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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

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 ß~ 0.13 A-1 for the EGaIn top contact and ~ 0.15 A-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 languageEnglish
Title of host publicationNANO 2021 - 21st IEEE International Conference on Nanotechnology, Proceedings
PublisherIEEE Computer Society
Pages389-392
Number of pages4
ISBN (Electronic)9781665441568
DOIs
StatePublished - 28 Jul 2021
Externally publishedYes
Event21st IEEE International Conference on Nanotechnology, NANO 2021 - Virtual, Montreal, Canada
Duration: 28 Jul 202130 Jul 2021

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
Volume2021-July
ISSN (Print)1944-9399
ISSN (Electronic)1944-9380

Conference

Conference21st IEEE International Conference on Nanotechnology, NANO 2021
Country/TerritoryCanada
CityVirtual, Montreal
Period28/07/2130/07/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

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