English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/187218
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Estimation of interaction energy and contact stiffness in atomic-scale sliding on a model sodium chloride surface in ethanol

AuthorsAgmon, Liron; Shahar, Itai; Yosufov, Danny; Pimentel, Carlos ; Pina, Carlos M. ; Gnecco, Enrico; Berkovich, Ronen
Issue Date16-Mar-2018
PublisherSpringer Nature
CitationScientific Reports 8: 4681 (2018)
AbstractFriction force microscopy (FFM) in aqueous environments has recently proven to be a very effective method for lattice-resolution imaging of crystal surfaces. Here we demonstrate the use of ethanol for similar measurements on water-soluble materials. Lattice resolved frictional stick-slip traces of a cleaved NaCl(100) surface submerged in ethanol are compared with previous obtained FFM results in ultrahigh vacuum (UHV). We use the Prandtl-Tomlinson framework to estimate the amplitude of the corrugation potential and the contact stiffness. The surface potential amplitude scales with the applied normal loads are in good agreement with data obtained for NaCl measured under UHV conditions, but demonstrates deviations from the ideal periodic potential given by the Prandtl-Tomlinson model. An additional finding is that the use of ethanol allows us to explore higher load ranges without detectable evidence of surface wear. The contact stiffness does not vary significantly with the normal load up to 38 nN, while above it a sudden increase by almost one order of magnitude was observed. Comparing this to previous results suggests that considerable atom rearrangements may occur in the contact region, although the (100) surface structure is preserved by ethanol-assisted diffusion of Na and Cl ions.
Publisher version (URL)https://doi.org/10.1038/s41598-018-22847-z
URIhttp://hdl.handle.net/10261/187218
DOI10.1038/s41598-018-22847-z
Appears in Collections:(IGEO) Artículos
Files in This Item:
File Description SizeFormat 
Estimation of interaction energy_Agmon.pdf2,38 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.