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A multi-parameter decoupling method with a Lamb wave sensor for improving the selectivity of label-free liquid detection.

Zhou L, Wu Y, Xuan M, Manceau JF, Bastien F - Sensors (Basel) (2012)

Bottom Line: We found they can play very different roles in the detections.Here, the A(0) mode is used to identify the density of the detected liquid and with this density value we obtained the viscosity by the amplitude shifts of the S(0) mode.This could be a way to distinguish an unknown liquid with high sensitivity or to solve the problem of selectivity of label-free detection on biosensors.

View Article: PubMed Central - PubMed

Affiliation: Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China. zhoulq@sibet.ac.cn

ABSTRACT
In this paper, a liquid multi-parameter decoupling method with only one Lamb wave sensor is presented. In a Lamb wave sensor, antisymmetric modes (A(01) mode for low frequency, A(03) mode for high frequency) and symmetric modes (S(0) mode) are used to detect multiple parameters of a liquid, such as its density, sound velocity, and viscosity. We found they can play very different roles in the detections. For example, the A(01) mode is very sensitive to the liquid's density but the A(03) mode is sensitive to the sound velocity. Here, the A(0) mode is used to identify the density of the detected liquid and with this density value we obtained the viscosity by the amplitude shifts of the S(0) mode. This could be a way to distinguish an unknown liquid with high sensitivity or to solve the problem of selectivity of label-free detection on biosensors.

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Related in: MedlinePlus

The responses of the A01 mode, the A03 mode, and the S0 mode to the air and the water loading on the Lamb wave sensor.
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f2-sensors-12-10369: The responses of the A01 mode, the A03 mode, and the S0 mode to the air and the water loading on the Lamb wave sensor.

Mentions: When the device is loaded with air or water, multi-modes can be excited and detected effectively, including the A01 mode, the A03 mode, and the S0 mode (Figure 2). As the A01 and A03 modes are harmonic, the wavelength of the A03 mode is about one third of the wavelength of the A01 mode. According to the positions of the A01 mode, A03 mode and S0 mode in the dispersion curves [41,42], the resonant frequencies (f) of these three modes should have the following relation: fA01 < fA03 < fS0. The measured resonant frequency of the A01 and A03 modes for water loading are 0.987 and 9.233 MHz, respectively. With the frequency (f) and the wavelength (λ), the corresponding phase velocities (fλ) of these two modes are 385 m/s and 1,200 m/s respectively. Although the phase velocity of the A01 mode is far less than the sound velocity of water (1,485.5 m/s), it is close to the sound velocity of water for the A03 mode. With the same water loading for the S0 mode, the measured central resonant frequency is about 20.86 MHz. The corresponding phase velocity of the S0 mode is about 8,135.4 m/s. Further experiments were conducted to investigate the response of multi-modes to the different solutions.


A multi-parameter decoupling method with a Lamb wave sensor for improving the selectivity of label-free liquid detection.

Zhou L, Wu Y, Xuan M, Manceau JF, Bastien F - Sensors (Basel) (2012)

The responses of the A01 mode, the A03 mode, and the S0 mode to the air and the water loading on the Lamb wave sensor.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472832&req=5

f2-sensors-12-10369: The responses of the A01 mode, the A03 mode, and the S0 mode to the air and the water loading on the Lamb wave sensor.
Mentions: When the device is loaded with air or water, multi-modes can be excited and detected effectively, including the A01 mode, the A03 mode, and the S0 mode (Figure 2). As the A01 and A03 modes are harmonic, the wavelength of the A03 mode is about one third of the wavelength of the A01 mode. According to the positions of the A01 mode, A03 mode and S0 mode in the dispersion curves [41,42], the resonant frequencies (f) of these three modes should have the following relation: fA01 < fA03 < fS0. The measured resonant frequency of the A01 and A03 modes for water loading are 0.987 and 9.233 MHz, respectively. With the frequency (f) and the wavelength (λ), the corresponding phase velocities (fλ) of these two modes are 385 m/s and 1,200 m/s respectively. Although the phase velocity of the A01 mode is far less than the sound velocity of water (1,485.5 m/s), it is close to the sound velocity of water for the A03 mode. With the same water loading for the S0 mode, the measured central resonant frequency is about 20.86 MHz. The corresponding phase velocity of the S0 mode is about 8,135.4 m/s. Further experiments were conducted to investigate the response of multi-modes to the different solutions.

Bottom Line: We found they can play very different roles in the detections.Here, the A(0) mode is used to identify the density of the detected liquid and with this density value we obtained the viscosity by the amplitude shifts of the S(0) mode.This could be a way to distinguish an unknown liquid with high sensitivity or to solve the problem of selectivity of label-free detection on biosensors.

View Article: PubMed Central - PubMed

Affiliation: Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China. zhoulq@sibet.ac.cn

ABSTRACT
In this paper, a liquid multi-parameter decoupling method with only one Lamb wave sensor is presented. In a Lamb wave sensor, antisymmetric modes (A(01) mode for low frequency, A(03) mode for high frequency) and symmetric modes (S(0) mode) are used to detect multiple parameters of a liquid, such as its density, sound velocity, and viscosity. We found they can play very different roles in the detections. For example, the A(01) mode is very sensitive to the liquid's density but the A(03) mode is sensitive to the sound velocity. Here, the A(0) mode is used to identify the density of the detected liquid and with this density value we obtained the viscosity by the amplitude shifts of the S(0) mode. This could be a way to distinguish an unknown liquid with high sensitivity or to solve the problem of selectivity of label-free detection on biosensors.

Show MeSH
Related in: MedlinePlus