TY - JOUR
T1 - Micromixing using swirling induced by three-dimensional dual surface acoustic waves (3D-dSAW)
AU - Nam, Jeonghun
AU - Lim, Chae Seung
N1 - Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2016R1C1B1014991 ). We thank Prof. Sangho Kim and Dr. Meongkeun Ju of the Department of Biomedical Engineering, National University of Singapore, for partial financial support for this research and for the Lattice Boltzmann method (LBM) simulation.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/2
Y1 - 2018/2
N2 - Efficient mixing in a microfluidic system is difficult to achieve, since it is dependent solely on molecular diffusion due to low Reynolds number. In this paper, we newly propose a novel mixing technique using three-dimensional dual surface acoustic waves (3D-dSAWs) generated from two interdigitated transducers of top and bottom piezoelectric substrates. By using the 3D-dSAW, internal swirling in a single direction is induced, which can facilitate more efficient mixing of a fluorescent particle suspension and deionized water. Therefore, by using the 3D-dSAW mixer, higher efficiency mixing performance can be achieved compared to the single SAW mixer at the same flow rate and applied voltage. With the applied voltage of 14 V, 3D-dSAW mixing device could achieve 100% mixing efficiency at the flow rate of 50 μl/min, while the mixing efficiency of the traditional single SAW mixer was approximately 38%. Moreover, the throughput of 3D-dSAW mixing device could be enhanced up to 120 μl/min with the applied voltage of 18 V, at which the measured temperature was lower than 40 °C and the efficiency could reach approximately ∼95.6%.
AB - Efficient mixing in a microfluidic system is difficult to achieve, since it is dependent solely on molecular diffusion due to low Reynolds number. In this paper, we newly propose a novel mixing technique using three-dimensional dual surface acoustic waves (3D-dSAWs) generated from two interdigitated transducers of top and bottom piezoelectric substrates. By using the 3D-dSAW, internal swirling in a single direction is induced, which can facilitate more efficient mixing of a fluorescent particle suspension and deionized water. Therefore, by using the 3D-dSAW mixer, higher efficiency mixing performance can be achieved compared to the single SAW mixer at the same flow rate and applied voltage. With the applied voltage of 14 V, 3D-dSAW mixing device could achieve 100% mixing efficiency at the flow rate of 50 μl/min, while the mixing efficiency of the traditional single SAW mixer was approximately 38%. Moreover, the throughput of 3D-dSAW mixing device could be enhanced up to 120 μl/min with the applied voltage of 18 V, at which the measured temperature was lower than 40 °C and the efficiency could reach approximately ∼95.6%.
KW - Acoustic streaming
KW - Micromixer
KW - Surface acoustic wave
KW - Swirling
UR - http://www.scopus.com/inward/record.url?scp=85030538957&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2017.09.173
DO - 10.1016/j.snb.2017.09.173
M3 - Article
AN - SCOPUS:85030538957
VL - 255
SP - 3434
EP - 3440
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -