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Rubio LD, Collins M, Sen A, Aranson IS. Ultrasound Manipulation and Extrusion of Active Nanorods. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2300028. [PMID: 37246278 DOI: 10.1002/smll.202300028] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 04/20/2023] [Indexed: 05/30/2023]
Abstract
Synthetic self-propelled nano and microparticles have a growing appeal for targeted drug delivery, collective functionality, and manipulation at the nanoscale. However, it is challenging to control their positions and orientations under confinement, e.g., in microchannels, nozzles, and microcapillaries. This study reports on the synergistic effect of acoustic and flow-induced focusing in microfluidic nozzles. In a microchannel with a nozzle, the balance between the acoustophoretic forces and the fluid drag due to streaming flows generated by the acoustic field controls the microparticle's dynamics. This study manipulates the positions and orientations of dispersed particles and dense clusters inside the channel at a fixed frequency by tuning the acoustic intensity. The main findings are: first, this study successfully manipulates the positions and orientations of individual particles and dense clusters inside the channel at a fixed frequency by tuning the acoustic intensity. Second, when an external flow is applied, the acoustic field separates and selectively extrudes shape-anisotropic passive particles and self-propelled active nanorods. Finally, the observed phenomena are explained by multiphysics finite-element modeling. The results shed light on the control and extrusion of active particles in confined geometries and enable applications for acoustic cargo (e.g., drug) delivery, particle injection, and additive manufacturing via printed self-propelled active particles.
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Affiliation(s)
- Leonardo Dominguez Rubio
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 18602, USA
| | - Matthew Collins
- Department of Chemistry, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Ayusman Sen
- Department of Chemistry, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Igor S Aranson
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 18602, USA
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2
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Pan H, Mei D, Xu C, Li X, Wang Y. Acoustic tweezers using bisymmetric coherent surface acoustic waves for dynamic and reconfigurable manipulation of particle multimers. J Colloid Interface Sci 2023; 643:115-123. [PMID: 37058887 DOI: 10.1016/j.jcis.2023.04.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/02/2023] [Accepted: 04/05/2023] [Indexed: 04/16/2023]
Abstract
HYPOTHESIS The accurate and dynamic manipulation of multiple micro-sized objects has always been a technical challenge in areas of colloid assembly, tissue engineering, and organ regeneration. The hypothesis of this paper is the precise modulation and parallel manipulation of morphology of individual and multiple colloidal multimers can be achieved by customizing acoustic field. EXPERIMENTS Herein, we present a colloidal multimer manipulation method by using acoustic tweezers with bisymmetric coherent surface acoustic waves (SAWs), which enables contactless morphology modulation of individual colloidal multimers and patterning arrays by regulating the shape of acoustic field to specific desired distributions with high accuracy. Rapid switching of multimer patterning arrays, morphology modulation of individual multimers, and controllable rotation can be achieved by regulating coherent wave vector configurations and phase relations in real time. FINDINGS To demonstrate the capabilities of this technology, we have firstly achieved eleven patterns of deterministic morphology switching for single hexamer and precise switching between three array modes. In addition, the assembly of multimers with three kinds of specific widths and controllable rotation of single multimers and arrays were demonstrated from 0 to 22.4 rpm (tetramers). Therefore, this technique enables reversible assembly and dynamic manipulation of particles and/or cells in colloid synthesis applications.
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Affiliation(s)
- Hemin Pan
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Deqing Mei
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chengyao Xu
- Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xin Li
- Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yancheng Wang
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China.
