Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation

Phong A Tran,1,2 Thomas J Webster31Department of Chemical and Biomolecular Engineering, University of Melbourne, Melbourne, VIC, Australia; 2The Particulate Fluid Processing Centre, University of Melbourne, Melbourne, VIC, Australia; 3Department of Chemical Engineering and Program in Bioengineering,...

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Autores principales:	Tran PA, Webster TJ
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2013
Materias:	Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/3366b27b790d45d9bc747f944477e8f0
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spelling	oai:doaj.org-article:3366b27b790d45d9bc747f944477e8f02021-12-02T07:22:58ZUnderstanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation1176-91141178-2013https://doaj.org/article/3366b27b790d45d9bc747f944477e8f02013-05-01T00:00:00Zhttp://www.dovepress.com/understanding-the-wetting-properties-of-nanostructured-selenium-coatin-a13098https://doaj.org/toc/1176-9114https://doaj.org/toc/1178-2013Phong A Tran,1,2 Thomas J Webster31Department of Chemical and Biomolecular Engineering, University of Melbourne, Melbourne, VIC, Australia; 2The Particulate Fluid Processing Centre, University of Melbourne, Melbourne, VIC, Australia; 3Department of Chemical Engineering and Program in Bioengineering, Northeastern University, Boston, MA, USAAbstract: Wetting properties of biomaterials, in particular nanomaterials, play an important role, as these influence interactions with biological elements, such as proteins, bacteria, and cells. In this study, the wetting phenomenon of titanium substrates coated with selenium nanoparticles was studied using experimental and mathematical modeling tools. Importantly, these selenium-coated titanium substrates were previously reported to increase select protein adsorption (such as vitronectin and fibronectin), to decrease bacteria growth, and increase bone cell growth. Increased selenium nanoparticle coating density resulted in higher contact angles but remained within the hydrophilic regime. This trend was found in disagreement with the Wenzel model, which is widely used to understand the wetting properties of rough surfaces. The trend also did not fit well with the Cassie–Baxter model, which was developed to understand the wetting properties of composite surfaces. A modified wetting model was thus proposed in this study, to understand the contributing factors of material properties to the hydrophilicity/hydrophobicity of these nanostructured selenium-coated surfaces. The analysis and model created in this study can be useful in designing and/or understanding the wetting behavior of numerous biomedical materials and in turn, biological events (such as protein adsorption as well as bacteria and mammalian cell functions).Keywords: hydrophilicity, hydrophobicity, Wenzel model, Cassie–Baxter model, free energy, implant material, proteins, cells, bacteriaTran PAWebster TJDove Medical PressarticleMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol 2013, Iss default, Pp 2001-2009 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine (General) R5-920
spellingShingle	Medicine (General) R5-920 Tran PA Webster TJ Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
description	Phong A Tran,1,2 Thomas J Webster31Department of Chemical and Biomolecular Engineering, University of Melbourne, Melbourne, VIC, Australia; 2The Particulate Fluid Processing Centre, University of Melbourne, Melbourne, VIC, Australia; 3Department of Chemical Engineering and Program in Bioengineering, Northeastern University, Boston, MA, USAAbstract: Wetting properties of biomaterials, in particular nanomaterials, play an important role, as these influence interactions with biological elements, such as proteins, bacteria, and cells. In this study, the wetting phenomenon of titanium substrates coated with selenium nanoparticles was studied using experimental and mathematical modeling tools. Importantly, these selenium-coated titanium substrates were previously reported to increase select protein adsorption (such as vitronectin and fibronectin), to decrease bacteria growth, and increase bone cell growth. Increased selenium nanoparticle coating density resulted in higher contact angles but remained within the hydrophilic regime. This trend was found in disagreement with the Wenzel model, which is widely used to understand the wetting properties of rough surfaces. The trend also did not fit well with the Cassie–Baxter model, which was developed to understand the wetting properties of composite surfaces. A modified wetting model was thus proposed in this study, to understand the contributing factors of material properties to the hydrophilicity/hydrophobicity of these nanostructured selenium-coated surfaces. The analysis and model created in this study can be useful in designing and/or understanding the wetting behavior of numerous biomedical materials and in turn, biological events (such as protein adsorption as well as bacteria and mammalian cell functions).Keywords: hydrophilicity, hydrophobicity, Wenzel model, Cassie–Baxter model, free energy, implant material, proteins, cells, bacteria
format	article
author	Tran PA Webster TJ
author_facet	Tran PA Webster TJ
author_sort	Tran PA
title	Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
title_short	Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
title_full	Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
title_fullStr	Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
title_full_unstemmed	Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
title_sort	understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation
publisher	Dove Medical Press
publishDate	2013
url	https://doaj.org/article/3366b27b790d45d9bc747f944477e8f0
work_keys_str_mv	AT tranpa understandingthewettingpropertiesofnanostructuredseleniumcoatingstheroleofnanostructuredsurfaceroughnessandairpocketformation AT webstertj understandingthewettingpropertiesofnanostructuredseleniumcoatingstheroleofnanostructuredsurfaceroughnessandairpocketformation
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Understanding the wetting properties of nanostructured selenium coatings: the role of nanostructured surface roughness and air-pocket formation

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