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Zhang K, Xiang W, Jia N, Yu M, Liu J, Xie Z. A portable microfluidic device for thermally controlled granular sample manipulation. LAB ON A CHIP 2024; 24:549-560. [PMID: 38168724 DOI: 10.1039/d3lc00888f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Effective granular sample manipulation with a portable and visualizable microfluidic device is significant for lots of applications, such as point-of-care testing and cargo delivery. Herein, we report a portable microfluidic device for controlled particle focusing, migration and double-emulsion droplet release via thermal fields. The device mainly contains a microfluidic chip, a microcontroller with a DC voltage control unit, a built-in microscope with a video transmission unit and a smartphone. Five microheaters located at the bottom of the microfluidic chip are used to unevenly heat fluids and then induce thermal buoyancy flow and a thermocapillary effect, and the experiments can be conveniently visualized through a smartphone, which provides convenient sample detection in outdoor environments. To demonstrate the feasibility and multifunctionality of this device, the focusing manipulation of multiple particles is first analyzed by using silica particles and yeast cells as experimental samples. We can directly observe the particle focusing states on the screen of a smartphone, and the particle focusing efficiency can be flexibly tuned by changing the control voltage of the microheater. Then the study focus is transferred to single-particle migration. By changing the voltage combinations applied on four strip microheaters, the single particle can migrate at predetermined trajectory and speed, showing attractiveness for those applications needing sample transportation. Finally, we manipulate the special three-phase flow system of double-emulsion drops in thermal fields. Under the combined effect of the thermocapillary effect and increased instability, the shell of double-emulsion droplets gradually thins and finally breaks, resulting in the release of samples in inner cores. The core release speed can also be flexibly adjusted by changing the control voltage of the microheater. These three experiments successfully demonstrate the effectiveness and multifunctionality of this thermally actuated microfluidic device on granular manipulation. Therefore, this portable microfluidic device will be promising for lots of applications, such as analytical detection, microrobot actuation and cargo release.
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Affiliation(s)
- Kailiang Zhang
- College of Mechanical and Electrical Engineering, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang, PR China 150040.
| | - Wei Xiang
- College of Mechanical and Electrical Engineering, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang, PR China 150040.
| | - Na Jia
- College of Mechanical and Electrical Engineering, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang, PR China 150040.
| | - Mingyu Yu
- College of Mechanical and Electrical Engineering, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang, PR China 150040.
| | - Jiuqing Liu
- College of Mechanical and Electrical Engineering, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang, PR China 150040.
| | - Zhijie Xie
- College of Mechanical and Electrical Engineering, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang, PR China 150040.
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2
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Yu N, Geng W, Liu Y, Zhang H, Lu H, Duan Z, Yang L, Zhang Y, Chou X. Robust global arrangement by coherent enhancement in Huygens-Fresnel traveling surface acoustic wave interference field. Anal Bioanal Chem 2024; 416:509-518. [PMID: 37989848 DOI: 10.1007/s00216-023-05058-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 11/23/2023]
Abstract
The application of standing surface acoustic wave (SSAW) tweezers based on backpropagation superposition to achieve precise behavior manipulation of microscale cells and even nanoscale bacteria has been widely studied and industrialized. However, the structure requires multiple transducer components or full channel resonance. It is very challenging to design a simple structure for nano-control by complex acoustic field. In this study, a reflector-interdigital transducer (R-IDT) acoustofluidic device based on unilateral coherence enhancement is proposed to achieve SSAW definition features of periodic particle capture positions. The SAW device based on a unilateral transducer can not only generate leaky-SAW in water-filled microchannel, but also have a contribution of spherical waves in the vibration area of the substrate-liquid interface due to the Huygens-Fresnel diffractive principle. Both of them form a robust time-averaged spatial periodicity in the pressure potential gradient, accurately predicting the lateral spacing of these positions through acoustic patterning methods. Furthermore, a reflector based on Bragg-reflection is used to suppress backward transmitted SAW and enhance forward conducted SAW beams. By using a finite element model, R-IDT structure's amplitude enhances 60.78% compared to single IDT structure. The particle manipulation range of the diffractive acoustic field greatly improves, verified by experimental polystyrene microspheres. Besides, biocompatibility is conformed through red blood cells and Bacillus subtilis. We investigate the overall shift of periodic pressure field that can still occur when the phase changes. This work provides a simpler and low-cost solution for the application of acoustic tweezer in biological cell culture and filtering.
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Affiliation(s)
- Nanxin Yu
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China
| | - Wenping Geng
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China.
| | - Yukai Liu
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China
| | - Huiyi Zhang
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Instrument and Electronics, North University of China, Taiyuan, 030051, China
| | - Hao Lu
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China
| | - Zhigang Duan
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China
| | - Lingxiao Yang
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China
| | - Yichi Zhang
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Semiconductor and Physics, North University of China, Taiyuan, 030051, China
| | - Xiujian Chou
- Key Laboratory of National Defense Science and Technology On Electronic Measurement, School of Instrument and Electronics, North University of China, Taiyuan, 030051, China
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3
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Fakhfouri A, Colditz M, Devendran C, Ivanova K, Jacob S, Neild A, Winkler A. Fully Microfabricated Surface Acoustic Wave Tweezer for Collection of Submicron Particles and Human Blood Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:24023-24033. [PMID: 37188328 PMCID: PMC10215297 DOI: 10.1021/acsami.3c00537] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/25/2023] [Indexed: 05/17/2023]
Abstract
Precise manipulation of (sub)micron particles is key for the preparation, enrichment, and quality control in many biomedical applications. Surface acoustic waves (SAW) hold tremendous promise for manipulation of (bio)particles at the micron to nanoscale ranges. In commonly used SAW tweezers, particle manipulation relies on the direct acoustic radiation effect whose superior performance fades rapidly when progressing from micron to nanoscale particles due to the increasing dominance of a second order mechanism, termed acoustic streaming. Through reproducible and high-precision realization of stiff microchannels to reliably actuate the microchannel cross-section, here we introduce an approach that allows the otherwise competing acoustic streaming to complement the acoustic radiation effect. The synergetic effect of both mechanisms markedly enhances the manipulation of nanoparticles, down to 200 nm particles, even at relatively large wavelength (300 μm). Besides spherical particles ranging from 0.1 to 3 μm, we show collections of cells mixed with different sizes and shapes inherently existing in blood including erythrocytes, leukocytes, and thrombocytes.
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Affiliation(s)
| | - Melanie Colditz
- Leibniz-IFW
Dresden, Helmholtzstr.
