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Issue 23, 2016
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A highly sensitive compact liquid sensor based on slotted phononic crystal plates

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Abstract

Liquid sensing is achieved by using slotted phononic crystal plates (SPCP). The sensing mechanism is based on the fact that an acoustic wave confined in a small liquid slot intensively interacts with the liquid sample in the slot, and the acoustic energy flux transmission spectrum of the SPCP system strongly depends on the acoustic properties of the liquid in the slot. Consequently, the resonance frequency of the sensing system varies with the density and sound velocity of the liquid sample. Compared with the traditional Lamb wave sensor, the SPCP sensor exhibits a higher sensitivity and requires a minimal amount of liquid sample. These attractive advantages may allow the SPCP liquid sensor to be easily integrated into a chip for broad lab-on-chip biochemical sensing applications.

Graphical abstract: A highly sensitive compact liquid sensor based on slotted phononic crystal plates

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Article information


Submitted
14 Sep 2016
Accepted
17 Oct 2016
First published
17 Oct 2016

Lab Chip, 2016,16, 4595-4600
Article type
Paper

A highly sensitive compact liquid sensor based on slotted phononic crystal plates

C. Wang, F. Cai, F. Li, L. Meng, J. Li, J. Wu, Y. Kang and H. Zheng, Lab Chip, 2016, 16, 4595
DOI: 10.1039/C6LC01151A

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