Issue 10, 2024

Antimicrobial coatings based on amine-terminated graphene oxide and Nafion with remarkable thermal resistance

Abstract

We present a novel type of layer-by-layer (LbL) waterborne coating based on Nafion and amine-terminated graphene oxide (GO–NH2) that inhibits the growth of Escherichia coli and Staphylococcus aureus by more than 99% and this performance is not compromised upon extensive thermal annealing at 200 °C. Quartz crystal microbalance (QCM) sensorgrams allow the real time monitoring of the build-up of the LbL assemblies, a process that relies on the strong electrostatic interactions between Nafion (pH = 2.7, ζ = −54.8 mV) and GO–NH2 (pH = 2, ζ = 26.7 mV). Atomic force microscopy (AFM), contact angle and zeta potential measurements were used to characterise the multilayer assemblies. We demonstrate here that Nafion/GO–NH2 advanced coatings can offer drug-free and long-lasting solutions to microbial colonization and can withstand dry heat sterilization, without any decline in their performance.

Graphical abstract: Antimicrobial coatings based on amine-terminated graphene oxide and Nafion with remarkable thermal resistance

Article information

Article type
Paper
Submitted
28 dec 2023
Accepted
04 mar 2024
First published
15 mar 2024
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2024,6, 2594-2601

Antimicrobial coatings based on amine-terminated graphene oxide and Nafion with remarkable thermal resistance

M. S. Beg, E. N. Gibbons, S. Gavalas, M. A. Holden, M. Krysmann and A. Kelarakis, Nanoscale Adv., 2024, 6, 2594 DOI: 10.1039/D3NA01154B

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