20, 01069 Dresden, Germany
| | - Citsabehsan Devendran
- Department
of Mechanical and Aerospace Engineering Monash University, Clayton, Victoria 3800, Australia
| | | | - Stefan Jacob
- Physikalisch-Technische
Bundesanstalt, Bundesallee
100, 38116, Brunswick, Germany
| | - Adrian Neild
- Department
of Mechanical and Aerospace Engineering Monash University, Clayton, Victoria 3800, Australia
| | - Andreas Winkler
- Leibniz-IFW
Dresden, Helmholtzstr.
20, 01069 Dresden, Germany
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4
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Liu X, Zheng T, Wang C. Three-dimensional modeling and experimentation of microfluidic devices driven by surface acoustic wave. ULTRASONICS 2023; 129:106914. [PMID: 36577304 DOI: 10.1016/j.ultras.2022.106914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/30/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Surface acoustic wave (SAW) technology is proving to be an effective tool for manipulating micro-nano particles. In this paper, we present a fully-coupled 3D model of standing SAW acoustofluidic devices for obtaining particle motion. The "improved limiting velocity method" (ILVM) was used to investigate the distribution of acoustic pressure and acoustic streaming in microchannel. The results show that the distribution of acoustic pressure and acoustic streaming on the piezoelectric substrate surface perpendicular to the acoustic wave propagation direction is inhomogeneous. The motion of micro-particles with diameters of 0.5-, 5-, and 10 μm is then simulated to investigate the interaction of acoustic radiation force and drag force caused by pressure and acoustic streaming. We demonstrate that micro and nanoparticles can move in three dimensions when acoustic radiation force and acoustic streaming interact. This result and method are critical for designing SAW microfluidic chips and controlling particle motion precisely.
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Affiliation(s)
- Xia Liu
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China; Shaanxi Key Lab of Intelligent Robots, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Tengfei Zheng
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China; Shaanxi Key Lab of Intelligent Robots, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Chaohui Wang
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China; Shaanxi Key Lab of Intelligent Robots, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
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5
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Ang B, Sookram A, Devendran C, He V, Tuck K, Cadarso V, Neild A. Glass-embedded PDMS microfluidic device for enhanced concentration of nanoparticles using an ultrasonic nanosieve. LAB ON A CHIP 2023; 23:525-533. [PMID: 36633124 DOI: 10.1039/d2lc00802e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Surface acoustic wave (SAW) driven devices typically employ polymeric microfluidic channels of low acoustic impedance mismatch to the fluid in contact, to allow precise control of the wave field. Several of these applications, however, can benefit from the implementation of an acoustically reflective surface at the microfluidic channel's ceiling to increase energy retention within the fluid and hence, performance of the device. In this work, we embed a glass insert at the ceiling of the PDMS microfluidic channel used in a SAW activated nanosieve, which utilises a microparticle resonance for enrichment of nanoparticles. Due to the system's independence of performance on channel geometry and wave field pattern, the glass-inserted device allowed for a 30-fold increase in flow rate, from 0.05 μl min-1 to 1.5 μL min-1, whilst maintaining high capture efficiencies of >90%, when compared to its previously reported design. This effectively enables the system to process larger volume samples, which typically is a main limitation of these type of devices. This work demonstrates a simple way to increase the performance and throughput of SAW-based devices, especially within systems that can benefit from the energy retention.
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Affiliation(s)
- Bryan Ang
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3800, VIC, Australia.
- Centre to Impact Antimicrobial Resistance, Monash University, Clayton 3800, VIC, Australia
| | - Ankush Sookram
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3800, VIC, Australia.
| | - Citsabehsan Devendran
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3800, VIC, Australia.
| | - Vincent He
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3800, VIC, Australia.
| | - Kellie Tuck
- School of Chemistry, Monash University, Clayton 3800, VIC, Australia
| | - Victor Cadarso
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3800, VIC, Australia.
- Centre to Impact Antimicrobial Resistance, Monash University, Clayton 3800, VIC, Australia
| | - Adrian Neild
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3800, VIC, Australia.
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6
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Wu Z, Pan M, Wang J, Wen B, Lu L, Ren H. Acoustofluidics for cell patterning and tissue engineering. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
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7
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Li M, Mei J, Friend J, Bae J. Acousto-Photolithography for Programmable Shape Deformation of Composite Hydrogel Sheets. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204288. [PMID: 36216774 DOI: 10.1002/smll.202204288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Stimuli-responsive hydrogels with programmable shapes produced by defined patterns of particles are of great interest for the fabrication of small-scale soft actuators and robots. Patterning the particles in the hydrogels during fabrication generally requires external magnetic or electric fields, thus limiting the material choice for the particles. Acoustically driven particle manipulation, however, solely depends on the acoustic impedance difference between the particles and the surrounding fluid, making it a more versatile method to spatially control particles. Here, an approach is reported by combining direct acoustic force to align photothermal particles and photolithography to spatially immobilize these alignments within a temperature-responsive poly(N-isopropylacrylamide) hydrogel to trigger shape deformation under temperature change and light exposure. The spatial distribution of particles can be tuned by the power and frequency of the acoustic waves. Specifically, changing the spacing between the particle patterns and position alters the bending curvature and direction of this composite hydrogel sheet, respectively. Moreover, the orientation (i.e., relative angle) of the particle alignments with respect to the long axis of laser-cut hydrogel strips governs the bending behaviors and the subsequent shape deformation by external stimuli. This acousto-photolithography provides a means of spatiotemporal programming of the internal heterogeneity of composite polymeric systems.
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Affiliation(s)
- Minghao Li
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jiyang Mei
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - James Friend
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
- Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering, Department of Surgery, School of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jinhye Bae
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
- Department of NanoEngineering, Chemical Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
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8
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Lv H, Chen X. Novel Study on the Mixing Mechanism of Active Micromixers Based on Surface Acoustic Waves. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Honglin Lv
- College of Transportation, Ludong University, Yantai, Shandong 264025, China
| | - Xueye Chen
- College of Transportation, Ludong University, Yantai, Shandong 264025, China
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9
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Zhang Y, Zhao Y, Cole T, Zheng J, Bayinqiaoge, Guo J, Tang SY. Microfluidic flow cytometry for blood-based biomarker analysis. Analyst 2022; 147:2895-2917. [PMID: 35611964 DOI: 10.1039/d2an00283c] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Flow cytometry has proven its capability for rapid and quantitative analysis of individual cells and the separation of targeted biological samples from others. The emerging microfluidics technology makes it possible to develop portable microfluidic diagnostic devices for point-of-care testing (POCT) applications. Microfluidic flow cytometry (MFCM), where flow cytometry and microfluidics are combined to achieve similar or even superior functionalities on microfluidic chips, provides a powerful single-cell characterisation and sorting tool for various biological samples. In recent years, researchers have made great progress in the development of the MFCM including focusing, detecting, and sorting subsystems, and its unique capabilities have been demonstrated in various biological applications. Moreover, liquid biopsy using blood can provide various physiological and pathological information. Thus, biomarkers from blood are regarded as meaningful circulating transporters of signal molecules or particles and have great potential to be used as non (or minimally)-invasive diagnostic tools. In this review, we summarise the recent progress of the key subsystems for MFCM and its achievements in blood-based biomarker analysis. Finally, foresight is offered to highlight the research challenges faced by MFCM in expanding into blood-based POCT applications, potentially yielding commercialisation opportunities.