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Vachon P, Merugu S, Sharma J, Lal A, Ng EJ, Koh Y, Lee JEY, Lee C. Microfabricated acoustofluidic membrane acoustic waveguide actuator for highly localized in-droplet dynamic particle manipulation. LAB ON A CHIP 2023; 23:1865-1878. [PMID: 36852544 DOI: 10.1039/d2lc01192a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Precision manipulation techniques in microfluidics often rely on ultrasonic actuators to generate displacement and pressure fields in a liquid. However, strategies to enhance and confine the acoustofluidic forces often work against miniaturization and reproducibility in fabrication. This study presents microfabricated piezoelectric thin film membranes made via silicon diffusion for guided flexural wave generation as promising acoustofluidic actuators with low frequency, voltage, and power requirements. The guided wave propagation can be dynamically controlled to tune and confine the induced acoustofluidic radiation force and streaming. This provides for highly localized dynamic particle manipulation functionalities such as multidirectional transport, patterning, and trapping. The device combines the advantages of microfabrication and advanced acoustofluidic capabilities into a miniature "drop-and-actuate" chip that is mechanically robust and features a high degree of reproducibility for large-scale production. The membrane acoustic waveguide actuators offer a promising pathway for acoustofluidic applications such as biosensing, organoid production, and in situ analyte transport.
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Affiliation(s)
- Philippe Vachon
- Institute of Microelectronics, A*STAR, Singapore
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore.
| | | | | | - Amit Lal
- Institute of Microelectronics, A*STAR, Singapore
- SonicMEMS Laboratory, School of Electrical and Computer Engineering, Cornell University, Ithaca, USA
| | - Eldwin J Ng
- Institute of Microelectronics, A*STAR, Singapore
| | - Yul Koh
- Institute of Microelectronics, A*STAR, Singapore
| | | | - Chengkuo Lee
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore.
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Yadav AS, Tran DT, Teo AJT, Dai Y, Galogahi FM, Ooi CH, Nguyen NT. Core-Shell Particles: From Fabrication Methods to Diverse Manipulation Techniques. MICROMACHINES 2023; 14:497. [PMID: 36984904 PMCID: PMC10054063 DOI: 10.3390/mi14030497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Core-shell particles are micro- or nanoparticles with solid, liquid, or gas cores encapsulated by protective solid shells. The unique composition of core and shell materials imparts smart properties on the particles. Core-shell particles are gaining increasing attention as tuneable and versatile carriers for pharmaceutical and biomedical applications including targeted drug delivery, controlled drug release, and biosensing. This review provides an overview of fabrication methods for core-shell particles followed by a brief discussion of their application and a detailed analysis of their manipulation including assembly, sorting, and triggered release. We compile current methodologies employed for manipulation of core-shell particles and demonstrate how existing methods of assembly and sorting micro/nanospheres can be adopted or modified for core-shell particles. Various triggered release approaches for diagnostics and drug delivery are also discussed in detail.
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Affiliation(s)
- Ajeet Singh Yadav
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Du Tuan Tran
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Adrian J. T. Teo
- HP-NTU Digital Manufacturing Corporate Lab, Nanyang Technological University, Singapore 637460, Singapore
| | - Yuchen Dai
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Fariba Malekpour Galogahi
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Chin Hong Ooi
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
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5
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Qiu H, Wang H, Yang X, Huo F. High performance isolation of circulating tumor cells by acoustofluidic chip coupled with ultrasonic concentrated energy transducer. Colloids Surf B Biointerfaces 2023; 222:113138. [PMID: 36638753 DOI: 10.1016/j.colsurfb.2023.113138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 01/02/2023] [Accepted: 01/07/2023] [Indexed: 01/11/2023]
Abstract
The isolation of circulating tumor cells (CTCs) from whole blood is a challenging task. Although various studies on the separation of CTCs by acoustofluidic devices have been reported, difficulties still persist, such as the complicated equipment, high cost, and difficult operation. Those problems should be resolved urgently. Herein, we developed an acoustofluidic chip separation system coupled with an ultrasonic concentrated energy transducer (UCET) system for efficient separation of CTCs. In the separation system, the acoustically sensitive particles were pre-focused by inertial forces of the PDMS chip channel structure. Then, the particles with different sizes were separated by acoustic radiation forces (ARF). In this study, the circulating tumor cells was simulated (CTCs-like particles) by aminated mesoporous acoustically sensitive particles (MSN@AM) encapsulated carboxylate polystyrene microspheres (PS-COOH). Subsequently, efficient CTCs-like particles separation was achieved by the acoustofluidic chip coupling system. This study effectively separated polystyrene microspheres carrying acoustically sensitive particles (MSN@AM@PS-COOH). However, the MSNs agglomerates and PS microspheres without acoustically sensitive particles did not show phenomenon of separation. This method allows to efficiently separate 2 µm MSNs agglomerates,8.0-8.9 µm PS microspheres and 10-10.5 µm MSN@AM@PS-COOH particles. It is demonstrated that the CTCs-like particles show more sensitive response, longer moving distance, and more obvious separation effect at the condition of the low frequency traveling wave sound field (20 kHz from UCET). This system can maintain the same separation with reduced amount of reagents used for cancer detection. It may provide a reliable basis for sorting out CTCs efficiently from the whole blood of cancer patients.
