Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure

We present an alternative route to enhance antibacterial activity of polymer matrix nanocomposites that incorporate biocidal nanomaterials, using open-air atmospheric pressure plasma etching. We applied He/O2 discharges to rapidly remove the upper organic layers of ZnO -PMMA nanocomposite coatings,...

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Autores principales:	P. Dimitrakellis, G.D. Kaprou, G. Papavieros, D.C. Mastellos, V. Constantoudis, A. Tserepi, E. Gogolides
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Atmospheric plasma etching Nanotexturing Nanocomposites Zinc oxide Antibacterial Antimicrobial Electronics TK7800-8360 Technology (General) T1-995
Acceso en línea:	https://doaj.org/article/97e7525375b648dbaa8c411ce9ebc95b
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spelling	oai:doaj.org-article:97e7525375b648dbaa8c411ce9ebc95b2021-11-28T04:37:34ZEnhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure2590-007210.1016/j.mne.2021.100098https://doaj.org/article/97e7525375b648dbaa8c411ce9ebc95b2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2590007221000198https://doaj.org/toc/2590-0072We present an alternative route to enhance antibacterial activity of polymer matrix nanocomposites that incorporate biocidal nanomaterials, using open-air atmospheric pressure plasma etching. We applied He/O2 discharges to rapidly remove the upper organic layers of ZnO -PMMA nanocomposite coatings, thus increasing the surface concentration of ZnO. To quantify the ZnO concentration from SEM images on the surface of the nanocomposite material, we developed and employed a new nanometrology method based on local variances of pixel luminosities and found a rapid increase of surface fraction up to 30% for the first 2 min of plasma treatment. Plasma etching resulted in enhanced antibacterial activity against Gram-negative E. coli cells after 4 h incubation under dynamic conditions. The results revealed an almost exponential drop of bacterial concentration with ZnO surface fraction, thus confirming the direct correlation of antibacterial activity with the interfacial area of the biocidal nanomaterial.P. DimitrakellisG.D. KaprouG. PapavierosD.C. MastellosV. ConstantoudisA. TserepiE. GogolidesElsevierarticleAtmospheric plasma etchingNanotexturingNanocompositesZinc oxideAntibacterialAntimicrobialElectronicsTK7800-8360Technology (General)T1-995ENMicro and Nano Engineering, Vol 13, Iss , Pp 100098- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Atmospheric plasma etching Nanotexturing Nanocomposites Zinc oxide Antibacterial Antimicrobial Electronics TK7800-8360 Technology (General) T1-995
spellingShingle	Atmospheric plasma etching Nanotexturing Nanocomposites Zinc oxide Antibacterial Antimicrobial Electronics TK7800-8360 Technology (General) T1-995 P. Dimitrakellis G.D. Kaprou G. Papavieros D.C. Mastellos V. Constantoudis A. Tserepi E. Gogolides Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure
description	We present an alternative route to enhance antibacterial activity of polymer matrix nanocomposites that incorporate biocidal nanomaterials, using open-air atmospheric pressure plasma etching. We applied He/O2 discharges to rapidly remove the upper organic layers of ZnO -PMMA nanocomposite coatings, thus increasing the surface concentration of ZnO. To quantify the ZnO concentration from SEM images on the surface of the nanocomposite material, we developed and employed a new nanometrology method based on local variances of pixel luminosities and found a rapid increase of surface fraction up to 30% for the first 2 min of plasma treatment. Plasma etching resulted in enhanced antibacterial activity against Gram-negative E. coli cells after 4 h incubation under dynamic conditions. The results revealed an almost exponential drop of bacterial concentration with ZnO surface fraction, thus confirming the direct correlation of antibacterial activity with the interfacial area of the biocidal nanomaterial.
format	article
author	P. Dimitrakellis G.D. Kaprou G. Papavieros D.C. Mastellos V. Constantoudis A. Tserepi E. Gogolides
author_facet	P. Dimitrakellis G.D. Kaprou G. Papavieros D.C. Mastellos V. Constantoudis A. Tserepi E. Gogolides
author_sort	P. Dimitrakellis
title	Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure
title_short	Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure
title_full	Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure
title_fullStr	Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure
title_full_unstemmed	Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure
title_sort	enhanced antibacterial activity of zno-pmma nanocomposites by selective plasma etching in atmospheric pressure
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/97e7525375b648dbaa8c411ce9ebc95b
work_keys_str_mv	AT pdimitrakellis enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure AT gdkaprou enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure AT gpapavieros enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure AT dcmastellos enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure AT vconstantoudis enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure AT atserepi enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure AT egogolides enhancedantibacterialactivityofznopmmananocompositesbyselectiveplasmaetchinginatmosphericpressure
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Enhanced antibacterial activity of ZnO-PMMA nanocomposites by selective plasma etching in atmospheric pressure

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