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Affiliation(s)
- Yuxin Zhang
- Department of Electronic, Electrical and Systems Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
| | - Ying Zhao
- National Chengdu Centre of Safety Evaluation of Drugs, West China Hospital of Sichuan University, Chengdu, China
| | - Tim Cole
- Department of Electronic, Electrical and Systems Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
| | - Jiahao Zheng
- Department of Electronic, Electrical and Systems Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
| | - Bayinqiaoge
- Department of Electronic, Electrical and Systems Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
| | - Jinhong Guo
- The M.O.E. Key Laboratory of Laboratory Medical Diagnostics, The College of Laboratory Medicine, Chongqing Medical University, #1 Yixueyuan Road, Yuzhong District, Chongqing, 400016, China.
| | - Shi-Yang Tang
- Department of Electronic, Electrical and Systems Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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10
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Sachs S, Cierpka C, König J. On the acoustically induced fluid flow in particle separation systems employing standing surface acoustic waves - Part II. LAB ON A CHIP 2022; 22:2028-2040. [PMID: 35485185 DOI: 10.1039/d2lc00106c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Particle separation using surface acoustic waves (SAWs) has been a focus of ongoing research for several years, leading to promising technologies based on Lab-on-a-Chip devices. In many of them, scattering effects of acoustic waves on suspended particles are utilized to manipulate their motion by means of the acoustic radiation force (FARF). Due to viscous damping of radiated waves within a fluid, known as the acoustic streaming effect, a superimposed fluid flow is generated, which additionally affects the trajectories of the particles by drag forces. To evaluate the influence of this acoustically induced flow on the fractionation of suspended particles, the present study gives a deep insight into the pattern and scaling of the resulting vortex structures by quantitative three-dimensional, three component (3D3C) velocity measurements. Following the analysis of translationally invariant structures at the center of a pseudo-standing surface acoustic wave (sSAW) in Part I, the focus in Part II turns to the outer regions of acoustic actuation. The impact of key parameters on the formation of the outer vortices, such as the wavelength of the SAW λSAW, the channel height H and electrical power Pel, is investigated with respect to the design of corresponding separation systems. As a result of large gradients in the acoustic fields, broadly extended vortices are formed, which can cause a lateral displacement of particles and are thus essential for a holistic analysis of the flow phenomena. The interaction with an externally imposed main flow reveals local recirculation regions, while the extent of the vortices is quantified based on the displacement of the main flow.
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Affiliation(s)
- Sebastian Sachs
- Institute of Thermodynamics and Fluid Mechanics, Technische Universität Ilmenau, D-98684 Ilmenau, Germany.
| | - Christian Cierpka
- Institute of Thermodynamics and Fluid Mechanics, Technische Universität Ilmenau, D-98684 Ilmenau, Germany.
- Institute of Micro- and Nanotechnologies, Technische Universität Ilmenau, D-98684 Ilmenau, Germany
| | - Jörg König
- Institute of Thermodynamics and Fluid Mechanics, Technische Universität Ilmenau, D-98684 Ilmenau, Germany.
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11
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Mokhtare A, Davaji B, Xie P, Yaghoobi M, Rosenwaks Z, Lal A, Palermo G, Abbaspourrad A. Non-contact ultrasound oocyte denudation. LAB ON A CHIP 2022; 22:777-792. [PMID: 35075469 DOI: 10.1039/d1lc00715g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Cumulus removal (CR) is a central prerequisite step for many protocols involved in the assisted reproductive technology (ART) such as intracytoplasmic sperm injection (ICSI) and preimplantation genetic testing (PGT). The most prevalent CR technique is based upon laborious manual pipetting, which suffers from inter-operator variability and therefore a lack of standardization. Automating CR procedures would alleviate many of these challenges, improving the odds of a successful ART or PGT outcome. In this study, a chip-scale ultrasonic device consisting of four interdigitated transducers (IDT) on a lithium niobate substrate has been engineered to deliver megahertz (MHz) range ultrasound to perform denudation. The acoustic streaming and acoustic radiation force agitate COCs inside a microwell placed on top of the LiNbO3 substrate to remove the cumulus cells from the oocytes. This paper demonstrates the capability and safety of the denudation procedure utilizing surface acoustic wave (SAW), achieving automation of this delicate manual procedure and paving the steps toward improved and standardized oocyte manipulation.
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Affiliation(s)
- Amir Mokhtare
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA.
| | - Benyamin Davaji
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA
| | - Philip Xie
- The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Mohammad Yaghoobi
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA.
| | - Zev Rosenwaks
- The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Amit Lal
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA
| | - Gianpiero Palermo
- The Ronald O. Perelman and Claudia Cohen Center for Reproductive Medicine, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Alireza Abbaspourrad
- Department of Food Science, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA.
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12
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Xu M, Lee PVS, Collins DJ. Microfluidic acoustic sawtooth metasurfaces for patterning and separation using traveling surface acoustic waves. LAB ON A CHIP 2021; 22:90-99. [PMID: 34860222 DOI: 10.1039/d1lc00711d] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We demonstrate a sawtooth-based metasurface approach for flexibly orienting acoustic fields in a microfluidic device driven by surface acoustic waves (SAW), where sub-wavelength channel features can be used to arbitrarily steer acoustic fringes in a microchannel. Compared to other acoustofluidic methods, only a single travelling wave is used, the fluidic pressure field is decoupled from the fluid domain's shape, and steerable pressure fields are a function of a simply constructed polydimethylsiloxane (PDMS) metasurface shape. Our results are relevant to microfluidic applications including the patterning, concentration, focusing, and separation of microparticles and cells.
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Affiliation(s)
- Mingxin Xu
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, Australia.
| | - Peter V S Lee
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, Australia.
| | - David J Collins
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, Australia.