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Affiliation(s)
- Hui Qiu
- Analytical Testing Center, Institute of Micro&Nano Intelligent Sensing, Neijiang Normal University, Neijiang 641100, PR China; School of Mechanical Engineering, Chengdu University, Chengdu 610106 Sichuan, PR China
| | - Haoyu Wang
- Analytical Testing Center, Institute of Micro&Nano Intelligent Sensing, Neijiang Normal University, Neijiang 641100, PR China; School of Mechanical Engineering, Chengdu University, Chengdu 610106 Sichuan, PR China
| | - Xiupei Yang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, PR China
| | - Feng Huo
- Analytical Testing Center, Institute of Micro&Nano Intelligent Sensing, Neijiang Normal University, Neijiang 641100, PR China; School of Mechanical Engineering, Chengdu University, Chengdu 610106 Sichuan, PR China.
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A Perturbed Asymmetrical Y-TypeSheathless Chip for Particle Control Based on Adjustable Tilted-Angle Traveling Surface Acoustic Waves (ataTSAWs). BIOSENSORS 2022; 12:bios12080611. [PMID: 36005007 PMCID: PMC9406206 DOI: 10.3390/bios12080611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/01/2022] [Accepted: 08/06/2022] [Indexed: 11/17/2022]
Abstract
The precise control of target particles (20 µm) at different inclination angles θi is achieved by combining a perturbed asymmetric sheathless Y-type microchannel and a digital transducer (IDT). The offset single-row micropillar array with the buffer area can not only concentrate large and small particles in a fixed region of the flow channel, but also avoid the large deflection of some small particles at the end of the array. The addition of the buffer area can effectively improve the separation purity of the chip. By exploring the manufacturing process of the microchannel substrate, an adjustable tilted-angle scheme is proposed. The use of ataTSAW makes the acoustic field area in the microchannel have no corner effect region. Through experiments, when the signal source frequency was 33.6 MHz, and the flow rate was 20 µL/min, our designed chip could capture 20 µm particles when θi = 5°. The deflection of 20 µm particles can be realized when θi = 15°–45°. The precise dynamic separation of 20 µm particles can be achieved when θi = 25°–45°, and the separation purity and efficiency were 97% and 100%, respectively.
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Abstract
Intuitive self-assembly devices are of great significance to the emerging applications of self-assembly theory. In this paper, a novel intuitive device with an aerodynamic system is fabricated for the self-assembly experiment. Table tennis balls were used as the objects to be assembled during the self-assembly process. To understand more about the system, two experiments were designed—the directed assembly experiment was conducted to organize a specific structure and to explore the influences of environmental variables, and the indirect assembly experiment repeated with the “bottom-up” self-organization process and expressed the characteristics of “the optimization” and “the emergence” in the self-organization process. This article expressed a novel self-assembly approach at a macroscale and created a new choice or idea for the structural design and the optimization method.
