High sensitivity Love-mode liquid density sensors

Turton, A. C., Bhattacharyya, D. and Wood, David (2005) High sensitivity Love-mode liquid density sensors. Sensors and Actuators A: Physical, 123-24. pp. 267-273. ISSN 0924-4247

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Official URL: https://doi.org/10.1016/j.sna.2005.02.010


An experimental study into Love-mode liquid sensors using polyimide for a waveguide layer has been carried out. Love devices were built on Y-ST quartz with 40 μm wavelength inter-digitated transducers operating up to 124.7 MHz, and polyimide layers between 0.65 and 1.5 μm thick. The optimum polyimide thickness was 0.85 μm exhibiting a minimum insertion loss of 16 dB. Surface corrugations from 2.5 μm wide and 0.5 μm deep were etched in the polyimide to discriminate the liquid density from the square root of the density-viscosity product. A maximum sensitivity of up to 0.36 μg cm-3 Hz-1 has been obtained, a higher value than found in most other studies.

Item Type: Article
Uncontrolled Keywords: Love, SAW, Polyimide, Liquid density sensor
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Becky Skoyles
Date Deposited: 29 Mar 2018 14:35
Last Modified: 11 Oct 2019 21:18
URI: http://nrl.northumbria.ac.uk/id/eprint/33891

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