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13
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Kolesnik K, Hashemzadeh P, Peng D, Stamp MEM, Tong W, Rajagopal V, Miansari M, Collins DJ. Periodic Rayleigh streaming vortices and Eckart flow arising from traveling-wave-based diffractive acoustic fields. Phys Rev E 2021; 104:045104. [PMID: 34781567 DOI: 10.1103/physreve.104.045104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
Recent studies have demonstrated that periodic time-averaged acoustic fields can be produced from traveling surface acoustic waves (SAWs) in microfluidic devices. This is caused by diffractive effects arising from a spatially limited transducer. This permits the generation of acoustic patterns evocative of those produced from standing waves, but instead with the application of a traveling wave. While acoustic pressure fields in such systems have been investigated, acoustic streaming from diffractive fields has not. In this work we examine this phenomenon and demonstrate the appearance of geometry-dependent acoustic vortices, and demonstrate that periodic, identically rotating Rayleigh streaming vortices result from the imposition of a traveling SAW. This is also characterized by a channel-spanning flow that bridges between adjacent vortices along the channel top and bottom. We find that the channel dimensions determine the types of streaming that develops; while Eckart streaming has been previously presumed to be a distinguishing feature of traveling-wave actuation, we show that Rayleigh streaming vortices also results. This has implications for microfluidic actuation, where traveling acoustic waves have applications in microscale mixing, separation, and patterning.
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Affiliation(s)
- Kirill Kolesnik
- Department of Biomedical Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Pouya Hashemzadeh
- Department of Cancer Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Isar 11, 47138-18983 Babol, Iran
| | - Danli Peng
- Department of Biomedical Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia
- Department of Physics, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Melanie E M Stamp
- Department of Physics, The University of Melbourne, Melbourne, VIC 3010, Australia
- Cognitive Interaction Technology Center (CITEC) Research Institute, Bielefeld University, 33619 Bielefeld, Germany
| | - Wei Tong
- Department of Physics, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Vijay Rajagopal
- Department of Biomedical Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Morteza Miansari
- Micro+Nanosystems & Applied Biophysics Laboratory, Department of Mechanical Engineering, Babol Noshirvani University of Technology, P.O. Box 484, Babol, Iran
- Department of Cancer Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Isar 11, 47138-18983 Babol, Iran
| | - David J Collins
- Department of Biomedical Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia
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14
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Tayebi M, Yang D, Collins DJ, Ai Y. Deterministic Sorting of Submicrometer Particles and Extracellular Vesicles Using a Combined Electric and Acoustic Field. NANO LETTERS 2021; 21:6835-6842. [PMID: 34355908 DOI: 10.1021/acs.nanolett.1c01827] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Sorting of extracellular vesicles has important applications in early stage diagnostics. Current exosome isolation techniques, however, suffer from being costly, having long processing times, and producing low purities. Recent work has shown that active sorting via acoustic and electric fields are useful techniques for microscale separation activities, where combining these has the potential to take advantage of multiple force mechanisms simultaneously. In this work, we demonstrate an approach using both electrical and acoustic forces to manipulate bioparticles and submicrometer particles for deterministic sorting, where we find that the concurrent application of dielectrophoretic (DEP) and acoustophoretic forces decreases the critical diameter at which particles can be separated. We subsequently utilize this approach to sort subpopulations of extracellular vesicles, specifically exosomes (<200 nm) and microvesicles (>300 nm). Using our combined acoustic/electric approach, we demonstrate exosome purification with more than 95% purity and 81% recovery, well above comparable approaches.
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Affiliation(s)
- Mahnoush Tayebi
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - Dahou Yang
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - David J Collins
- Department of Biomedical Engineering, The University of Melbourne, Melbourne, Vitctoria 3010, Australia
| | - Ye Ai
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
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15
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Li L, Wu E, Jia K, Yang K. Temperature field regulation of a droplet using an acoustothermal heater. LAB ON A CHIP 2021; 21:3184-3194. [PMID: 34195725 DOI: 10.1039/d1lc00267h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Heating a droplet without contamination is desired for the emerging applications of microfluidic devices in life science and materials science, especially in the form of controllable temperature distribution. Microfluidic heaters using surface acoustic waves have been recently demonstrated, which highlights an urgent need for an insight into the detailed heating mechanism to guide the development of temperature regulation methodologies. Here, we show that the temperature field of a droplet on the path of a travelling wave can be regulated by modulating the heat source distribution and thermal conduction inside the target. We model the acoustothermal process of the droplet including the effects of electric dissipation, acoustic dissipation, and acoustic-induced steady flow. The electric-mechanical-acoustic coupling contributes to the dominant heat source, and we call it acoustic heat source. The nonlinear effects of incident waves generate acoustic vortexes with a velocity of up to 20 mm s-1, inducing forced convection inside the droplet to enhance heat transfer. The equilibrium temperature field of a droplet is determined by a synergy of dissipative acoustic attenuation and acoustic streaming. We demonstrate that the distribution of the acoustic heat source and the patterns of acoustic streaming can be modulated by fluid viscosity and droplet size. Various spatial combinations of the acoustic heat source and steady streaming make different temperature fields in the droplet. We also propose a phase diagram of the temperature distribution in the droplet. This methodology enables opportunities for temperature-related processing inside a droplet bioparticle carrier or microreactor.
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Affiliation(s)
- Liqiang Li
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Eryong Wu
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, P. R. China
| | - Kun Jia
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, No. 28 West Xianning Road, 710049, Xi'an, P. R. China.
| | - Keji Yang
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou, 310027, P. R. China
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16
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Liu Z, Xu G, Ni Z, Chen X, Guo X, Tu J, Zhang D. Theory of acoustophoresis in counterpropagating surface acoustic wave fields for particle separation. Phys Rev E 2021; 103:033104. [PMID: 33862812 DOI: 10.1103/physreve.103.033104] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 02/15/2021] [Indexed: 12/25/2022]
Abstract
Acousotophoretic particle separations in counterpropagating surface acoustic wave (SAW) fields, e.g., standing SAWs (SSAWs), phase modulated SSAWs, tilted angle SSAWs, and partial standing SAWs, have proven successful. But there still lacks analytical tools for predicting the particle trajectory and optimizing the device designs. Here, we study the acoustophoresis of spherical Rayleigh particles in counterpropagating SAW fields and find that particle motions can be characterized into two distinct modes, the drift mode and the locked mode. Through theoretical studies, we provide analytical expressions of particle trajectories in different fields and different moving patterns. Based on these, we obtain theory-based protocols for designing such SAW acoustofluidic particle separation chips, which are demonstrated through finite-element simulations. The results here provide theoretical guidelines for designing high throughput and high efficiency particle separation devices.
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Affiliation(s)
- Zixing Liu
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China
| | - Guangyao Xu
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China
| | - Zhengyang Ni
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China
| | - Xizhou Chen
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China
| | - Xiasheng Guo
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China
| | - Juan Tu
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China and The State Key Laboratory of Acoustics, Chinese Academy of Science, Beijing 100190, China
| | - Dong Zhang
- Key Laboratory of Modern Acoustics (MOE), School of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093, China and The State Key Laboratory of Acoustics, Chinese Academy of Science, Beijing 100190, China
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17
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Shen Y, Yalikun Y, Aishan Y, Tanaka N, Sato A, Tanaka Y. Area cooling enables thermal positioning and manipulation of single cells. LAB ON A CHIP 2020; 20:3733-3743. [PMID: 33000103 DOI: 10.1039/d0lc00523a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Contactless particle manipulation based on a thermal field has shown great potential for biological, medical, and materials science applications. However, thermal diffusion from a high-temperature area causes thermal damage to bio-samples. Besides, the permanent bonding of a sample chamber onto microheater substrates requires that the thermal field devices be non-disposable. These limitations impede use of the thermal manipulation approach. Here, a novel manipulation platform is proposed that combines microheaters and an area cooling system to produce enough force to steer sedimentary particles or cells and to limit the thermal diffusion. It uses the one-time fabricated motherboard and an exchangeable sample chamber that provides disposable use. Sedimentary objects can be steered to the bottom center of the thermal field by combined thermal convection and thermophoresis. Single particle or cell manipulation is realized by applying multiple microheaters in the platform. Results of a cell viability test confirmed the method's compatibility in biology fields. With its advantages of biocompatibility for live cells, operability for different sizes of particles and flexibility of platform fabrication, this novel manipulation platform has a high potential to become a powerful tool for biology research.
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Affiliation(s)
- Yigang Shen
- Graduate School of Frontier Biosciences, Osaka University, Osaka 565-0871, Japan
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18
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Weser R, Darinskii AN, Weihnacht M, Schmidt H. Experimental and numerical investigations of mechanical displacements in surface acoustic wave bounded beams. ULTRASONICS 2020; 106:106077. [PMID: 32305680 DOI: 10.1016/j.ultras.2020.106077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/18/2019] [Accepted: 01/01/2020] [Indexed: 06/11/2023]
Abstract
The present paper studies experimentally and numerically the surface acoustic wave (SAW) field on a piezoelectric substrate generated by interdigital transducers (IDT). On the one hand, mechanical displacements produced by the SAW are measured with the help of a laser Doppler vibrometer. On the other hand, mechanical displacements are computed by the two-dimensional finite element method in frequency domain followed by the spatial Fourier transform. Combining these two steps of computations results in the intended two-dimensional distribution of mechanical displacements on the substrate surface. The comparison of experimental and numerical data obtained for a series of different IDTs reveals that it is possible to estimate the shape of the SAW beam and the absolute value of mechanical displacement amplitude using only the basic parameters of the IDT and its electrical admittance measured by a network analyzer.
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Affiliation(s)
- R Weser
- Leibniz Institute for Solid State and Materials Research Dresden, SAWLab Saxony, Helmholtzstr. 20, 01069 Dresden, Germany.
| | - A N Darinskii
- Shubnikov Institute of Crystallography FSRC "Crystallography and Photonics", Russian Academy of Sciences, Leninskii pr. 59, Moscow 119333, Russia
| | - M Weihnacht
- InnoXacs, Am Muehlfeld 34, 01744 Dippoldiswalde, Germany
| | - H Schmidt
- Leibniz Institute for Solid State and Materials Research Dresden, SAWLab Saxony, Helmholtzstr. 20, 01069 Dresden, Germany
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19
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Weser R, Winkler A, Weihnacht M, Menzel S, Schmidt H. The complexity of surface acoustic wave fields used for microfluidic applications. ULTRASONICS 2020; 106:106160. [PMID: 32334142 DOI: 10.1016/j.ultras.2020.106160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 01/27/2020] [Accepted: 02/13/2020] [Indexed: 05/08/2023]
Abstract
Using surface acoustic waves (SAW) for the agitation and manipulation of fluids and immersed particles or cells in lab-on-a-chip systems has been state of the art for several years. Basic tasks comprise fluid mixing, atomization of liquids as well as sorting and separation (or trapping) of particles and cells, e.g. in so-called acoustic tweezers. Even though the fundamental principles governing SAW excitation and propagation on anisotropic, piezoelectric substrates are well-investigated, the complexity of wave field effects including SAW diffraction, refraction and interference cannot be comprehensively simulated at this point of time with sufficient accuracy. However, the design of microfluidic actuators relies on a profound knowledge of SAW propagation, including superposition of multiple SAWs, to achieve the predestined functionality of the devices. Here, we present extensive experimental results of high-resolution analysis of the lateral distribution of the complex displacement amplitude, i.e. the wave field, alongside with the electrical S-parameters of the generating transducers. These measurements were carried out and are compared in setups utilizing travelling SAW (tSAW) excited by single interdigital transducer (IDT), standing SAW generated between two IDTs (1DsSAW, 1D acoustic tweezers) and between two pairs of IDTs (2DsSAW, 2D acoustic tweezers) with different angular alignment in respect to pure Rayleigh mode propagation directions and other practically relevant orientations. For these basic configurations, typically used to drive SAW-based microfluidics, the influence of common SAW phenomena including beam steering, coupling coefficient dispersion and diffraction on the resultant wave field is investigated. The results show how tailoring of the acoustic conditions, based on profound knowledge of the physical effects, can be achieved to finally realize a desired behavior of a SAW-based microacoustic-fluidic system.