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Wang Z, Rich J, Hao N, Gu Y, Chen C, Yang S, Zhang P, Huang TJ. Acoustofluidics for simultaneous nanoparticle-based drug loading and exosome encapsulation. MICROSYSTEMS & NANOENGINEERING 2022; 8:45. [PMID: 35498337 PMCID: PMC9051122 DOI: 10.1038/s41378-022-00374-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 02/15/2022] [Accepted: 03/07/2022] [Indexed: 05/08/2023]
Abstract
Nanocarrier and exosome encapsulation has been found to significantly increase the efficacy of targeted drug delivery while also minimizing unwanted side effects. However, the development of exosome-encapsulated drug nanocarriers is limited by low drug loading efficiencies and/or complex, time-consuming drug loading processes. Herein, we have developed an acoustofluidic device that simultaneously performs both drug loading and exosome encapsulation. By synergistically leveraging the acoustic radiation force, acoustic microstreaming, and shear stresses in a rotating droplet, the concentration, and fusion of exosomes, drugs, and porous silica nanoparticles is achieved. The final product consists of drug-loaded silica nanocarriers that are encased within an exosomal membrane. The drug loading efficiency is significantly improved, with nearly 30% of the free drug (e.g., doxorubicin) molecules loaded into the nanocarriers. Furthermore, this acoustofluidic drug loading system circumvents the need for complex chemical modification, allowing drug loading and encapsulation to be completed within a matter of minutes. These exosome-encapsulated nanocarriers exhibit excellent efficiency in intracellular transport and are capable of significantly inhibiting tumor cell proliferation. By utilizing physical forces to rapidly generate hybrid nanocarriers, this acoustofluidic drug loading platform wields the potential to significantly impact innovation in both drug delivery research and applications.
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Affiliation(s)
- Zeyu Wang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Joseph Rich
- Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
| | - Nanjing Hao
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Yuyang Gu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Chuyi Chen
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Shujie Yang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Peiran Zhang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
| | - Tony Jun Huang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA
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9
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Ozcelik A, Aslan Z. A simple acoustofluidic device for on-chip fabrication of PLGA nanoparticles. BIOMICROFLUIDICS 2022; 16:014103. [PMID: 35154554 PMCID: PMC8816518 DOI: 10.1063/5.0081769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 01/24/2022] [Indexed: 05/03/2023]
Abstract
Miniaturization of systems and processes provides numerous benefits in terms of cost, reproducibility, precision, minimized consumption of chemical reagents, and prevention of contamination. The field of microfluidics successfully finds a place in a plethora of applications, including on-chip nanoparticle synthesis. Compared with the bulk approaches, on-chip methods that are enabled by microfluidic devices offer better control of size and uniformity of fabricated nanoparticles. However, these microfluidic devices generally require complex and expensive fabrication facilities that are not readily available in low-resourced laboratories. Here, a low-cost and simple acoustic device is demonstrated by generating acoustic streaming flows inside glass capillaries through exciting different flexural modes. At distinct frequencies, the flexural modes of the capillary result in different oscillation profiles that can insert harmonic forcing into the fluid. We explored these flexural modes and identified the modes that can generate strong acoustic streaming vortices along the glass capillary. Then, we applied these modes for fluid mixing using an easy-to-fabricate acoustofluidic device architecture. This device is applied in the fabrication of poly(d,l-lactide-co-glycolide) (PLGA) nanoparticles. The acoustic device consists of a thin glass capillary and two polydimethylsiloxane adaptors that are formed using three-dimensional printed molds. By controlling the flow rates of the polymer and water solutions, PLGA nanoparticles with diameters between 65 and 96 nm are achieved with polydispersity index values ranging between 0.08 and 0.18. Owing to its simple design and minimal fabrication requirements, the proposed acoustofluidic mixer can be applied for microfluidic fluid mixing applications in limited resource settings.
