A large scale X-Y positioning and localisation system of liquid droplet using SAW on LiNbO/sub 3/

Alzuaga, S.; Ballandras, S.; Baudin, François; Daniau, W.; Gauthier‐Manuel, Bernard; Manceau, Jean-François; Cretin, B.; Vairac, Pascal; Laude, Vincent; Khelif, A.; Duhamel, R.

doi:10.1109/ultsym.2003.1293260

Cited by 15 publications

(10 citation statements)

References 4 publications

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“…Therefore, a SAW streaming phenomenon can be classified according to the applied voltage [7]. The SAW streaming phenomenon has been applied for a micromanipulator [6,8], a liquid pump [4], an atomizer [7,9,10], and a lab-on-a-chip [11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Development of temperature-control system for liquid droplet using surface Acoustic wave devices

Kondoh

Shimizu

Matsui

et al. 2009

Sensors and Actuators A: Physical

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In this paper, we present a liquid-droplet-heating system using a surface acoustic wave (SAW) device. When liquid is placed on a Rayleigh-SAW-propagating surface, a longitudinal wave is radiated into the liquid. If the SAW amplitude increases, the liquid shows nonlinear dynamics, such as vibrating, streaming, small droplet flying, and atomizing. This phenomenon is well known as SAW streaming. The liquid temperature is measured during the longitudinal wave radiation and found to increase. First, the mechanism of the liquid heating effect is discussed on the basis of experimental results. The surface electrical condition is changed to investigate the effect of dielectric heating. The obtained results indicate that the radiated longitudinal wave causes liquid heating and the dielectric heating effect does not. Second, the fundamental properties of the liquid temperature are measured by varying the applied voltage, duty factor, and liquid viscosity. The liquid temperature is found to be proportional to the duty factor and the square of the applied voltage. Therefore, the liquid temperature can be controlled by these applied signals. Also, by using highly viscous solutions, the liquid temperature is increased to more than 100 ˚C. Moreover, for chemical applications, the possibility of periodic temperature control is tested by varying the duty factor. The obtained results strongly suggest that an efficient thermal cycler is realized. A novel application of the SAW device is proposed on the basis of SAW streaming.

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Section: Introductionmentioning

confidence: 99%

Development of temperature-control system for liquid droplet using surface Acoustic wave devices

Kondoh

Shimizu

Matsui

et al. 2009

Sensors and Actuators A: Physical

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“…Shiokawa et al focused the phenomenon and proposed a droplet manipulation method using the SAW [3]. In recent years, many papers about droplet manipulations using the SAW have been published [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Novel digital microfluidic system using a surface acoustic wave device

Sugita

Kondoh

2010

2010 IEEE Sensors

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A droplet manipulation is one application of a surface acoustic wave (SAW) device. In this paper, a novel digital microfluidic system using SAW device is described. The system which is called micro-laboratory consists of sensor plate/matching layer/ piezoelectric substrate. The piezoelectric substrate is used for generating the SAW. At the piezoelectric substrate and matching layer interface, the SAW radiates a longitudinal wave into the layer. When the longitudinal wave reflects at the sensor plate and matching layer interface, a bulk acoustic wave (BAW) is generated into the plate. The BAW is used to manipulate a droplet on the sensor plate. For detecting droplet characteristics, an interdigital electrode (IDE) is fabricated on the sensor plate. Using the IDE, impedance change due to a urease catalytic reaction is measured. The results indicate that the proposed system is able to use a detector of urea concentration.

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“…Alzuaga et al [27] have proposed the use of a substrate including many opposite pairs of IDTs distributed around the working area. When a droplet is actuated between a given pair (emitter-receiver), the acoustic signal sent by the emitter is attenuated and this attenuation, detected by the receiver, allows localization along one direction.…”

Section: Introductionmentioning

confidence: 99%