Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite
The resistance of bacteria toward antibacterial drugs is a rising problem. This threat is a major concern for space stations, where antibacterial surfaces would be ideal for materials which also need to be corrosion-resistant, hard and durable. Accordingly, the purpose of this work is to investigate...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2020-04-01
|
Series: | Materials & Design |
Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127520300319 |
id |
doaj-5ad909eb6a43483288a0ea7db19f91a8 |
---|---|
record_format |
Article |
spelling |
doaj-5ad909eb6a43483288a0ea7db19f91a82020-11-25T02:24:19ZengElsevierMaterials & Design0264-12752020-04-01189Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphiteAude Cumont0Ruoying Zhang1Louise Corscadden2Jingzhe Pan3Yuting Zheng4Haitao Ye5School of Engineering, University of Leicester, University Road, Leicester LE1 7RH, United KingdomSchool of Engineering, University of Leicester, University Road, Leicester LE1 7RH, United KingdomDepartment of Genetics and Genome Biology, University of Leicester, University Road, Leicester LE1 7RH, United KingdomSchool of Engineering, University of Leicester, University Road, Leicester LE1 7RH, United KingdomInstitute for Advanced Materials & Technology, University of Science and Technology Beijing, XueYuan Road 30, Haidian District, Beijing 100083, PR ChinaSchool of Engineering, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom; Corresponding author.The resistance of bacteria toward antibacterial drugs is a rising problem. This threat is a major concern for space stations, where antibacterial surfaces would be ideal for materials which also need to be corrosion-resistant, hard and durable. Accordingly, the purpose of this work is to investigate novel coatings that have superhydrophobic mushroom microstructures. The microstructures are made of nickel deposited on a substrate which is composed of a gold layer on top of the silicon. The microstructures were fabricated with UV-light assisted nanoimprint lithography. These superhydrophobic microstructures have a well-defined alignment and shape which does not have any detrimental effect on the plastic deformation of the substrate. Similar structures were coated with carbon by hot-filament chemical vapour deposition (HFCVD) for a duration varying from 30 min to 120 min. Raman spectroscopy shows that the coating is composed of graphite, due to nickel-induced graphitisation during the deposition process. The antibacterial evaluation shows the bare nickel microstructures offer no antibacterial properties despite their superhydrophobic behaviour. On the other hand, the graphitic coated microstructures demonstrate significant antibacterial properties. Especially, 30 min HFCVD coated samples was antibacterial against E. coli and S. aureus with Gram-dependence and dependent on the coating deposition duration. Keywords: Microstructures, Antibacterial, Graphite, Diamond, Coating, Superhydrophobichttp://www.sciencedirect.com/science/article/pii/S0264127520300319 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Aude Cumont Ruoying Zhang Louise Corscadden Jingzhe Pan Yuting Zheng Haitao Ye |
spellingShingle |
Aude Cumont Ruoying Zhang Louise Corscadden Jingzhe Pan Yuting Zheng Haitao Ye Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite Materials & Design |
author_facet |
Aude Cumont Ruoying Zhang Louise Corscadden Jingzhe Pan Yuting Zheng Haitao Ye |
author_sort |
Aude Cumont |
title |
Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite |
title_short |
Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite |
title_full |
Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite |
title_fullStr |
Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite |
title_full_unstemmed |
Characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and HFCVD graphite |
title_sort |
characterisation and antibacterial investigation of a novel coating consisting of mushroom microstructures and hfcvd graphite |
publisher |
Elsevier |
series |
Materials & Design |
issn |
0264-1275 |
publishDate |
2020-04-01 |
description |
The resistance of bacteria toward antibacterial drugs is a rising problem. This threat is a major concern for space stations, where antibacterial surfaces would be ideal for materials which also need to be corrosion-resistant, hard and durable. Accordingly, the purpose of this work is to investigate novel coatings that have superhydrophobic mushroom microstructures. The microstructures are made of nickel deposited on a substrate which is composed of a gold layer on top of the silicon. The microstructures were fabricated with UV-light assisted nanoimprint lithography. These superhydrophobic microstructures have a well-defined alignment and shape which does not have any detrimental effect on the plastic deformation of the substrate. Similar structures were coated with carbon by hot-filament chemical vapour deposition (HFCVD) for a duration varying from 30 min to 120 min. Raman spectroscopy shows that the coating is composed of graphite, due to nickel-induced graphitisation during the deposition process. The antibacterial evaluation shows the bare nickel microstructures offer no antibacterial properties despite their superhydrophobic behaviour. On the other hand, the graphitic coated microstructures demonstrate significant antibacterial properties. Especially, 30 min HFCVD coated samples was antibacterial against E. coli and S. aureus with Gram-dependence and dependent on the coating deposition duration. Keywords: Microstructures, Antibacterial, Graphite, Diamond, Coating, Superhydrophobic |
url |
http://www.sciencedirect.com/science/article/pii/S0264127520300319 |
work_keys_str_mv |
AT audecumont characterisationandantibacterialinvestigationofanovelcoatingconsistingofmushroommicrostructuresandhfcvdgraphite AT ruoyingzhang characterisationandantibacterialinvestigationofanovelcoatingconsistingofmushroommicrostructuresandhfcvdgraphite AT louisecorscadden characterisationandantibacterialinvestigationofanovelcoatingconsistingofmushroommicrostructuresandhfcvdgraphite AT jingzhepan characterisationandantibacterialinvestigationofanovelcoatingconsistingofmushroommicrostructuresandhfcvdgraphite AT yutingzheng characterisationandantibacterialinvestigationofanovelcoatingconsistingofmushroommicrostructuresandhfcvdgraphite AT haitaoye characterisationandantibacterialinvestigationofanovelcoatingconsistingofmushroommicrostructuresandhfcvdgraphite |
_version_ |
1724856326189744128 |