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Affiliation(s)
- Adem Ozcelik
- Author to whom correspondence should be addressed:
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10
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Kolesnik K, Xu M, Lee PVS, Rajagopal V, Collins DJ. Unconventional acoustic approaches for localized and designed micromanipulation. LAB ON A CHIP 2021; 21:2837-2856. [PMID: 34268539 DOI: 10.1039/d1lc00378j] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Acoustic fields are ideal for micromanipulation, being biocompatible and with force gradients approaching the scale of single cells. They have accordingly found use in a variety of microfluidic devices, including for microscale patterning, separation, and mixing. The bulk of work in acoustofluidics has been predicated on the formation of standing waves that form periodic nodal positions along which suspended particles and cells are aligned. An evolving range of applications, however, requires more targeted micromanipulation to create unique patterns and effects. To this end, recent work has made important advances in improving the flexibility with which acoustic fields can be applied, impressively demonstrating generating arbitrary arrangements of pressure fields, spatially localizing acoustic fields and selectively translating individual particles in ways that are not achievable via traditional approaches. In this critical review we categorize and examine these advances, each of which open the door to a wide range of applications in which single-cell fidelity and flexible micromanipulation are advantageous, including for tissue engineering, diagnostic devices, high-throughput sorting and microfabrication.
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Affiliation(s)
- Kirill Kolesnik
- Department of Biomedical Engineering, University of Melbourne, Melbourne, Victoria, Australia.
| | - 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.
| | - Vijay Rajagopal
- 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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Khalesi Moghaddam R, Bhalla N, Q Shen A, Natale G. Deterministic particle assembly on nanophotonic chips. J Colloid Interface Sci 2021; 603:259-269. [PMID: 34214719 DOI: 10.1016/j.jcis.2021.06.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/14/2021] [Accepted: 06/20/2021] [Indexed: 10/21/2022]
Abstract
HYPOTHESIS Controlled particle assembly from a dilute suspension droplet is challenging yet important for many lab-on-a-chip and biosensing applications. The formation of hot spots on the localized surface plasmonic resonance (LSPR) substrates induced by laser excitation can generate microbubbles. These microbubbles, upon the laser removal, shrink and collapse due to electron energy dissipation, leading to guided particle assembly on the LSPR substrate. EXPERIMENTS After depositing dilute silica particles dispersions on both nanoisland (AuNI) and planar gold (Au) plasmonic substrates (referred to as LSPR and SPR substrates respectively), microbubbles were formed when a laser beam was applied. Particle dispersion concentration, laser power, and the radius of circular laser sequence were varied to produce different sizes of particle clusters on the LSPR substrate after bubble shrinkage upon the laser removal. To stabilize the assembled structures over time, sodium chloride (NaCl) was ad ded to the dispersions. FINDINGS Even though thermo-plasmonic flow and microbubbles can be produced with SPR substrates, particle assembly is only possible on LSPR substrates because of electron energy dissipation via nanoscale air gaps trapped in the LSPR substrate. By tuning the laser power, the radius of the circular laser sequence, and the particle dispersion concentration, the number of particles in the assembled structure can be controlled. The addition of NaCl to the dispersion can screen the electrostatic charges among the particles and between the particles and substrate, favoring hydrogen bonding and stabilizing the assembled structures for hours. These findings establish a new framework for utilizing nanophotonic chips where particle assembly can be achieved by a single source of light.
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Affiliation(s)
- Razie Khalesi Moghaddam
- Department of Chemical & Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary T2N 1N4, Alberta, Canada
| | - Nikhil Bhalla
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, Shore Road, BT37 0QB Jordanstown, Northern Ireland, United Kingdom; Heathcare Technology Hub, Ulster University, BT37 0QB Jordanstown, Northern Ireland, United Kingdom
| | - Amy Q Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Giovanniantonio Natale
- Department of Chemical & Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary T2N 1N4, Alberta, Canada.
