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Kato S, Carlson DW, Shen AQ, Guo Y. Twisted fiber microfluidics: a cutting-edge approach to 3D spiral devices. MICROSYSTEMS & NANOENGINEERING 2024; 10:14. [PMID: 38259519 PMCID: PMC10800335 DOI: 10.1038/s41378-023-00642-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/24/2023] [Accepted: 11/14/2023] [Indexed: 01/24/2024]
Abstract
The development of 3D spiral microfluidics has opened new avenues for leveraging inertial focusing to analyze small fluid volumes, thereby advancing research across chemical, physical, and biological disciplines. While traditional straight microchannels rely solely on inertial lift forces, the novel spiral geometry generates Dean drag forces, eliminating the necessity for external fields in fluid manipulation. Nevertheless, fabricating 3D spiral microfluidics remains a labor-intensive and costly endeavor, hindering its widespread adoption. Moreover, conventional lithographic methods primarily yield 2D planar devices, thereby limiting the selection of materials and geometrical configurations. To address these challenges, this work introduces a streamlined fabrication method for 3D spiral microfluidic devices, employing rotational force within a miniaturized thermal drawing process, termed as mini-rTDP. This innovation allows for rapid prototyping of twisted fiber-based microfluidics featuring versatility in material selection and heightened geometric intricacy. To validate the performance of these devices, we combined computational modeling with microtomographic particle image velocimetry (μTPIV) to comprehensively characterize the 3D flow dynamics. Our results corroborate the presence of a steady secondary flow, underscoring the effectiveness of our approach. Our 3D spiral microfluidics platform paves the way for exploring intricate microflow dynamics, with promising applications in areas such as drug delivery, diagnostics, and lab-on-a-chip systems.
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Affiliation(s)
- Shunsuke Kato
- Department of Electrical, Information and Physics Engineering, School of Engineering, Tohoku University, Aoba-ku, Sendai, 980-8579 Miyagi Japan
| | - Daniel W. Carlson
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology, Onna, Kunigami-gun, 904-0495 Okinawa Japan
| | - Amy Q. Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology, Onna, Kunigami-gun, 904-0495 Okinawa Japan
| | - Yuanyuan Guo
- Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, Aoba-ku, Sendai, 980-0845 Miyagi Japan
- Graduate School of Biomedical Engineering, Tohoku University, Aoba-ku, Sendai, 980-8579 Miyagi Japan
- Department of Physiology, Graduate School of Medicine, Tohoku University, Aoba-ku, Sendai, 980-8575 Miyagi Japan
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2
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Badalan M, Ghigliotti G, Achard JL, Bottausci F, Balarac G. Physical Analysis of the Centrifugal Microencapsulation Process. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matei Badalan
- Université Grenoble Alpes, CEA, LETI, Technologies for Healthcare and biology division, Microfluidic Systems and Bioengineering Lab, 38000 Grenoble, France
- Université Grenoble Alpes, CNRS, Grenoble INP, LEGI, 38000 Grenoble, France
| | | | - Jean-Luc Achard
- Université Grenoble Alpes, CNRS, Grenoble INP, LEGI, 38000 Grenoble, France
| | - Frédéric Bottausci
- Université Grenoble Alpes, CEA, LETI, Technologies for Healthcare and biology division, Microfluidic Systems and Bioengineering Lab, 38000 Grenoble, France
| | - Guillaume Balarac
- Université Grenoble Alpes, CNRS, Grenoble INP, LEGI, 38000 Grenoble, France
- Institut Universitaire de France (IUF), 75000 Paris, France
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3
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Yonet-Tanyeri N, Amer M, Balmert SC, Korkmaz E, Falo LD, Little SR. Microfluidic Systems For Manufacturing of Microparticle-Based Drug-Delivery Systems: Design, Construction, and Operation. ACS Biomater Sci Eng 2022; 8:2864-2877. [PMID: 35674145 PMCID: PMC10368402 DOI: 10.1021/acsbiomaterials.2c00066] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Particles synthesized from biodegradable polymers hold great potential as controlled drug delivery systems. Continuous flow platforms based on microfluidics offer attractive advantages over conventional batch-emulsification techniques for the scalable fabrication of drug-loaded particles with controlled physicochemical properties. However, widespread utilization of microfluidic technologies for the manufacturing of drug-loaded particles has been hindered largely by the lack of practical guidelines toward cost-effective development and reliable operation of microfluidic systems. Here, we present a framework for rational design and construction of microfluidic systems using commercially available components for high-throughput production of uniform biodegradable particles encapsulating drugs. We also demonstrate successful implementation of this framework to devise a robust microfluidic system that is capable of producing drug-carrying particles with desired characteristics. The guidelines provided in this study will likely help broaden the applicability of microfluidic technologies for the synthesis of high-quality, drug-loaded biodegradable particles.
