High‐Efficiency Mixing Chip with Liquid Flow Actuators Operated by Surface Acoustic Waves

Saiki, Takanao; Utsumi, Yuichi

doi:10.1002/ecj.11440

Cited by 11 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, droplet or microwell), new strategies are emerging for continuous flow mixing. 175,176 This offers additional challenges as the bulk flow can decrease the residence time in the mixing region, which subsequently decreases the mixing intensity and/or concentration effectiveness. Recently, Gracioso Martins et al used this approach to design a fully miniaturized flow injection analysis-chemiluminescence (FIA-CL) system with an integrated, on-board-powered SAW microcentrifuge (Fig.…”

Section: Saw-integrated Microfluidicsmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

Section: Saw-integrated Microfluidicsmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Two types of continuous micropump were reported. 13,47,48) One is the jet-type micropump realized by Shiokawa and coworkers. 13,47) The other is the planar micropump realized by Saiki et al 48) The continuous micropump can be applied to a microfluidic system.…”

Section: Observation Resultsmentioning

confidence: 99%

Nonlinear acoustic phenomena caused by surface acoustic wave and its application to digital microfluidic system

Kondoh

2018

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Nonlinear acoustic phenomena of liquid are caused by a surface acoustic wave (SAW) on a piezoelectric substrate. In this paper, the phenomena are summarized and the mechanism is discussed on the basis of experimental results. Droplet manipulation is one of the phenomena and an important application for the SAW device. When a sensor is fabricated on the droplet manipulation surface, an integrated system consisting of the sensor and actuator is realized, which is called a digital microfluidic system (DMFS). The manipulation, mixture, temperature control, and measurement of droplets are possible on the DMFS. Two types of DMFS using 128YX-LiNbO3 are discussed in this paper. One is a piezoelectric substrate surface and the other is the three-layer structure of sensor plate/thin liquid layer/piezoelectric substrate. Droplets are manipulated on the sensor plate. The validity of the DMFS is experimentally confirmed. In addition, an integration system of SAW and shear horizontal-SAW is described.

show abstract

“…Therefore, the SAW actuator has a simpler structure than the ultrasonic wave device and has the major advantage of being easily fabricated. Note that, in related studies on SAW actuators, liquid flow has been mainly reported, (8)(9)(10)(11)(12)(13)(14) and there are very few reports on the transport of solids. (7,15) Currently, copper powder has been the only powder reported to be transported toward the SAW downstream side.…”

Section: Introductionmentioning

confidence: 99%

Transporting Powder with Surface Acoustic Waves Propagating on Tilted Substrate

Saiki¹,

Takizawa²,

Kaneyoshi³

et al. 2021

Sensors and Materials

Self Cite

View full text Add to dashboard Cite

We fabricated a surface acoustic wave (SAW) actuator by patterning an interdigital transducer (IDT) made of Al film on a LiNbO 3 substrate and investigated its transport characteristics with powders of spherical copper, spherical glass, spherical polyethylene, and angular alumina particles with sizes of about 100 µm. The IDT had a 2 mm pitch size, 10 mm aperture, and 10 stripline pairs. It was found that the glass, polyethylene, and alumina powders that could not be transported when the actuator was horizontal could be transported by tilting the actuator, i.e., the powder transport path. It was also found that the powder movement response times with SAWs were shorter than 50 ms when the actuator, tilted at suitable angles of 0°, 6°, 15°, and 26°, transported the copper, glass, polyethylene, and alumina powders, respectively. Then, we fabricated miniature feeders by mounting hoppers on SAW actuators tilted at the above angles and investigated their powder feed characteristics. It was found that, when the feeders were driven for 50 ms at an electric power of 1 W, the fed weights of the copper and glass powders, which did not have flowability problems, were 2.3 and 0.9 mg, respectively.This version has been created for advance publication by formatting the accepted manuscript. Some editorial changes may be made to this version.

show abstract

High‐Efficiency Mixing Chip with Liquid Flow Actuators Operated by Surface Acoustic Waves

Cited by 11 publications

References 21 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

Nonlinear acoustic phenomena caused by surface acoustic wave and its application to digital microfluidic system

Transporting Powder with Surface Acoustic Waves Propagating on Tilted Substrate

Contact Info

Product

Resources

About