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Affiliation(s)
- R Weser
- Leibniz Institute for Solid State and Materials Research Dresden, SAWLab Saxony, Helmholtzstr. 20, 01069 Dresden, Germany.
| | - A Winkler
- Leibniz Institute for Solid State and Materials Research Dresden, SAWLab Saxony, Helmholtzstr. 20, 01069 Dresden, Germany
| | - M Weihnacht
- InnoXacs GmbH, Am Muehlfeld 34, 01744 Dippoldiswalde, Germany
| | - S Menzel
- Leibniz Institute for Solid State and Materials Research Dresden, SAWLab Saxony, Helmholtzstr. 20, 01069 Dresden, Germany
| | - H Schmidt
- Leibniz Institute for Solid State and Materials Research Dresden, SAWLab Saxony, Helmholtzstr. 20, 01069 Dresden, Germany
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20
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Li LQ, Jia K, Wu EY, Zhu YJ, Yang KJ. Design of acoustofluidic device for localized trapping. BIOMICROFLUIDICS 2020; 14:034107. [PMID: 32477446 PMCID: PMC7244329 DOI: 10.1063/5.0006649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/11/2020] [Indexed: 05/13/2023]
Abstract
State of the art acoustofluidics typically treat micro-particles in a multi-wavelength range due to the scale limitations of the established ultrasound field. Here, we report a spatial selective acoustofluidic device that allows trapping micro-particles and cells in a wavelength scale. A pair of interdigital transducers with a concentric-arc shape is used to compress the beam width, while pulsed actuation is adopted to localize the acoustic radiation force in the wave propagating direction. Unlike the traditional usage of geometrical focus, the proposed device is designed by properly superposing the convergent section of two focused surface acoustic waves. We successfully demonstrate a single-column alignment of 15-μm polystyrene particles and double-column alignment of 8-μm T cells in a wavelength scale. Through proof-of-concept experiments, the proposed acoustofluidic device shows potential applications in on-chip biological and chemical analyses, where localized handing is required.
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Affiliation(s)
- Li-qiang Li
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, People’s Republic of China
| | - Kun Jia
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, No. 28 West Xianning Road, 710049 Xi'an, People’s Republic of China
- Author to whom correspondence should be addressed:
| | - Er-yong Wu
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, People’s Republic of China
| | - Yong-jian Zhu
- Department of Neurosurgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Ke-ji Yang
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, People’s Republic of China
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21
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Zhao S, Wu M, Yang S, Wu Y, Gu Y, Chen C, Ye J, Xie Z, Tian Z, Bachman H, Huang PH, Xia J, Zhang P, Zhang H, Huang TJ. A disposable acoustofluidic chip for nano/microparticle separation using unidirectional acoustic transducers. LAB ON A CHIP 2020; 20:1298-1308. [PMID: 32195522 PMCID: PMC7199844 DOI: 10.1039/d0lc00106f] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Separation of nano/microparticles based on surface acoustic waves (SAWs) has shown great promise for biological, chemical, and medical applications ranging from sample purification to cancer diagnosis. However, the permanent bonding of a microchannel onto relatively expensive piezoelectric substrates and excitation transducers renders the SAW separation devices non-disposable. This limitation not only requires cumbersome cleaning and increased labor and material costs, but also leads to cross-contamination, preventing their implementation in many biological, chemical, and medical applications. Here, we demonstrate a high-performance, disposable acoustofluidic platform for nano/microparticle separation. Leveraging unidirectional interdigital transducers (IDTs), a hybrid channel design with hard/soft materials, and tilted-angle standing SAWs (taSSAWs), our disposable acoustofluidic devices achieve acoustic radiation forces comparable to those generated by existing permanently bonded, non-disposable devices. Our disposable devices can separate not only microparticles but also nanoparticles. Moreover, they can differentiate bacteria from human red blood cells (RBCs) with a purity of up to 96%. Altogether, we developed a unidirectional IDT-based, disposable acoustofluidic platform for micro/nanoparticle separation that can achieve high separation efficiency, versatility, and biocompatibility.
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Affiliation(s)
- Shuaiguo Zhao
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
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22
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Bachman H, Gu Y, Rufo J, Yang S, Tian Z, Huang PH, Yu L, Huang TJ. Low-frequency flexural wave based microparticle manipulation. LAB ON A CHIP 2020; 20:1281-1289. [PMID: 32154525 PMCID: PMC7392613 DOI: 10.1039/d0lc00072h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Manipulation of microparticles and bio-samples is a critical task in many research and clinical settings. Recently, acoustic based methods have garnered significant attention due to their relatively simple designs, and biocompatible and precise manipulation of small objects. Herein, we introduce a flexural wave based acoustofluidic manipulation platform that utilizes low-frequency (4-6 kHz) commercial buzzers to achieve dynamic particle concentration and translation in an open fluid well. The device has two primary modes of functionality, wherein particles can be concentrated in pressure nodes that are present on the bottom surface of the device, or particles can be trapped and manipulated in streaming vortices within the fluid domain; both of these functions result from flexural mode vibrations that travel from the transducers throughout the device. Throughout our research, we numerically and experimentally explored the wave patterns generated within the device, investigated the particle concentration phenomenon, and utilized a phase difference between the two transducers to achieve precision movement of fluid vortices and the entrapped particle clusters. With its simple, low-cost nature and open fluidic chamber design, this platform can be useful in many biological, biochemical, and biomedical applications, such as tumor spheroid generation and culture, as well as the manipulation of embryos.
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Affiliation(s)
- Hunter Bachman
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
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23
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Bachman H, Chen C, Rufo J, Zhao S, Yang S, Tian Z, Nama N, Huang PH, Huang TJ. An acoustofluidic device for efficient mixing over a wide range of flow rates. LAB ON A CHIP 2020; 20:1238-1248. [PMID: 32104816 PMCID: PMC7252412 DOI: 10.1039/c9lc01171d] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Whether reagents and samples need to be combined to achieve a desired reaction, or precise concentrations of solutions need to be mixed and delivered downstream, thorough mixing remains a critical step in many microfluidics-based biological and chemical assays and analyses. To achieve complete mixing of fluids in microfluidic devices, researchers have utilized novel channel designs or active intervention to facilitate mass transport and exchange of fluids. However, many of these solutions have a major limitation: their design inherently limits their operational throughput; that is, different designs work at specific flow rates, whether that be low or high ranges, but have difficulties outside of their tailored design regimes. In this work, we present an acoustofluidic mixer that is capable of achieving efficient, thorough mixing across a broad range of flow rates (20-2000 μL min-1) using a single device. Our mixer combines active acoustofluidic mixing, which is responsible for mixing fluids at lower flow rates, with passive hydrodynamic mixing, which accounts for mixing fluids at higher flow rates. The mechanism, functionality, and performance of our acoustofluidic device are both numerically and experimentally validated. Additionally, the real-world potential of our device is demonstrated by synthesizing polymeric nanoparticles with comparable sizes over a two-order-of-magnitude wide range of flow rates. This device can be valuable in many biochemical, biological, and biomedical applications. For example, using our platform, one may synthesize nanoparticles/nanomaterials at lower flow rates to first identify optimal synthesis conditions without having to waste significant amounts of reagents, and then increase the flow rate to perform high-throughput synthesis using the optimal conditions, all using the same single device and maintaining performance.
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Affiliation(s)
- Hunter Bachman
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC 27708, USA.
