Exploring Solid/Aqueous Interfaces with Ultradilute Electrokinetic Analysis of Liquid Microjets

Exploring Solid/Aqueous Interfaces with Ultradilute Electrokinetic Analysis of Liquid Microjets

We describe a novel method that exploits electrokinetic streaming current measurements for the study of ion-interface affinity. Through the use of liquid microjets and ultradilute solutions (

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Veröffentlicht in:Journal of physical chemistry. C 2013-06, Vol.117 (24), p.12702-12706
Hauptverfasser: Kelly, Daniel N, Lam, Royce K, Duffin, Andrew M, Saykally, Richard J
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Chemistry
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
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container_end_page 12706
container_issue 24
container_start_page 12702
container_title Journal of physical chemistry. C
container_volume 117
creator Kelly, Daniel N
Lam, Royce K
Duffin, Andrew M
Saykally, Richard J
description We describe a novel method that exploits electrokinetic streaming current measurements for the study of ion-interface affinity. Through the use of liquid microjets and ultradilute solutions (
doi_str_mv 10.1021/jp403583r
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Through the use of liquid microjets and ultradilute solutions (&lt;1 μM), we are able to overcome inherent difficulties in electrokinetic surface measurements engendered by changing double-layer thicknesses. Varying bulk KCl concentrations produce statistically significant changes in streaming current down at picomolar concentrations. Because the attending ion concentrations are below that from water autoionization, these data are compared with those from ultradilute HCl and KOH solutions assuming that the K+ and Cl– introduce no new counterions. This permits comparison of the individual effects of K+ and Cl– on the interface, evidencing a cooperative effect between these ions at silica surfaces. 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subjects Chemistry
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
title Exploring Solid/Aqueous Interfaces with Ultradilute Electrokinetic Analysis of Liquid Microjets
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