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Tang T, Dong B, Huang L. Agglomeration of particles by a converging ultrasound field and their quantitative assessments. ULTRASONICS SONOCHEMISTRY 2021; 75:105590. [PMID: 34023590 PMCID: PMC8165450 DOI: 10.1016/j.ultsonch.2021.105590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/09/2021] [Accepted: 05/13/2021] [Indexed: 05/07/2023]
Abstract
The acoustic radiation force resulting from acoustic waves have been extensively studied for the contact-free generation of organized patterning arrays. The precise arrangement of microscopic objects clustered at the pressure nodes is critical to the development of functional structures and patterned surfaces. However, the size of the clusters is restricted by the saturation limit of the acoustic nodes. Here, we present a bulk acoustic wave (BAW) platform, which employs a two-dimensional acoustic wave to propel particles of various sizes. Experimentally, when particles are large, significant acoustic energy is scattered and partly absorbed by the matched layers in front of the sensors. The acoustic radiation force from a convergent acoustic pressure field agglomerates the large polystyrene (PS) particles towards the central region instead of the pressure nodes. The parametric analysis has been performed to assess the transition in the particles from clustering at the organized nodal arrays to agglomerating in the central region, which is a function of particle size, particle concentration, and load voltage. Statistically, the particles can agglomerate with a cluster ratio greater than 70%, and this ratio can be improved by increasing the load power/voltage supplied to the transducers. With its ability to perform biocompatible, label-free, and contact-free self-assembly, this concept offers a new possibility in the fabrication of colloidal layers, the recreation of tissue microstructure, the development of organoid spheroid cultures, the migration of microorganisms, and the assembly of bioprinting materials.
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Affiliation(s)
- Tianquan Tang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR, China; Lab for Aerodynamics and Acoustics, HKU Zhejiang Institute of Research and Innovation, 1623 Dayuan Road, Lin An District, Hangzhou, China.
| | - Bin Dong
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR, China; Lab for Aerodynamics and Acoustics, HKU Zhejiang Institute of Research and Innovation, 1623 Dayuan Road, Lin An District, Hangzhou, China
| | - Lixi Huang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR, China; Lab for Aerodynamics and Acoustics, HKU Zhejiang Institute of Research and Innovation, 1623 Dayuan Road, Lin An District, Hangzhou, China
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13
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Afzal M, Park J, Jeon JS, Akmal M, Yoon TS, Sung HJ. Acoustofluidic Separation of Proteins Using Aptamer-Functionalized Microparticles. Anal Chem 2021; 93:8309-8317. [PMID: 34075739 DOI: 10.1021/acs.analchem.1c01198] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We propose an acoustofluidic method for the triseparation of proteins conjugated with aptamer-coated microparticles inside a microchannel. Traveling surface acoustic waves (TSAWs) produced from a slanted-finger interdigital transducer (SFIT) are used to separate the protein-loaded microparticles of different sizes via the TSAW-driven acoustic radiation force (ARF). The acoustofluidic device consists of an SFIT deposited onto a piezoelectric lithium niobate substrate and a polydimethylsiloxane (PDMS) microfluidic channel on top of the substrate. The TSAWs propagating on the substrate penetrate into the sample fluid flow, where the human protein-conjugated microparticles are suspended, inside the PDMS microchannel. The microparticles are subjected to the TSAW-driven ARF with varying magnitude depending on their size and thus flow along different streamlines, leading to triseparation of the proteins. In this work, we used two different-sized streptavidin-functionalized polystyrene (PS) microparticles to capture two kinds of aptamers (apt15 and aptD17.4), which were labeled with a respective biotin molecule at one end. The biotin ends of the aptamers were attached to the microparticles through streptavidin-biotin linkage, whereas the free ends of the aptamers were used to capture their target proteins of thrombin (th) and immunoglobulin E (IgE). The resultant PS-apt15-th and PS-aptD17.4-IgE complexes, as well as mCardinal2, were used for experimental demonstration of acoustofluidic triseparation of the human proteins. We achieved simultaneous separation of proteins of three kinds (th, IgE, and mCardinal2) for the first time via the TSAW-driven ARF in the proposed acoustofluidic device.