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24
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Peng H, Mao L, Qian X, Lu X, Jiang L, Sun Y, Zhou Q. Acoustic Energy Controlled Nanoparticle Aggregation for Nanotherapy. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2020; 67:735-744. [PMID: 31794392 DOI: 10.1109/tuffc.2019.2956043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Patients with unresectable or nonablatable tumors are difficult to cure, but nanotherapy combining targeted nanoparticles has many severe side effects due to the toxicities of anticancer drugs. We found that acoustic energy can produce a local region with high concentration from a low concentration suspended liquid of nano-SiO2 particles at 2.5 MHz. Our calculated results show that the main reason for aggregation is the synthesized effect of the potential well of acoustic energy and streaming to trap them. In addition, the aggregated region can be manipulated to a targeted position in the vessel phantom by moving the ultrasound transducer external to the body. This noninvasive manipulation of suspended nanoparticles can rapidly increase the local drug concentration, but reduce the total dosage of anticancer drugs, which has the potential to be used for patients with advanced tumors by improving the physiological effects and reducing the side effects.
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25
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Zhang K, Ren Y, Tao Y, Deng X, Liu W, Jiang T, Jiang H. Efficient particle and droplet manipulation utilizing the combined thermal buoyancy convection and temperature-enhanced rotating induced-charge electroosmotic flow. Anal Chim Acta 2020; 1096:108-119. [DOI: 10.1016/j.aca.2019.10.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 09/09/2019] [Accepted: 10/21/2019] [Indexed: 01/04/2023]
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26
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Brenker JC, Devendran C, Neild A, Alan T. On-demand sample injection: combining acoustic actuation with a tear-drop shaped nozzle to generate droplets with precise spatial and temporal control. LAB ON A CHIP 2020; 20:253-265. [PMID: 31854405 DOI: 10.1039/c9lc00837c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An on-demand droplet injection method for controlled delivery of nanolitre-volume liquid samples to scientific instruments for subsequent analysis is presented. We employ pulsed focussed surface acoustic waves (SAW) to eject droplets from an enclosed microfluidic channel into an open environment. The 3D position of individual droplets and their time of arrival can be precisely controlled to within 61 μs in a 500 μm square target region 40 μm wide. The continuous ejection rate of 16 000 droplets per second can be tuned to produce pulsed trains of droplets from 0 up to 357 Hz. The main benefit of this technique is its ease of integration with complex microfluidic processing steps, such as droplet merging, sorting, and encapsulation, prior to sample delivery. With its ability to precisely deliver a small quantity of fluid to a pre-defined location this technology is applicable in X-ray based molecular studies, including the rapidly expanding field of X-ray free electron lasers. Fabrication procedures for this device, the underlying forcing mechanism, the role of nozzle design, and demonstration of the performance in both continuous and on-demand modes are reported.
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Affiliation(s)
- Jason C Brenker
- Laboratory for Micro Systems, Department of Mechanical and Aerospace, Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Citsabehsan Devendran
- Laboratory for Micro Systems, Department of Mechanical and Aerospace, Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Adrian Neild
- Laboratory for Micro Systems, Department of Mechanical and Aerospace, Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Tuncay Alan
- Laboratory for Micro Systems, Department of Mechanical and Aerospace, Engineering, Monash University, Clayton, Victoria 3800, Australia.
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27
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Lu H, Mutafopulos K, Heyman JA, Spink P, Shen L, Wang C, Franke T, Weitz DA. Rapid additive-free bacteria lysis using traveling surface acoustic waves in microfluidic channels. LAB ON A CHIP 2019; 19:4064-4070. [PMID: 31690904 DOI: 10.1039/c9lc00656g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We report an additive-free method to lyse bacteria and extract nucleic acids and protein using a traveling surface acoustic wave (TSAW) coupled to a microfluidic device. We characterize the effects of the TSAW on E. coli by measuring the viability of cells exposed to the sound waves and find that about 90% are dead. In addition, we measure the protein and nucleic acids released from the cells and show that we recover about 20% of the total material. The lysis method should work for all types of bacteria. These results demonstrate the feasibility of using TSAW to lyse bacteria in a manner that is independent of the type of bacteria.
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Affiliation(s)
- Haiwei Lu
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China and School of Engineering and Applied Sciences, Harvard University, Cambridge, USA.
| | - Kirk Mutafopulos
- School of Engineering and Applied Sciences, Harvard University, Cambridge, USA.
| | - John A Heyman
- School of Engineering and Applied Sciences, Harvard University, Cambridge, USA.
| | - Pascal Spink
- School of Engineering and Applied Sciences, Harvard University, Cambridge, USA.
| | - Liang Shen
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Chaohui Wang
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China
| | - Thomas Franke
- Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow, UK
| | - David A Weitz
- School of Engineering and Applied Sciences, Harvard University, Cambridge, USA. and Department of Physics, Harvard University, Cambridge, USA and Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
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28
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Collins DJ, O'Rorke R, Neild A, Han J, Ai Y. Acoustic fields and microfluidic patterning around embedded micro-structures subject to surface acoustic waves. SOFT MATTER 2019; 15:8691-8705. [PMID: 31657435 DOI: 10.1039/c9sm00946a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Recent research has shown that interactions between acoustic waves and microfluidic channels can generate microscale interference patterns with the application of a traveling surface acoustic wave (SAW), effectively creating standing wave patterns with a traveling wave. Forces arising from this interference can be utilized for precise manipulation of micron-sized particles and biological cells. The patterns that have been produced with this method, however, have been limited to straight lines and grids from flat channel walls, and where the spacing resulting from this interference has not previously been comprehensively explored. In this work we examine the interaction between both straight and curved channel interfaces with a SAW to derive geometrically deduced analytical models. These models predict the acoustic force-field periodicity near a channel interface as a function of its orientation to an underlying SAW, and are validated with experimental and simulation results. Notably, the spacing is larger for flat walls than for curved ones and is dependent on the ratio of sound speeds in the substrate and fluid. Generating these force-field gradients with only travelling waves has wide applications in acoustofluidic systems, where channel interfaces can potentially support a range of patterning, concentration, focusing and separation activities by creating locally defined acoustic forces.
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Affiliation(s)
- David J Collins
- Department of Biomedical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia.
| | - Richard O'Rorke
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore.
| | - Adrian Neild
- Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC 3800, Australia
| | - Jongyoon Han
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA and Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ye Ai
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore.
