Time dependence of forces between mica surfaces in water and its relation to the release of surface ions

Uri Raviv; Pierre Laurat; Jacob Klein

doi:10.1063/1.1447911

Time dependence of forces between mica surfaces in water and its relation to the release of surface ions

Uri Raviv
, Pierre Laurat
, Jacob Klein^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

69 Scopus citations

Abstract

An investigation of the time-dependent behavior of the normal forces between two smooth mica surfaces immersed in salt-free water was presented, using a surface force balance (SFB). An equilibrium surface-charge density σ = σ₀ was indicated by a long-ranged repulsion on initial approach to adhesive contact. The results showed that subsequent force measurements at times τ following separation of the surfaces revealed drop in σ, followed by contact and separation, but then relaxed back to σ₀ with a characteristic time τ_r = 11 ± 2 minutes.

Original language	English
Pages (from-to)	5167-5172
Number of pages	6
Journal	Journal of Chemical Physics
Volume	116
Issue number	12
DOIs	https://doi.org/10.1063/1.1447911
State	Published - 22 Mar 2002
Externally published	Yes

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10.1063/1.1447911

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title = "Time dependence of forces between mica surfaces in water and its relation to the release of surface ions",

abstract = "An investigation of the time-dependent behavior of the normal forces between two smooth mica surfaces immersed in salt-free water was presented, using a surface force balance (SFB). An equilibrium surface-charge density σ = σ0 was indicated by a long-ranged repulsion on initial approach to adhesive contact. The results showed that subsequent force measurements at times τ following separation of the surfaces revealed drop in σ, followed by contact and separation, but then relaxed back to σ0 with a characteristic time τr = 11 ± 2 minutes.",

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AU - Raviv, Uri

AU - Laurat, Pierre

AU - Klein, Jacob

PY - 2002/3/22

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N2 - An investigation of the time-dependent behavior of the normal forces between two smooth mica surfaces immersed in salt-free water was presented, using a surface force balance (SFB). An equilibrium surface-charge density σ = σ0 was indicated by a long-ranged repulsion on initial approach to adhesive contact. The results showed that subsequent force measurements at times τ following separation of the surfaces revealed drop in σ, followed by contact and separation, but then relaxed back to σ0 with a characteristic time τr = 11 ± 2 minutes.

AB - An investigation of the time-dependent behavior of the normal forces between two smooth mica surfaces immersed in salt-free water was presented, using a surface force balance (SFB). An equilibrium surface-charge density σ = σ0 was indicated by a long-ranged repulsion on initial approach to adhesive contact. The results showed that subsequent force measurements at times τ following separation of the surfaces revealed drop in σ, followed by contact and separation, but then relaxed back to σ0 with a characteristic time τr = 11 ± 2 minutes.

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Time dependence of forces between mica surfaces in water and its relation to the release of surface ions

Abstract

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