Ionic enhancement of silica surface nanowear in electrolyte solutions

Handle URI:
http://hdl.handle.net/10754/562415
Title:
Ionic enhancement of silica surface nanowear in electrolyte solutions
Authors:
Vakarelski, Ivan Uriev ( 0000-0001-9244-9160 ) ; Teramoto, Naofumi; McNamee, Cathy E.; Marston, Jeremy; Higashitani, Ko
Abstract:
The nanoscale wear and friction of silica and silicon nitride surfaces in aqueous electrolyte solutions were investigated by using sharp atomic force microscope (AFM) cantilever tips coated with silicon nitride. Measurements were carried out in aqueous solutions of varying pH and in monovalent and divalent cation chloride and nitrate solutions. The silica surface was shown to wear strongly in solutions of high pH (≈11.0), as expected, but the presence of simple cations, such as Cs+ and Ca2+, was shown to dramatically effect the wear depth and friction force for the silica surface. In the case of monovalent cations, their hydration enthalpies correlated well with the wear and friction. The weakest hydrated cation of Cs+ showed the most significant enhancement of wear and friction. In the case of divalent cations, a complex dependence on the type of cation was found, where the type of anion was also seen to play an important role. The CaCl2 solution showed the anomalous enhancement of wear depth and friction force, although the solution of Ca(NO3)2 did not. The present results obtained with an AFM tip were also compared with previous nanotribology studies of silica surfaces in electrolyte solutions, and possible molecular mechanisms as to why cations enhance the wear and friction were also discussed. © 2012 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Publisher:
American Chemical Society (ACS)
Journal:
Langmuir
Issue Date:
20-Nov-2012
DOI:
10.1021/la303223q
Type:
Article
ISSN:
07437463
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorVakarelski, Ivan Urieven
dc.contributor.authorTeramoto, Naofumien
dc.contributor.authorMcNamee, Cathy E.en
dc.contributor.authorMarston, Jeremyen
dc.contributor.authorHigashitani, Koen
dc.date.accessioned2015-08-03T10:37:22Zen
dc.date.available2015-08-03T10:37:22Zen
dc.date.issued2012-11-20en
dc.identifier.issn07437463en
dc.identifier.doi10.1021/la303223qen
dc.identifier.urihttp://hdl.handle.net/10754/562415en
dc.description.abstractThe nanoscale wear and friction of silica and silicon nitride surfaces in aqueous electrolyte solutions were investigated by using sharp atomic force microscope (AFM) cantilever tips coated with silicon nitride. Measurements were carried out in aqueous solutions of varying pH and in monovalent and divalent cation chloride and nitrate solutions. The silica surface was shown to wear strongly in solutions of high pH (≈11.0), as expected, but the presence of simple cations, such as Cs+ and Ca2+, was shown to dramatically effect the wear depth and friction force for the silica surface. In the case of monovalent cations, their hydration enthalpies correlated well with the wear and friction. The weakest hydrated cation of Cs+ showed the most significant enhancement of wear and friction. In the case of divalent cations, a complex dependence on the type of cation was found, where the type of anion was also seen to play an important role. The CaCl2 solution showed the anomalous enhancement of wear depth and friction force, although the solution of Ca(NO3)2 did not. The present results obtained with an AFM tip were also compared with previous nanotribology studies of silica surfaces in electrolyte solutions, and possible molecular mechanisms as to why cations enhance the wear and friction were also discussed. © 2012 American Chemical Society.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleIonic enhancement of silica surface nanowear in electrolyte solutionsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalLangmuiren
dc.contributor.institutionDepartment of Chemical Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japanen
dc.contributor.institutionShinshu University, Tokida 3-15-1, Ueda-shi, Nagano-ken 386-8567, Japanen
kaust.authorVakarelski, Ivan Urieven
kaust.authorMarston, Jeremyen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.