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Affiliation(s)
- Nihan Yonet-Tanyeri
- Department of Chemical Engineering, University of Pittsburgh, 3700 O'Hara Street, 940 Benedum Hall, Pittsburgh, Pennsylvania 15261, United States
| | - Maher Amer
- Department of Dermatology, University of Pittsburgh School of Medicine, 200 Lothrop Street, W1150 Biomedical Science Tower, Pittsburgh, Pennsylvania 15213, United States
| | - Stephen C Balmert
- Department of Dermatology, University of Pittsburgh School of Medicine, 200 Lothrop Street, W1150 Biomedical Science Tower, Pittsburgh, Pennsylvania 15213, United States
| | - Emrullah Korkmaz
- Department of Dermatology, University of Pittsburgh School of Medicine, 200 Lothrop Street, W1150 Biomedical Science Tower, Pittsburgh, Pennsylvania 15213, United States.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Louis D Falo
- Department of Dermatology, University of Pittsburgh School of Medicine, 200 Lothrop Street, W1150 Biomedical Science Tower, Pittsburgh, Pennsylvania 15213, United States.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States.,Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States.,The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
| | - Steven R Little
- Department of Chemical Engineering, University of Pittsburgh, 3700 O'Hara Street, 940 Benedum Hall, Pittsburgh, Pennsylvania 15261, United States.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States.,The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States.,Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States.,Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States.,Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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Kharal SP, Haase MF. Centrifugal Assembly of Helical Bijel Fibers for pH Responsive Composite Hydrogels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106826. [PMID: 35048516 DOI: 10.1002/smll.202106826] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 12/07/2021] [Indexed: 06/14/2023]
Abstract
In microfluidics, centrifugal forces are important for centrifugal microfluidic chips and curved microchannels. Here, an unrecognized use of the centrifugal effect in microfluidics is introduced. The assembly of helical soft matter fibers in a rotating microcapillary is investigated. During assembly, the fibers undergo phase separation, generating particle stabilized bicontinuous interfacially jammed emulsions gels. This process is accompanied by a transition of the fiber density over time. As a result, the direction of the centrifugal force in the rotating microcapillary changes. The authors analyze this effect systematically with high-speed video microscopy and complementary computer simulations. The resulting understanding enables the control of the helical fiber assembly into microropes. These microropes can be converted into pH responsive hydrogels that swell and shrink with potential applications in tissue engineering, soft robotics, controlled release, and sensing. More generally, the knowledge gained from this work shows that centrifugal forces potentially enable directed self-assembly or separation of colloids, biological cells, and emulsions in microfluidics.
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Affiliation(s)
- Shankar P Kharal
- Department of Chemical Engineering, Rowan University, Glassboro, NJ, 08028, USA
| | - Martin F Haase
- Department of Chemical Engineering, Rowan University, Glassboro, NJ, 08028, USA
- Van't Hoff Laboratory of Physical and Colloid Chemistry, Department of Chemistry, Debye Institute of Nanomaterials Science, Utrecht University, CH Utrecht, 3583, The Netherlands
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New Developments in the Classification, Pathogenesis, Risk Factors, Natural History, and Treatment of Branch Retinal Vein Occlusion. J Ophthalmol 2017; 2017:4936924. [PMID: 28386476 PMCID: PMC5366235 DOI: 10.1155/2017/4936924] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 02/07/2017] [Indexed: 12/15/2022] Open
Abstract
For years, branch retinal vein occlusion is still a controversial disease in many aspects. An increasing amount of data is available regarding classification, pathogenesis, risk factors, natural history, and therapy of branch retinal vein occlusion. Some of the conclusions may even change our impression of branch retinal vein occlusion. It will be beneficial for our doctors to get a deeper understanding of this disease and improve the treatment skills. The aims of this review is to collect the information above and report new ideas especially from the past a few years.
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