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Affiliation(s)
- Muhammad Afzal
- Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Jinsoo Park
- School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Jessie S Jeon
- Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Muhammad Akmal
- Department of Materials Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Tae-Sung Yoon
- Department of Proteome Structural Biology, KRIBB, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea
| | - Hyung Jin Sung
- Department of Mechanical Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
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14
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Liu P, Tian Z, Hao N, Bachman H, Zhang P, Hu J, Huang TJ. Acoustofluidic multi-well plates for enrichment of micro/nano particles and cells. LAB ON A CHIP 2020; 20:3399-3409. [PMID: 32779677 PMCID: PMC7494569 DOI: 10.1039/d0lc00378f] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Controllable enrichment of micro/nanoscale objects plays a significant role in many biomedical and biochemical applications, such as increasing the detection sensitivity of assays, or improving the structures of bio-engineered tissues. However, few techniques can perform concentrations of micro/nano objects in multi-well plates, a very common laboratory vessel. In this work, we develop an acoustofluidic multi-well plate, which adopts an array of simple, low-cost and commercially available ring-shaped piezoelectric transducers for rapid and robust enrichment of micro/nanoscale particles/cells in each well of the plate. The enrichment mechanism is validated and characterized through both numerical simulations and experiments. We observe that the ring-shaped piezoelectric transducer can generate circular standing flexural waves in the substrate of each well, and that the vibrations can induce acoustic streaming near the interface between the substrate and a fluid droplet placed within the well; this streaming can drive micro/nanoscale objects to the center of the droplet for enrichment. Moreover, the acoustofluidic multi-well plate can realize simultaneous and consistent enrichment of biological cells in each well of the plate. With merits such as simplicity, controllability, low cost, and excellent compatibility with other downstream analysis tools, the developed acoustofluidic multi-well plate could be a versatile tool for many applications such as micro/nano fabrication, self-assembly, biomedical/biochemical sensing, and tissue engineering.
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Affiliation(s)
- Pengzhan Liu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
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15
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Gao Y, Nyande BW, Lakerveld R. Open-loop control of directed self-assembly of colloidal particles in a microfluidic device. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2020.106837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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16
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Xiong S, Liu X, Zhou J, Liu Y, Shen Y, Yin X, Wu J, Tao R, Fu Y, Duan H. Stability studies of ZnO and AlN thin film acoustic wave devices in acid and alkali harsh environments. RSC Adv 2020; 10:19178-19184. [PMID: 35515426 PMCID: PMC9054069 DOI: 10.1039/d0ra02448a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/11/2020] [Indexed: 11/21/2022] Open
Abstract
Surface acoustic wave (SAW) devices based on piezoelectric thin-films such as ZnO and AlN are widely used in sensing, microfluidics and lab-on-a-chip applications. However, for many of these applications, the SAW devices will inevitably be used in acid or alkali harsh environments, which may cause their early failures. In this work, we investigated the behavior and degradation mechanisms of thin film based SAW devices in acid and alkali harsh environments. Results show that under the acid and alkali attacks, chemical reaction and corrosion of ZnO devices are very fast (usually within 45 s). During the corrosion, the crystalline orientation of the ZnO film is not changed, but its grain defects are significantly increased and the grain sizes are decreased. The velocity of ZnO-based SAW devices is decreased due to the formation of porous structures induced by the chemical reactions. Whereas an AlN thin-film based SAW device does not perform well in acid–alkali conditions, it might be able to maintain a normal performance without obvious degradation for more than ten hours in acid or alkali solutions. This work could provide guidance for the applications of both ZnO or AlN-based SAW devices in acid/alkali harsh environments. Surface acoustic wave (SAW) devices based on piezoelectric thin-films such as ZnO and AlN are widely used in sensing, microfluidics and lab-on-a-chip applications.![]()
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17
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Rezk AR, Ahmed H, Ramesan S, Yeo LY. High Frequency Sonoprocessing: A New Field of Cavitation-Free Acoustic Materials Synthesis, Processing, and Manipulation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 8:2001983. [PMID: 33437572 PMCID: PMC7788597 DOI: 10.1002/advs.202001983] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/17/2020] [Indexed: 04/14/2023]
Abstract
Ultrasound constitutes a powerful means for materials processing. Similarly, a new field has emerged demonstrating the possibility for harnessing sound energy sources at considerably higher frequencies (10 MHz to 1 GHz) compared to conventional ultrasound (⩽3 MHz) for synthesizing and manipulating a variety of bulk, nanoscale, and biological materials. At these frequencies and the typical acoustic intensities employed, cavitation-which underpins most sonochemical or, more broadly, ultrasound-mediated processes-is largely absent, suggesting that altogether fundamentally different mechanisms are at play. Examples include the crystallization of novel morphologies or highly oriented structures; exfoliation of 2D quantum dots and nanosheets; polymer nanoparticle synthesis and encapsulation; and the possibility for manipulating the bandgap of 2D semiconducting materials or the lipid structure that makes up the cell membrane, the latter resulting in the ability to enhance intracellular molecular uptake. These fascinating examples reveal how the highly nonlinear electromechanical coupling associated with such high-frequency surface vibration gives rise to a variety of static and dynamic charge generation and transfer effects, in addition to molecular ordering, polarization, and assembly-remarkably, given the vast dimensional separation between the acoustic wavelength and characteristic molecular length scales, or between the MHz-order excitation frequencies and typical THz-order molecular vibration frequencies.
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Affiliation(s)
- Amgad R. Rezk
- Micro/Nanophysics Research LaboratorySchool of EngineeringRMIT UniversityMelbourneVIC3000Australia
| | - Heba Ahmed
- Micro/Nanophysics Research LaboratorySchool of EngineeringRMIT UniversityMelbourneVIC3000Australia
| | - Shwathy Ramesan
- Micro/Nanophysics Research LaboratorySchool of EngineeringRMIT UniversityMelbourneVIC3000Australia
| | - Leslie Y. Yeo
- Micro/Nanophysics Research LaboratorySchool of EngineeringRMIT UniversityMelbourneVIC3000Australia
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18
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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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19
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Sehgal P, Ramaswamy M, Cohen I, Kirby BJ. Using Acoustic Perturbations to Dynamically Tune Shear Thickening in Colloidal Suspensions. PHYSICAL REVIEW LETTERS 2019; 123:128001. [PMID: 31633960 DOI: 10.1103/physrevlett.123.128001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Indexed: 06/10/2023]
Abstract
Colloidal suspensions in industrial processes often exhibit shear thickening that is difficult to control actively. Here, we use piezoelectric transducers to apply acoustic perturbations to dynamically tune the suspension viscosity in the shear-thickening regime. We attribute the mechanism of dethickening to the disruption of shear-induced force chains via perturbations that are large relative to the particle roughness scale. The ease with which this technique can be adapted to various flow geometries makes it a powerful tool for actively controlling suspension flow properties and investigating system dynamics.
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Affiliation(s)
- Prateek Sehgal
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Meera Ramaswamy
- Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - Itai Cohen
- Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - Brian J Kirby
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853, USA
- Department of Medicine, Division of Hematology and Medical Oncology, Weill-Cornell Medicine, New York, New York 10021,USA
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20
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Wang L, Wang J. Self-assembly of colloids based on microfluidics. NANOSCALE 2019; 11:16708-16722. [PMID: 31469374 DOI: 10.1039/c9nr06817a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Self-assembly of colloids provides a powerful way for the construction of complex multi-scale materials. Microfluidic techniques possess great potential to precisely control the assembly of micro- and nano-scale building blocks via the rational design of various microfluidic environments. In this review, we first discuss the self-assembly of colloids without templates by using the laminar microfluidic technique. The self-assembly of colloids based on a droplet as a template was subsequently summarized and discussed via droplet microfluidic technique. Moreover, the evaporation-driven self-assembly of colloids in microfluidic channels has been discussed and analysed. Finally, the representative applications in this field have been pointed out. The aim of this review is to summarize the state-of-art on the self-assembly of colloids based on various microfluidic techniques, exhibit their representative applications, and point out the current challenges in this field, hoping to inspire and guide future work.
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Affiliation(s)
- Lei Wang
- MIIT Key laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry & Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.
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