Laser vibrometry characterisation of a microfluidic lab-on-a-chip device: a preliminary investigation

Fury, C, Gélat, P N, Jones, P H and Memoli, G (2014) Laser vibrometry characterisation of a microfluidic lab-on-a-chip device: a preliminary investigation. Journal of Physics: Conference Series, 498 (1). 012002. ISSN 1742-6588

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Abstract

Since their original inception as ultrasound contrast agents, potential applications of microbubbles have evolved to encompass molecular imaging and targeted drug delivery. As these areas develop, so does the need to understand the mechanisms behind the interaction of microbubbles both with biological tissue and with other microbubbles. There is therefore a metrological requirement to develop a controlled environment in which to study these processes. Presented here is the design and characterisation of such a system, which consists of a microfluidic chip, specifically developed for manipulating microbubbles using both optical and acoustic trapping. A laser vibrometer is used to observe the coupling of acoustic energy into the chip from a piezoelectric transducer bonded to the surface. Measurement of the velocity of surface waves on the chip is investigated as a potential method for inferring the nature of the acoustic fields excited within the liquid medium of the device. Comparison of measured surface wavelengths with wave types suggests the observation of anti-symmetric Lamb or Love-Kirchhoff waves. Further visual confirmation of the acoustic fields through bubble aggregation highlights differences between the model and experimental results in predicting the position of acoustic pressure nodes in relation to excitation frequency.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Research Centres and Groups: Creative Technology
Subjects: M Music. Literature on music. Musical instruction and study > ML Literature on music > ML3800 Philosophical and societal aspects of music. Physics and acoustics of music. Physiological aspects of music > ML3805 Physics and acoustics
T Technology > TA Engineering (General). Civil engineering (General) > TA0365 Acoustics in engineering. Acoustical engineering
Depositing User: Gianluca Memoli
Date Deposited: 02 Jan 2018 12:40
Last Modified: 02 Jan 2018 12:40
URI: http://sro.sussex.ac.uk/id/eprint/72512

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