CUED Publications database

An electrokinetic sensor for studying immersed surfaces, using focused ultrasound

Glauser, AR and Robertson, PA and Lowe, CR (2001) An electrokinetic sensor for studying immersed surfaces, using focused ultrasound. Sensors and Actuators, B: Chemical, 80. pp. 68-82. ISSN 0925-4005

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Abstract

A novel method for obtaining information on the charge density of an immersed surface is presented. The technique uses focused ultrasound to excite oscillatory fluid motion in the plane of the solid-liquid interface, over a localised area. The displacement current (resulting from the motion of fluid-borne ions in the outer double-layer) is detected by electrodes in the liquid. The method is demonstrated as a means for monitoring protein adsorption, and for monitoring interactions between two different proteins. A second electrokinetic effect at the interface is identified, isolated from the first, and shown to provide additional information on the compressibility and charge density of the double-layer. © 2001 Elsevier Science B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Double-layer Electroacoustic Electrokinetic Interface Sensing Surface Ultrasound Zeta potential
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:09
Last Modified: 26 Nov 2014 19:06
DOI: 10.1016/S0925-4005(01)00888-7