Rub-Resistant Antibacterial Surface Conversion Layer on Stainless Steel

Haiyue Huang; Olivia Willilams Barber; Zhilong Yu; Hun Park; Xiaobing Hu; Xinqi Chen; Chun Hu Chen; Erica M. Hartmann; Jiaxing Huang

doi:10.1002/admi.202200251

Rub-Resistant Antibacterial Surface Conversion Layer on Stainless Steel

Haiyue Huang, Olivia Willilams Barber, Zhilong Yu, Hun Park, Xiaobing Hu, Xinqi Chen, Chun Hu Chen, Erica M. Hartmann^*, Jiaxing Huang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Stainless steels are widely used in hospitals and public transportation vehicles as one of the most common touch surfaces. Retrofitting stainless steel surfaces with an antimicrobial layer can bring potential public health benefits by reducing the ability of inanimate objects, or fomites, to transmit infections. Here, a facile surface conversion reaction between stainless steel and a solution of KMnO₄ and CuSO₄ is reported, which leads to a conformal and robust oxyhydroxide layer. Microscopy observations show that the layer is amorphous, continuous, and pinhole-free with a thickness of only 10–15 nm. The coating adheres strongly to stainless steel and can resist rubbing in simulated friction tests, which is attributed to its intermixing with the substrate without forming a sharp interface. Cu ions incorporated into the surface layer can be released into water droplets deposited on the surface and induce antimicrobial activities against bacteria (Pseudomonas aeruginosa PA14) after 30 min of contact.

Original language	English (US)
Article number	2200251
Journal	Advanced Materials Interfaces
Volume	9
Issue number	11
DOIs	https://doi.org/10.1002/admi.202200251
State	Published - Apr 14 2022

Keywords

antimicrobial
coating
oxyhydroxide
stainless steel
surface conversion layer

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/admi.202200251

Cite this

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title = "Rub-Resistant Antibacterial Surface Conversion Layer on Stainless Steel",

abstract = "Stainless steels are widely used in hospitals and public transportation vehicles as one of the most common touch surfaces. Retrofitting stainless steel surfaces with an antimicrobial layer can bring potential public health benefits by reducing the ability of inanimate objects, or fomites, to transmit infections. Here, a facile surface conversion reaction between stainless steel and a solution of KMnO4 and CuSO4 is reported, which leads to a conformal and robust oxyhydroxide layer. Microscopy observations show that the layer is amorphous, continuous, and pinhole-free with a thickness of only 10–15 nm. The coating adheres strongly to stainless steel and can resist rubbing in simulated friction tests, which is attributed to its intermixing with the substrate without forming a sharp interface. Cu ions incorporated into the surface layer can be released into water droplets deposited on the surface and induce antimicrobial activities against bacteria (Pseudomonas aeruginosa PA14) after 30 min of contact.",

keywords = "antimicrobial, coating, oxyhydroxide, stainless steel, surface conversion layer",

author = "Haiyue Huang and Barber, {Olivia Willilams} and Zhilong Yu and Hun Park and Xiaobing Hu and Xinqi Chen and Chen, {Chun Hu} and Hartmann, {Erica M.} and Jiaxing Huang",

note = "Funding Information: The work was supported by Office of Naval Research (ONR N000142012685). This work made use of the SPID, Keck‐II, and EPIC facility of Northwestern University's NUANCE Center, which had received support from the SHyNE Resource (NSF ECCS‐2025633), the IIN, and Northwestern's MRSEC program (NSF DMR‐1720139). H.H. thanks the support from Northwestern University through a Ryan Fellowship and a Dissertation Fellowship. O.W.B. was supported in part by the Biotechnology Training Program. The authors thank Prof. Jane Wang and Dr. Pan He for help with the tribometer, and Po‐chun Liao for initial assistance. The authors further thank Dr. Egon Ozer for providing PA14. P. aeruginosa Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

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doi = "10.1002/admi.202200251",

language = "English (US)",

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AU - Huang, Haiyue

AU - Barber, Olivia Willilams

AU - Yu, Zhilong

AU - Park, Hun

AU - Hu, Xiaobing

AU - Chen, Xinqi

AU - Chen, Chun Hu

AU - Hartmann, Erica M.

AU - Huang, Jiaxing

N1 - Funding Information: The work was supported by Office of Naval Research (ONR N000142012685). This work made use of the SPID, Keck‐II, and EPIC facility of Northwestern University's NUANCE Center, which had received support from the SHyNE Resource (NSF ECCS‐2025633), the IIN, and Northwestern's MRSEC program (NSF DMR‐1720139). H.H. thanks the support from Northwestern University through a Ryan Fellowship and a Dissertation Fellowship. O.W.B. was supported in part by the Biotechnology Training Program. The authors thank Prof. Jane Wang and Dr. Pan He for help with the tribometer, and Po‐chun Liao for initial assistance. The authors further thank Dr. Egon Ozer for providing PA14. P. aeruginosa Publisher Copyright: © 2022 Wiley-VCH GmbH.

PY - 2022/4/14

Y1 - 2022/4/14

N2 - Stainless steels are widely used in hospitals and public transportation vehicles as one of the most common touch surfaces. Retrofitting stainless steel surfaces with an antimicrobial layer can bring potential public health benefits by reducing the ability of inanimate objects, or fomites, to transmit infections. Here, a facile surface conversion reaction between stainless steel and a solution of KMnO4 and CuSO4 is reported, which leads to a conformal and robust oxyhydroxide layer. Microscopy observations show that the layer is amorphous, continuous, and pinhole-free with a thickness of only 10–15 nm. The coating adheres strongly to stainless steel and can resist rubbing in simulated friction tests, which is attributed to its intermixing with the substrate without forming a sharp interface. Cu ions incorporated into the surface layer can be released into water droplets deposited on the surface and induce antimicrobial activities against bacteria (Pseudomonas aeruginosa PA14) after 30 min of contact.

AB - Stainless steels are widely used in hospitals and public transportation vehicles as one of the most common touch surfaces. Retrofitting stainless steel surfaces with an antimicrobial layer can bring potential public health benefits by reducing the ability of inanimate objects, or fomites, to transmit infections. Here, a facile surface conversion reaction between stainless steel and a solution of KMnO4 and CuSO4 is reported, which leads to a conformal and robust oxyhydroxide layer. Microscopy observations show that the layer is amorphous, continuous, and pinhole-free with a thickness of only 10–15 nm. The coating adheres strongly to stainless steel and can resist rubbing in simulated friction tests, which is attributed to its intermixing with the substrate without forming a sharp interface. Cu ions incorporated into the surface layer can be released into water droplets deposited on the surface and induce antimicrobial activities against bacteria (Pseudomonas aeruginosa PA14) after 30 min of contact.

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KW - surface conversion layer

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Rub-Resistant Antibacterial Surface Conversion Layer on Stainless Steel

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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