikos, D, Dlugosch, JM, Fereiro, JA, Kamiyama, T, Sheves, M , Cahen, D & Tornow, M 2021, Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride. in NANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings. Ieee International Conference On Nanotechnology, no. 21th, vol. 2021, pp. 389-392, 21st IEEE International Conference on Nanotechnology, NANO 2021, Virtual, Montreal, Canada, 28/7/21. https://doi.org/10.1109/NANO51122.2021.9514351

Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride. / Chryssikos, Domenikos; Dlugosch, Julian M; Fereiro, Jerry A et al.
NANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings. 2021. p. 389-392 (Ieee International Conference On Nanotechnology; No. 21th, Vol. 2021).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride

AU - Chryssikos, Domenikos

AU - Dlugosch, Julian M

AU - Fereiro, Jerry A

AU - Kamiyama, Takuya

AU - Sheves, Mordechai

AU - Cahen, David

AU - Tornow, Marc

PY - 2021/8/26

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N2 - Understanding the charge transport properties of proteins at the molecular scale is crucial for the development of novel bioelectronic devices. In this contribution, we report on the preparation and electrical characterization of thin films of bacteriorhodopsin grafted on the surface of titanium nitride via aminophosphonate linkers. Thickness analysis using atomic force microscopy revealed a protein film thickness of 8.2±1.5 nm, indicating the formation of a protein bilayer. Electrical measurements were carried out in the dry state, in a vertical arrangement with a eutectic gallium-indium (EGaIn) or an evaporated Ti/Au top contact. DC current-voltage measurements yielded comparable effective tunneling decay constants β∼0.13A-1 for the EGaIn top contact and ∼0.15A-1 for the Ti/Au top contact. The results presented herein may establish a novel platform for studying charge transport via protein molecules in a solid-state device configuration.

AB - Understanding the charge transport properties of proteins at the molecular scale is crucial for the development of novel bioelectronic devices. In this contribution, we report on the preparation and electrical characterization of thin films of bacteriorhodopsin grafted on the surface of titanium nitride via aminophosphonate linkers. Thickness analysis using atomic force microscopy revealed a protein film thickness of 8.2±1.5 nm, indicating the formation of a protein bilayer. Electrical measurements were carried out in the dry state, in a vertical arrangement with a eutectic gallium-indium (EGaIn) or an evaporated Ti/Au top contact. DC current-voltage measurements yielded comparable effective tunneling decay constants β∼0.13A-1 for the EGaIn top contact and ∼0.15A-1 for the Ti/Au top contact. The results presented herein may establish a novel platform for studying charge transport via protein molecules in a solid-state device configuration.

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M3 - Conference contribution

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BT - NANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings

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Chryssikos D, Dlugosch JM, Fereiro JA, Kamiyama T, Sheves M , Cahen D et al. Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride. In NANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings. 2021. p. 389-392. (Ieee International Conference On Nanotechnology; No. 21th, Vol. 2021). doi: 10.1109/NANO51122.2021.9514351

Electronic Transport through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride

Abstract

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