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Afzal M, Park J, Destgeer G, Ahmed H, Iqrar SA, Kim S, Kang S, Alazzam A, Yoon TS, Sung HJ. Acoustomicrofluidic separation of tardigrades from raw cultures for sample preparation. Zool J Linn Soc 2019. [DOI: 10.1093/zoolinnean/zlz079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Abstract
Tardigrades are microscopic animals widely known for their ability to survive in extreme conditions. They are the focus of current research in the fields of taxonomy, biogeography, genomics, proteomics, development, space biology, evolution and ecology. Tardigrades, such as Hypsibius exemplaris, are being advocated as a next-generation model organism for genomic and developmental studies. The raw culture of H. exemplaris usually contains tardigrades themselves, their eggs, faeces and algal food. Experimentation with tardigrades often requires the demanding and laborious separation of tardigrades from raw samples to prepare pure and contamination-free tardigrade samples. In this paper, we propose a two-step acoustomicrofluidic separation method to isolate tardigrades from raw samples. In the first step, a passive microfluidic filter composed of an array of traps is used to remove large algal clusters in the raw sample. In the second step, a surface acoustic wave-based active microfluidic separation device is used to deflect tardigrades continuously from their original streamlines inside the microchannel and thus isolate them selectively from algae and eggs. The experimental results demonstrated the efficient separation of tardigrades, with a recovery rate of 96% and an impurity of 4% algae on average in a continuous, contactless, automated, rapid and biocompatible manner.
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Affiliation(s)
- Muhammad Afzal
- Department of Mechanical Engineering, KAIST, Daejeon 34141, Korea
| | - Jinsoo Park
- Department of Mechanical Engineering, KAIST, Daejeon 34141, Korea
| | - Ghulam Destgeer
- Department of Mechanical Engineering, KAIST, Daejeon 34141, Korea
| | - Husnain Ahmed
- Department of Mechanical Engineering, KAIST, Daejeon 34141, Korea
| | - Syed Atif Iqrar
- Department of Mechanical Engineering, KAIST, Daejeon 34141, Korea
| | - Sanghee Kim
- Division of Polar Life Sciences, KOPRI, Incheon 21990, Korea
| | - Sunghyun Kang
- Department of Proteome Structural Biology, KRIBB, Daejeon 34141, Korea
| | - Anas Alazzam
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi 127788, United Arab Emirates
| | - Tae-Sung Yoon
- Department of Proteome Structural Biology, KRIBB, Daejeon 34141, Korea
| | - Hyung Jin Sung
- Department of Mechanical Engineering, KAIST, Daejeon 34141, Korea
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Ashtiani D, de Marco A, Neild A. Tailoring surface acoustic wave atomisation for cryo-electron microscopy sample preparation. LAB ON A CHIP 2019; 19:1378-1385. [PMID: 30869091 DOI: 10.1039/c8lc01347k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Surface acoustic wave (SAW) atomisation has been widely explored for use in pharmacological delivery, hence performance is characterised predominately in terms of droplet size and maximum delivery of fluid, to ensure sufficient dosage is delivered to the right location. For the application of cryo electron microscopy grid preparation, however, what is required is the transfer of very little fluid onto the grid in a well-defined manner. To meet this requirement, the analysis of SAW atomisation needs to focus on very different characteristics. Specifically, we examine the aerosol jet geometry, in terms of width, cone angle, and elevation angle, and its stability at low power, and hence low flow rates. The variables used are the width and the location of the channel delivering the fluid to the site of atomization. From the experiments, it is observed that we can reach a flowrate as low as 0.55 μl s-1 with reasonable aerosol jet stability, a jet width of 0.5 mm wide and an elevation angle variation as low as 2°.
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Affiliation(s)
- Dariush Ashtiani
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria, Australia.
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Destgeer G, Hashmi A, Park J, Ahmed H, Afzal M, Sung HJ. Microparticle self-assembly induced by travelling surface acoustic waves. RSC Adv 2019; 9:7916-7921. [PMID: 35521193 PMCID: PMC9061445 DOI: 10.1039/c8ra09859j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/05/2019] [Indexed: 01/04/2023] Open
Abstract
We present an acoustofluidic method based on travelling surface acoustic waves (TSAWs) to induce self-assembly of microparticles inside a microfluidic channel. The particles are trapped above an interdigitated transducer, placed directly beneath the microchannel, by the TSAW-based direct acoustic radiation force (ARF). This approach was applied to trap 10 μm polystyrene particles, which were pushed towards the ceiling of the microchannel by 72 MHz TSAWs to form single- and multiple-layer colloidal structures. The repair of cracks and defects within the crystal lattice occurs as part of the self-assembly process. The sample flow through the first inlet can be switched with a buffer flow through the second inlet to control the number of particles assembled in the crystalline structure. The constant flow-induced Stokes drag force on the particles is balanced by the opposing TSAW-based ARF. This force balance is essential for the acoustics-based self-assembly of microparticles inside the microchannel. Moreover, we studied the effects of varying input voltage and fluid flow rate on the position and shape of the colloidal structure. The active self-assembly of microparticles into crystals with multiple layers can be used in the bottom-up fabrication of colloidal structures with dimensions greater than 500 μm × 500 μm, which is expected to have important applications in various fields. We present an acoustofluidic method based on travelling surface acoustic waves (TSAWs) for the self-assembly of microparticles inside a microfluidic channel.![]()
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Affiliation(s)
| | - Ali Hashmi
- Institut de Biologie du Développement de Marseille (IBDM)
- France
| | - Jinsoo Park
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
| | - Husnain Ahmed
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
| | - Muhammad Afzal
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
| | - Hyung Jin Sung
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
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32
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Fakhfouri A, Devendran C, Ahmed A, Soria J, Neild A. The size dependant behaviour of particles driven by a travelling surface acoustic wave (TSAW). LAB ON A CHIP 2018; 18:3926-3938. [PMID: 30474095 DOI: 10.1039/c8lc01155a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The use of travelling surface acoustic waves (TSAW) in a microfluidic system provides a powerful tool for the manipulation of particles and cells. In a TSAW driven system, acoustophoretic effects can cause suspended micro-objects to display three distinct responses: (1) swirling, driven by acoustic streaming forces, (2) migration, driven by acoustic radiation forces and (3) patterning in a spatially periodic manner, resulting from diffraction effects. Whilst the first two phenomena have been widely discussed in the literature, the periodic patterning induced by TSAW has only recently been reported and is yet to be fully elucidated. In particular, more in-depth understanding of the size-dependant nature of this effect and the factors involved are required. Herein, we present an experimental and numerical study of the transition in acoustophoretic behaviour of particles influenced by relative dominance of these three mechanisms and characterise it based on particle diameter, channel height, frequency and intensity of the TSAW driven microfluidic system. This study will enable better understanding of the performance of TSAW sorters and allow the development of TSAW systems for particle collection and patterning.
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Affiliation(s)
- Armaghan Fakhfouri
- Laboratory for Micro Systems, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia.
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