Development of practical surface acoustic wave liquid sensing system and its application for measurement of Japanese tea

Kondoh, Jun; Muramatsu, T.; Nakanishi, Tetsuo; Matsui, Yoshikazu; Shiokawa, Showko

doi:10.1016/s0925-4005(03)00263-6

Cited by 35 publications

(14 citation statements)

References 7 publications

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“…83 Since then, the applicability of shear horizontal has been expanded, including oil contamination 34 and heavy metals 84 in ground water. The latter study by Ramshani et al took advantage of modern fabrication techniques to develop a cost efficient and easy-to-use flow cells for heavy metal compound sensing (Fig.…”

Section: Saw-based Sensorsmentioning

confidence: 99%

Surface acoustic wave devices for chemical sensing and microfluidics: a review and perspective

et al. 2017

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Surface acoustic waves (SAWs), are electro-mechanical waves that form on the surface of piezoelectric crystals. Because they are easy to construct and operate, SAW devices have proven to be versatile and powerful platforms for either direct chemical sensing or for upstream microfluidic processing and sample preparation. This review summarizes recent advances in the development of SAW devices for chemical sensing and analysis. The use of SAW techniques for chemical detection in both gaseous and liquid media is discussed, as well as recent fabrication advances that are pointing the way for the next generation of SAW sensors. Similarly, applications and progress in using SAW devices as microfluidic platforms are covered, ranging from atomization and mixing to new approaches to lysing and cell adhesion studies. Finally, potential new directions and perspectives on the field as it moves forward are offered, with a specific focus on potential strategies for making SAW technologies for bioanalytical applications.

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Section: Saw-based Sensorsmentioning

confidence: 99%

Surface acoustic wave devices for chemical sensing and microfluidics: a review and perspective

et al. 2017

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“…Acoustic waves that concentrate energy and propagate on elastic body surfaces (SAW: Surface Acoustic Wave) are used in actuators [1][2][3][4][5][6][7][8][9] and sensors [10][11][12][13]. When an object is placed on the surface of an elastic body, SAWs act on the object and drive it, while attenuating.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient liquid flow actuator operated by surface acoustic waves

Saiki

Okada

Utsumi

2011

Elect Comm in Japan

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SUMMARYSurface acoustic wave (SAW) devices, because of their very simple structures, can be used as component parts for micro total analysis systems. We focused on a liquid flow actuator operated by SAWs and investigated highly efficient interdigital transducers (IDTs) to generate SAWs. The IDTs were fabricated by patterning Al/Cr on a LiNbO 3 substrate. In an IDT with a stripline pitch of 200 µm, effective water droplet streaming was produced. We also fabricated a continuous liquid flow actuator consisting of both an IDT and a flow channel made of epoxy-based negative resist SU-8 on one chip. To diversify the liquids used, we created an actuator design in which the IDT and liquid do not directly touch one another at the partition wall. Using this chip, we succeeded in creating a continuous flow of liquid using the SAWs. When 160 mW of electric power was applied, the liquid flow rate of the actuator was approximately 7.8 µL/s. We experimentally found that the electric power applied to the IDT was proportional to flow velocity and that the IDT with 200 µm pitch produced effective continuous liquid flow as well as water droplet streaming.

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“…Actuators and sensors that are used with surface acoustic waves (SAWs) that propagate along the surface of an elastic body have been reported (Andle et al 1994;Chono et al 2004;Galopin et al 2006;Ito et al 2007;Kondoh et al 2003;Kurosawa et al 1996;Renaudin et al 2005;Shiokawa et al 2004;Sritharan et al 2006;Sroyanov et al 2005;Utsumi et al 2008;Wixforth 2003;Yamamoto et al 2005). When an object is put on a propagating surface, the object moves and the SAWs attenuate.…”

Section: Introductionmentioning

confidence: 99%

Micro liquid rotor operated by surface-acoustic-wave

2010

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A micro liquid rotor operated by surface acoustic waves (SAWs) was proposed and fabricated. The liquid rotor has two interdigital transducers (IDTs) that generate SAWs, in order to increase efficiency of rotating the liquid. The IDTs were fabricated by patterning Al/Cr on a LiNbO 3 substrate. Moreover, the liquid rotor has a cylindrical liquid pool of 4 mm diameter and 200 lm depth. A sidewall of the liquid pool was made of epoxybased negative photoresist on the substrate. As characteristics of the liquid rotor, we investigated relationships between electric power applied to the IDTs and angular velocity of the liquid or its temperature. Through experimentation, it was shown that the angular velocity and the temperature increase with increasing the electric power. When the fabricated liquid rotor was applied electric power of 2 W, the liquid of 5 lL rotated at 330 rad/s (3,100 rpm) and its temperature reached 65°C.

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Development of practical surface acoustic wave liquid sensing system and its application for measurement of Japanese tea

Cited by 35 publications

References 7 publications

Surface acoustic wave devices for chemical sensing and microfluidics: a review and perspective

Surface acoustic wave devices for chemical sensing and microfluidics: a review and perspective

Highly efficient liquid flow actuator operated by surface acoustic waves

Micro liquid rotor operated by surface-acoustic-wave

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