Přístupnostní navigace
E-přihláška
Vyhledávání Vyhledat Zavřít
Detail publikace
BARTOŠÍK, M. KORMOŠ, L. FLAJŠMAN, L. KALOUSEK, R. MACH, J. LIŠKOVÁ, Z. NEZVAL, D. ŠVARC, V. ŠAMOŘIL, T. ŠIKOLA, T.
Originální název
Nanometer-Sized Water Bridge and Pull-Off Force in AFM at Different Relative Humidities: Reproducibility Measurement and Model Based on Surface Tension Change
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
This article deals with the analysis of the relationship between the pull-off force measured by atomic force microscopy and the dimensions of water bridge condensed between a hydrophilic silicon oxide tip and a silicon oxide surface under ambient conditions. Our experiments have shown that the pull-off force increases linearly with the radius of the tip and nonmonotonically with the relative humidity (RH). The latter dependence generally consists of an initial constant part changing to a convex–concave-like increase of the pull-off force and finally followed by a concave-like decrease of this force. The reproducibility tests have demonstrated that the precision limits have to be taken into account for comparing these measurements carried out under atmospheric conditions. The results were fitted by a classical thermodynamic model based on water-bridge envelope calculations using the numerical solution of the Kelvin equation in the form of axisymmetric differential equations and consequent calculation of adhesive forces. To describe the measured data more precisely, a decrease of the water surface tension for low RH was incorporated into the calculation. Such a decrease can be expected as a consequence of the high surface curvature in the nanometer-sized water bridge between the tip and the surface.
Klíčová slova
AFM; pull-off force; SiO2; relative humidity; capillary condensation; surface tension
Autoři
BARTOŠÍK, M.; KORMOŠ, L.; FLAJŠMAN, L.; KALOUSEK, R.; MACH, J.; LIŠKOVÁ, Z.; NEZVAL, D.; ŠVARC, V.; ŠAMOŘIL, T.; ŠIKOLA, T.
Vydáno
11. 1. 2017
ISSN
1520-6106
Periodikum
JOURNAL OF PHYSICAL CHEMISTRY B
Ročník
121
Číslo
3
Stát
Spojené státy americké
Strany od
610
Strany do
619
Strany počet
10
BibTex
@article{BUT132473, author="Miroslav {Bartošík} and Lukáš {Kormoš} and Lukáš {Flajšman} and Radek {Kalousek} and Jindřich {Mach} and Zuzana {Lišková} and David {Nezval} and Vojtěch {Švarc} and Tomáš {Šamořil} and Tomáš {Šikola}", title="Nanometer-Sized Water Bridge and Pull-Off Force in AFM at Different Relative Humidities: Reproducibility Measurement and Model Based on Surface Tension Change", journal="JOURNAL OF PHYSICAL CHEMISTRY B", year="2017", volume="121", number="3", pages="610--619", doi="10.1021/acs.jpcb.6b11108", issn="1520-6106" }