Issue 26, 2023

Cu-modified electrolyte-gated transistors based on reduced graphene oxide

Abstract

Electrolyte-gated transistors (EGTs) have attracted extensive attention due to their versatility and excellent performance in different fields of electronics. Here, we report on coplanar EGTs based on reduced graphene oxide (rGO), whose gates (flexible Au micro-electrodes) were modified by electrodeposition of either compact or porous Cu coatings (Cu-modified EGTs). The Cu coatings yielded a dramatic change in the minimum gate voltage spanning from −50 mV to −300 mV, which allowed extremely versatile tuning of the device signal. Furthermore, steady measurements led us to carry out prolonged measurements (>2 hours) under a constant bias in NaCl 0.1 M solution which was driven onto the EGTs by using homemade paper fluidics. Transient characterization studies pointed out a potentiometric sensitivity of around 1–3 mV with a signal-to-noise ratio (SNR) close to 5–10 for both electron and hole transport regimes. Since the response time of our Cu-modified EGTs was as low as 80 ms, we succeeded in monitoring emulated action potential (eAP) featuring a characteristic frequency equal to 0.1 Hz.

Graphical abstract: Cu-modified electrolyte-gated transistors based on reduced graphene oxide

Supplementary files

Article information

Article type
Paper
Submitted
16 Febr. 2023
Accepted
17 Maijs 2023
First published
12 Jūn. 2023
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. C, 2023,11, 8876-8884

Cu-modified electrolyte-gated transistors based on reduced graphene oxide

R. C. Hensel, N. Comisso, M. Musiani, F. Sedona, M. Sambi, A. Cester, N. Lago and S. Casalini, J. Mater. Chem. C, 2023, 11, 8876 DOI: 10.1039/D3TC00596H

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements