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Zhang X, Son R, Lin YJ, Gill A, Chen S, Qi T, Choi D, Wen J, Lu Y, Lin NYC, Chiou PY. Rapid prototyping of functional acoustic devices using laser manufacturing. LAB ON A CHIP 2022; 22:4327-4334. [PMID: 36285690 PMCID: PMC10122935 DOI: 10.1039/d2lc00725h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Acoustic patterning of micro-particles has many important biomedical applications. However, fabrication of such microdevices is costly and labor-intensive. Among conventional fabrication methods, photo-lithography provides high resolution but is expensive and time consuming, and not ideal for rapid prototyping and testing for academic applications. In this work, we demonstrate a highly efficient method for rapid prototyping of acoustic patterning devices using laser manufacturing. With this method we can fabricate a newly designed functional acoustic device in 4 hours. The acoustic devices fabricated using this method can achieve sub-wavelength, complex and non-periodic patterning of microparticles and biological objects with a spatial resolution of 60 μm across a large active manipulation area of 10 × 10 mm2.
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Affiliation(s)
- Xiang Zhang
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, USA.
| | - Rosa Son
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, USA.
| | - Yen-Ju Lin
- Department of Electrical and Computer Engineering, University of California at Los Angeles, USA
| | - Alexi Gill
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, USA.
| | - Shilin Chen
- Department of Chemical and Biomolecular Engineering, University of California at Los Angeles, USA
- Department of Microbiology, Immunology and Molecular Genetics, David Geffen School of Medicine, University of California at Los Angeles, USA
| | - Tong Qi
- Department of Chemical and Biomolecular Engineering, University of California at Los Angeles, USA
- Department of Microbiology, Immunology and Molecular Genetics, David Geffen School of Medicine, University of California at Los Angeles, USA
| | - David Choi
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, USA.
| | - Jing Wen
- Department of Microbiology, Immunology and Molecular Genetics, David Geffen School of Medicine, University of California at Los Angeles, USA
| | - Yunfeng Lu
- Department of Chemical and Biomolecular Engineering, University of California at Los Angeles, USA
| | - Neil Y C Lin
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, USA.
- Department of Bioengineering, University of California at Los Angeles, USA
- Institute for Quantitative and Computational Biosciences, University of California at Los Angeles, USA
| | - Pei-Yu Chiou
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, USA.
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Measurement of the Thermal Effect of Standing Surface Acoustic Waves in Microchannel by Fluoresence Intensity. MICROMACHINES 2021; 12:mi12080934. [PMID: 34442556 PMCID: PMC8401515 DOI: 10.3390/mi12080934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 01/10/2023]
Abstract
Temperature is an important parameter for many medical and biological applications. It is key to measuring the temperature of acoustofluidics devices for controlling the device’s temperature. In this paper, Rhodamine B was used to measure the temperature change of the microchannel induced by the SSAWs’ thermal effect in microfluidics. A thermocouple was integrated into the microfluidics device to calibrate the relationship between the fluorescent intensity ratios of Rhodamine B and the temperature. Then, the fluid temperature in the microchannel heated by the SSAWs was measured by the fluorescent signal intensity ratio in the acoustofluidics device. The fluid temperature with different input voltages and different flow rates was measured. The results show that SSAWs can heat the still fluid rapidly to 80 °c, and the flow rates will influence the temperature of the fluid. The results will be useful for precisely controlling the temperature of acoustofluidics devices.
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Tung KW, Chung PS, Wu C, Man T, Tiwari S, Wu B, Chou YF, Yang FL, Chiou PY. Deep, sub-wavelength acoustic patterning of complex and non-periodic shapes on soft membranes supported by air cavities. LAB ON A CHIP 2019; 19:3714-3725. [PMID: 31584051 DOI: 10.1039/c9lc00612e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Arbitrary patterning of micro-objects in liquid is crucial to many biomedical applications. Among conventional methodologies, acoustic approaches provide superior biocompatibility but are intrinsically limited to producing periodic patterns at low resolution due to the nature of standing waves and the coupling between fluid and structure vibrations. This work demonstrates a near-field acoustic platform capable of synthesizing high resolution, complex and non-periodic energy potential wells. A thin and viscoelastic membrane is utilized to modulate the acoustic wavefront on a deep, sub-wavelength scale by suppressing the structural vibration selectively on the platform. Using 3 MHz excitation (λ∼ 500 μm in water), we have experimentally validated such a concept by realizing patterning of microparticles and cells with a line resolution of 50 μm (one tenth of the wavelength). Furthermore, massively parallel patterning across a 3 × 3 mm2 area has been achieved. This new acoustic wavefront modulation mechanism is powerful for manufacturing complex biologic products.
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Affiliation(s)
- Kuan-Wen Tung
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA.
| | - Pei-Shan Chung
- Department of Bioengineering, University of California at Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Cong Wu
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Ave, Kowloon Tong, Hong Kong
| | - Tianxing Man
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA.
| | - Sidhant Tiwari
- Department of Electrical and Computer Engineering, University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Ben Wu
- Department of Bioengineering, University of California at Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA and Department of Materials Science and Engineering, University of California at Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA and Division of Advanced Prosthodontics, School of Dentistry, University of California at Los Angeles, 714 Tiverton Ave, Los Angeles, CA 90024, USA and Department of Orthopedic Surgery, School of Medicine, University of California at Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90095, USA
| | - Yuan-Fang Chou
- Department of Mechanical and Aerospace Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Rd, Da'an District, Taipei City, 10617, Taiwan
| | - Fu-Ling Yang
- Department of Mechanical and Aerospace Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Rd, Da'an District, Taipei City, 10617, Taiwan
| | - Pei-Yu Chiou
- Department of Mechanical and Aerospace Engineering, University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA. and Department of Bioengineering, University of California at Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
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Tay A, Kunze A, Murray C, Di Carlo D. Induction of Calcium Influx in Cortical Neural Networks by Nanomagnetic Forces. ACS NANO 2016; 10:2331-41. [PMID: 26805612 DOI: 10.1021/acsnano.5b07118] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Nanomagnetic force stimulation with ferromagnetic nanoparticles was found to trigger calcium influx in cortical neural networks without observable cytotoxicity. Stimulated neural networks showed an average of 20% increment in calcium fluorescence signals and a heightened frequency in calcium spiking. These effects were also confined spatially to areas with engineered high magnetic field gradients. Furthermore, blockage of N-type calcium channels inhibited the stimulatory effects of the nanomagnetic forces, suggesting the role of mechano-sensitive ion channels in mediating calcium influx.
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Affiliation(s)
- Andy Tay
- Department of Bioengineering, ‡California Nanosystems Institute, and §Jonsson Comprehensive Cancer Center, University of California , Los Angeles, California 90025, United States
| | - Anja Kunze
- Department of Bioengineering, ‡California Nanosystems Institute, and §Jonsson Comprehensive Cancer Center, University of California , Los Angeles, California 90025, United States
| | - Coleman Murray
- Department of Bioengineering, ‡California Nanosystems Institute, and §Jonsson Comprehensive Cancer Center, University of California , Los Angeles, California 90025, United States
| | - Dino Di Carlo
- Department of Bioengineering, ‡California Nanosystems Institute, and §Jonsson Comprehensive Cancer Center, University of California , Los Angeles, California 90025, United States
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